5800/NEC Storage NS420 XPRESS U s e r ’ s G u i d e...
Since implementation by customers of each product may vary, the suitability of specific product configurations and applications must be determined by the customer and is not warranted by NEC Computers International B.V. To allow for design and specification improvements, the information in this document is subject to change at any time, without notice.
Using This Guide Welcome to the NEC STORAGE NS420 User Guide. This user's guide provides a quick reference to information about your server system. Its goal is to familiarize you with your system and the tasks necessary for system configuring and upgrading.
Text Conventions This guide uses the following text conventions. IMPORTANT: Items that are mandatory or require attention when using the server Notes give important information about the material being described. NOTE: Safety Indications and Symbols Safety Follow the instructions in this User’s Guide to use your server safely. In this User’s Guide a "WARNING"...
Do not disassemble, repair, or modify the server. Otherwise, an electric shock or fire may be caused. Mandatory Action Unplug the power cord of the server. Otherwise, an electric shock or fire may be caused. Indicates a mandatory action that cannot be specifically identified. Make sure to follow the instruction.
Safety Notices Caution: To reduce the risk of electric shock which could cause personal injury, follow all safety notices. The symbols shown are used in your documentation and on your equipment to indicate safety hazards. Warning: Lithium batteries can be dangerous. Improper handling of lithium batteries may result in an explosion.
PELV (Protected Extra-Low Voltage) Integrity: To ensure the extra-low voltage integrity of the equipment, connect only equipment with mains- protected electrically-compatible circuits to the external ports. Remote Earths: To prevent electrical shock, connect all local (individual office) computers and computer support equipment to the same electrical circuit of the building wiring.
Care and Handling Use the following guidelines to properly handle and care for your system. Protect the system from extremely low or high temperatures. Let the system warm (or cool) to room temperature before using it. Keep the system away from magnetic forces. Keep the system dry.
Chapter 1 System Overview This chapter provides the information necessary to use your Storage server, and includes a description of your system’s major components and functions. Read this chapter to familiarize yourself with your Storage server.
OVERVIEW Front View with Front Bezel Closed The following figure shows the features on the front of the system. Front bezel The front bezel is a cover for protecting and providing security for the front controls and devices in ther server. A security key is provided to lock the cover. Keylock Insert the security key into the key slot of the keylock when unlocking the front bezel.
Front View with Front Bezel Removed 3-4 3-5 3-0 3-1 3-2 6-2 6-3 Thumbscrews (one on each side of the front panel) The screws secure the server to the rack. Handles (one on each side of the front panel) The handles are used to grasp the server unit when sliding it in and out of the rack.. Hard disk bays Each number following the bold-faced number indicates the SCSI ID.
CD-ROM drive 6-1 Disk access lamp 6-2 CD tray eject button 6-3 Emergency hole 3.5-inch floppy disk drive 7-1 Disk access lamp 7-2 Disk slot 7-3 Eject button Backup device bay Use it to install an optional DAT or AIT drive. Front monitor connector Connect a monitor display unit to this connector.
Rear View 14 15 19-2 The LAN connector of (19) and the serial port 2 connector of (4) have the same 19-1 shape. Be careful not to connect a cable to an improper connector. Low-profile PCI board extension slots Mount low-profile PCI boards into these slots. The slot numbers are 3C, 2C, and 1C from top to bottom.
AC inlet (for the power supply unit provided as standard) Connect the power cord to this socket when the power supply unit is mounted in power supply slot 1. AC inlet (for an additional power supply unit) Connect the power cord to this socket when the power supply unit is mounted in power supply slot 2.
Internal View SCSI backplane Power supply unit Cooling fans Processor duct (dashed-line) Riser card (for full-height boards) Processor (mounted under the CPU and heat sink) DIMM (Two DIMMs are mounted as standard in slots #1A and #1B.) Motherboard Riser card (for only low-profile boards) Front panel board Cover open sensor CD-ROM drive...
Motherboard Lamps Rear serial port connector Internal SCSI connector (for relay with internal hard disk) ICMB connector PCI riser slot (For only low-profile boards. 100MHz/64-bit, 3.3V, PCI-X) IPMB connector DIMM sockets (for the interleave type) (The sockets are called #3A, #3B, #2A, #2B, #1A, and #1B sequentially from top.) Processor sockets 7-1 Processor #1 (CPU #1) 7-2 Processor #2 (CPU #2)
The table below explains the STATUS lamp indication, the meanings, and the procedures. NOTES: If NEC ESMPRO or the offline maintenance utility is installed, you can confirm the cause of a failure by referring to the error log. If shutdown processing can be performed through the operating system when you want to restart the system after turning the power off, restart the system by performing shutdown processing.
STATUS lamp Description Procedure indication On (green) The server is operating normally. – • Flashing The server is operating with the Check the AC POWER lamp indication (green) memory, CPU, or power supply on the rear panel of the server. unit in degraded state.
DISK ACCESS Lamp ( ) The DISK ACCESS lamp indicates the status of the hard disk mounted in the 3.5-inch disk bay. The lamp turns green each time access is made to the hard disk. When the DISK ACCESS lamp turns amber, it indicates that a hard disk failure has occurred. Check the hard disk lamp for the status of the failing hard disk.
Hard Disk Lamp The disk lamp mounted in the 3.5-inch disk bay indicates the following depending on the status: Lamp Flashing (green) The lamp indicates that the hard disk is accessed. On (amber) The lamp indicates a failure of a hard disk mounted in disk array configuration. Even if one of the hard disks fails in disk array configuration NOTE: (RAID1, RAID5, or RAID0+1), the server can continue operation.
If the server is turned off during rebuild processing, the IMPORTANT: processing is stopped. Restart the server, mount the new hard disk in hot swap mode, and then perform rebuild processing again. Observe the following notes on using the auto-rebuild function. Do not turn the power off.
Speed lamp This lamp indicates whether each of the network ports normally equipped with the server is operated through the 1000BASE-T, 100BASE-TX or 10BASE-T network interface. If the lamp is lit amber, the network port is operated through 1000BASE-T. If the lamp is lit green, the network port is operated through 100BASE-TX. If the lamp is off, the network port is operated through 10BASE-T.
AC POWER Lamp There is an AC POWER lamp for the power supply unit on the rear. The lamp turns green and flashes when the power supply unit receives AC power from the power cord, which is connected to the AC inlet. The lamp turns green when the server power switch is turned on.
Test and Diagnosis (T&D) BIOS password feature Mechanical security lock Management Utilities Easy and Fine Setup NEC ESMPRO NEC STORAGE NS420 (system setup NEC Management Workstation utility) Application (NEC MWA) Configuration Parameter Diskette Creator SETUP (BIOS setup utility) Maintenance Features...
Power Supplies The power supply consists of the power supply bay and one power supply module. A second power supply module can be purchased to provide a redundant, 1+1 system. With either configuration, the power supply provides 800 watts of power and is designed to minimize EMI. The power subsystem supports implementation of remote management features including remote enable that permits power to be activated from a variety of sources.
SAF-TE LOGIC NOTE: SAF-TE Logic is in systems that include the hot-swap SCSI disk drive cage. SAF-TE Logic is not available in systems that include the standard SCSI disk drive cage. The SCSI backplane includes SAF-TE (SCSI Accessed Fault Tolerant Enclosure) logic that provides an interface to the disk subsystem that supports status signals, hot swapping drives, and enclosure monitoring.
Support for a 3-slot PCI riser card Support for both full length and low profile PCI cards Riser C provides the following features: Bus speed up to 100 MHz 184 pin, 5 volt keyed, 64-bit expansion slot connector Support for a 3-slot PCI riser card Support for only low profile PCI cards Video NOT USED ON A NAS SERVER...
Network Controller To ensure EMC product regulation compliance, the system must NOTE: be used with a shielded LAN cable. The motherboard uses two Intel® 82546EB Fast Ethernet Controllers and supports 10Base-T/100Base-TX/1000Base-T network subsystems. The 82546 EB controller supports the following features: 64-bit, 100 MHz PCI-X interface Integrated IEEE 802.3 10Base-T, 100Base-TX, and 1000Base-T compatible PHY IEEE 820.3u auto-negotiation support...
Events monitored by the manager system include over-temperature and over-voltage conditions, fan failure, or chassis intrusion. Information on NEC MWA may be found on the NEC STORAGE NS420 CD-ROM included with your Storage server. One major function of the BMC is to autonomously monitor system management events, and...
log their occurrence in the nonvolatile System Event Log (SEL). The events being monitored include overtemperature and overvoltage conditions, fan failure, or chassis intrusion. To enable accurate monitoring, the BMC maintains the nonvolatile Sensor Data Record (SDR), from which sensor information can be retrieved. The BMC provides an ISA host interface to SDR sensor information, so that software running on the server can poll and retrieve the server's current status.
Failed DIMMs and processors may be identified on the screen that the POST displays, or with the BIOS setup utility of the server, "SETUP." They may also be identified on the system that has the NEC ESMPRO installed. REMOTE POWER-ON FEATURE (WAKE ON LAN) The remote power-on function turns on the server through a network.
SYSTEM SECURITY To help prevent unauthorized entry or use of the system, the system includes a full lockable front bezel and Server Management software that monitors the front bezel intrusion switch. Security with Mechanical Locks and Monitoring To unlock the bezel, insert the key in the lock and turn the lock counterclockwise until it stops (about a quarter turn).
Using Passwords You can set either the user password, the supervisor password, or both passwords. If only the user password is set, you: Must enter the user password to enter BIOS Setup. Must enter the user password to boot the server if Password on Boot is enabled in the BIOS Setup.
Summary of Software Security Features The table below lists the software security features and describes what protection each offers. In general, to enable or set the features listed here, you must run the BIOS Setup and go to the Security Subsystem Group, menu. The table also refers to the Setup utility. Software Security Features Feature Description...
Normally the maintenance engineer uses this utility. Refer to Chapter 8 for details. SYSTEM DIAGNOSTIC UTILITY The system diagnostic utility contained in the NEC STORAGE NS420 is useful to prevent the hardware failures. See Chapter 7 for details. NEC MANAGEMENT WORKSTATION APPLICATION...
USING YOUR STORAGE SERVER This section describes basic operations of the server including how to use devices such as the floppy disk drive and the CD-ROM drive. See Appendix B for notes on using the floppy disk, CD-ROM, and accessories. Front Bezel Remove the front bezel to power on/off the server, to access the floppy disk drive, CD-ROM drive, and a removable media device, and to install/remove hard disks to the 3.5-inch disk bays.
Slide the front bezel to the left a little to remove the tab from the frame and then remove the front bezel from the server. To install the front bezel, latch the tab at the left side of the front bezel on the server frame. After the installation, lock the front bezel by using the key for security.
POWER switch on the front panel. This is normal system operation and is required by the server management logic. Do not turn off the server until characters following the "NEC" logo appears on the screen. 30 System Overview...
BIOS SETUP utility, such as the start-up message, while in progress. With the factory setup of the server, the NEC logo appears on the display unit while POST is in progress. (To display the POST check results, press Esc.)
The memory check may takes a few minutes to complete depending on the memory size of the NEC express server. Also, it may take approximately one minute for the screen display to appear after rebooting the server.
BIOS SETUP utility. (The start message and operation may vary depending on the mounted board.) For details, see the manual provided with the board or the online document in the NEC STORAGE NS420 CD-ROM provided with the server.
POST Error Messages When POST detects an error, it displays an error message on the display unit screen. See Chapter 8 for POST error codes. IMPORTANT: Take a note on the messages displayed before consulting with your sales agent. Alarm messages are useful information for maintenance.
Identification of Servers ~ UID Switch ~ An "UID (Unit ID) lamp" is provided on the front panel and rear panel. If more than one server is mounted in a single rack, the lamp identifies the server you are going to maintain. The UID lamp goes on when the UID (Unit ID) switch on the front panel is pressed.
Power on the server to start software setups. Installing the operating system Install an operating system to the Storage server. Installing the utilities Install the utilities and the additional software in the provided NEC STORAGE NS420 CD-ROM. 38 Setting Up Your Storage Server...
SELECTING SERVER SITE To use the server, install it on a standard EIA 19-inch rack assembly. Refer to the documentation attached to the rack or contact your sales agent for the installation of the server on the rack. WARNING Observe the following instructions to use the server safely. Failure to follow these instructions may result in death or serious personal injury.
Do not install the rack in the places listed below. Installing the rack or mounting the server on the rack in such a place may cause some malfunction to occur. Narrow space from which devices cannot be pulled out from the rack completely Place that cannot bear the total weights of the rack and devices mounted on the rack Place where stabilizers cannot be installed or where the rack can be installed only after the practice of proper earthquake-resistant construction...
UNPACKING THE SYSTEM When you receive your system, inspect the shipping containers prior to unpacking. If the shipping boxes are damaged, note the damage, and if possible, photograph it for reference. After removing the contents of the containers, keep the cartons and the packing materials. If the contents appear damaged when you unpack the boxes, file a damage claim with the carrier immediately.
INSTALLING THE SERVER This subsection provides the instructions for the Storage server unit into a standard EIA 19-inch rack cabinet. Also this subsection describes the removal procedures for the Storage server unit from the 19-inch rack cabinet. WARNING Observe the following instructions to use the server safely. Failure to follow these instructions may result in death or serious personal injury.
Restricted Access Location The server is intended for installation in a restricted access location, mounted above a non-combustible material. ESD Precaution An electrostatic discharge (ESD) can damage disk drives, option boards, and other components. You can provide some ESD protection by wearing an antistatic wrist strap attached to chassis ground when handling system components.
Installation Procedure for NEC Rack/Third Vendor's Rack This server can be installed in either the NEC rack or a third vendor's rack. Take the following procedure to install the server in the rack: Removing the Rail Assemblies Remove the sliding rails from the server.
Adjust the screw hole (slot) at the top end of each rail assembly to the screw hole in the rail bracket, and lightly tighten the screw to temporarily secure the rail assembly and bracket. The screw should not be firmly tightened for adjusting the depth and length of the rack by the rail bracket.
Installing the Rail Assemblies Push up the catch at the top end of each rail assembly. Butt the top frame to the rack frame through the inside of the rack, and secure the rail assembly with two screws and two washers. NOTE: Position the rail assembly so the screw slot at the top becomes vertical.
Firmly secure the rail bracket. Installing the Server CAUTION Observe the following instructions to use the server safely. Failure to follow these instructions may cause a fire, personal injury, or property damage. See pages 1-3 to 1-8 for details. Do not lift the server only by a single person. Do not pinch your finger with mechanical components.
At least two persons are required to install the server. Securely hold the server and install it in the rack. Firmly fit the inner rails on the sides of the server into the rail assemblies that are installed on the rack, and then slowly push the server into the rack. If the server is locked on its way into the rack, slowly push it in while pressing the release levers on the right and left sides of the server.
Securing the Server Captive thumb screws Push the server into the rack as far as it will go. Tighten the right and left captive thumb screws on the front panel to secure the server to the rack. Install the front bezel. This completes the installing of the server.
First, install the cable arm on the mounting rail using the 2 upper screws of the left rail bracket, like shown on the picture. Second, install the cable arm on the server chassis using the 2 screws of the Power supply Unit. Finally, install the arm stopper on the mounting rail using the 2 upper screws of the right rail bracket 50 Setting Up Your Storage Server...
Removing the Server from the Rack Assembly The server should be removed from the rack by at least two persons. WARNING Observe the following instructions to use the server safely. Failure to follow these instructions may result in death or serious personal injury. See pages 1-3 to 1-8 for details.
Hold the handle and pull out the server from the rack slowly and carefully. The server clicks to be latched. Handles Captive thumb screws Pull out the server from the rack with the right and left release lever pressed to release the latch.
See pages 1-3 to 1-8 for details. Do not connect any interface cable with the power cord of the NEC Express Server plugged to a power source. Do not use any unauthorized interface cable.
USB device Display unit FRONT Device with the serial interface Finally connect the (e.g., Management Device with the provided power cord to SCSI interface Device with the the receptacle. serial interface USB device If connecting the server Keyboard Mouse to UPS, see the explanation below.
Connecting Power Cord Connect the provided power cord to the server. WARNING Observe the following instructions to use the server safely. Failure to follow these instructions may result in death or serious personal injury. See pages 1-3 to 1-8 for details. Do not hold the power plug with a wet hand.
The UPS service outlets are categorized into two groups: SWITCH OUT and UN-SWITCH OUT. (They may be called "OUTPUT1" and "OUTPUT2".) To control power supply with an application (NEC ESMPRO/UPSController) that controls the UPS, connect the power cord to an SWITCH OUT outlet.
TURNING ON THE SERVER Turn on the server and follow the on-screen instructions for setup. IMPORTANT: Before turning on the server: Some optional boards require setups with the SETUP utility before installation. If the server has a PCI board with the PCI-to-PCI bridge installed, the SETUP utility is enabled to launch.
The POWER lamp on the front of the server comes on. In a few seconds, the NEC logo appears on the screen and the Power On Self-Test (POST) begins. The POST runs automatically when you power on the server or reset it with a keyboard operation (Ctrl + Alt + Delete).
INSTALLING OPERATING SYSTEM Just power on your NEC STORAGE NS420 for initial setup of your server. If you need to re-install your system, boot with the NEC STORAGE NS420 Recovery CD and the floppy containing the SYSPREP.INF file. Setting Up Your Storage Server 59...
When you install the server for the first time or install/remove optional devices, thoroughly read this chapter for a better understanding BIOS setup requirements. SYSTEM BIOS ~ SETUP ~ The BIOS SETUP utility allows you to make basic hardware configuration changes to the server.
Starting the SETUP Utility Powering on the server starts POST (Power On Self-Test) and displays its check results. After a few seconds, the following message appears at bottom left on the screen. Press <F2> to enter SETUP Press F2 to start the BIOS SETUP utility and display its Main menu. NOTE: If the F2 key is not working, you‘ll have too reconfigure the keyboard key as “Terminal Key”...
Description of On-Screen Items and Key Usage Use the following keyboard keys to make changes in the SETUP utility. (Key functions are also listed at the bottom of the screen.) Indicates the current menu. BIOS Setup Utility Main Advanced Security Server Boot Exit...
Configuration Examples The following describes examples of configuration changes required to use the software-link features or for system operations. Date and Time To display system date or time Select [Main] - [System Time], [System Date]. Link with Management Software To link with the temperature monitoring feature of ESMPRO Select [Server] - [Temperature Sensor] - [Enabled].
Boot To change the boot order of devices connected to the server Select [Boot] and specify the boot order. To display POST check results Select [Boot] - [Quiet Boot] - [Disabled]. You can also press Esc while the log is on the screen to display POST check results. To use remote wake-up feature Via Modem: Select [Advanced] - [Advanced Chipset Control] - [Wake on Ring] - [Enabled].
Memory To enable the memory degradation feature Select [Advanced] - [Memory Configuration] - [Extended Memory Test] - [Every-Location]. To check the installed memory (DIMM) status Select [Advanced] - [Memory Reconfiguration] - [Bank #n] and check the status indications. (n: 1 - 3) The on-screen DIMM numbers and socket locations on the system board are shown in the figure below.
To check the installed CPU status Select [Main] - [Processor Settings] and check the status indications. The on-screen CPU numbers and socket locations on the system board are shown in the figure on the previous page. To clear the CPU error information Select [Main] - [Processor Settings] - [Processor Retest] - [Yes] and reboot the server.
To clear the hardware configuration data (after installing/removing internal devices) Select [Advanced] - [Reset Configuration Data] - [Yes]. Saving the Configuration Data To save the BIOS configuration data Select [Exit] - [Exit Saving Changes]. To discard changes to the BIOS configuration data Select [Exit] - [Exit Discarding Changes] or [Discard Changes].
Menu and Parameter Descriptions The SETUP utility has the following six major menus: Main Advanced Security Server Boot Exit To set specific functions, select a submenu from the above menus. The following describes available functions and parameters, as well as the factory -set parameters, for each menu. Main Start the SETUP utility to display the Main menu.
Option Parameter Description Your Setting System Time HH:MM:SS Sets the system time. System Date MM/DD/YYYY Sets the system date. Floppy A: Not Installed Sets the floppy disk drive A (standard configuration). [1.44/1.25 MB/1.2 MB 3.5"] 2.88 MB 3.5" Hard Disk Pre-delay [Disabled] Causes the BIOS to insert a delay before attempting to...
Processor Settings Select "Processor Settings" on Main menu to display the following menu. See the table below for setup options on the screen. Option Parameter Description Your Setting Processor Type – Reports the type of processor(s) installed in system. (View only) Processor POST –...
Advanced Move the cursor to "Advanced" to display the Advanced menu. Menu items preceded by " " ► " mark and press Enter to display its submenu. has submenus. Select an option with the " ► See the table below for setup options on the screen. Option Parameter Description...
PCI Configuration Select "PCI Configuration" on the Advanced menu to display the following screen. Option Parameter Description Your Setting PCI Slot nB ROM* [Enabled] Used to enable or disable an option (n: slot number) ROM that may be present on a PCI Disabled add-in card connected to the full-height riser card.
USB Function Submenu Option Parameter Description Your Setting USB Function [Enabled] Enables or disables the onboard USB controller BIOS. Disabled [ ]: Factory-set Onboard NIC 1 / Onboard NIC 2 Submenu Option Parameter Description Your Setting Onboard NIC [Enabled] Enables or disables onboard LAN controller.
Peripheral Configuration Select "Peripheral Configuration" on the Advanced menu to display the following screen. Displayed only when the user password is set. See the table below for setup options on the screen. Avoid conflicts in the interrupt requests or base I/O IMPORTANT: addresses.
Option Parameter Description Your Setting Serial Port 1 Disabled Used to configure the base I/O Address address for serial port 1. [3F8] Serial Port 1 IRQ Used to configure the interrupt for serial port 1. Serial Port 1 Disabled Used to configure the base I/O Address address for serial port 2.
Memory Configuration Select "Memory Configuration" on the Advanced menu to display the following screen. See the table below for setup options on the screen. Option Parameter Description Your Setting Extended Memory 1 MB Extended memory test options run during Test POST.
Advanced Chipset Control Select "Advanced Chipset Control" on Advanced menu to display the following screen. See the table below for setup options on the screen. Option Parameter Description Your Setting Wake on Ring [Disabled] Enables or disables the remote power-on features via serial port Enabled (modem).
Security Move the cursor onto "Security" to display the Security menu. Selectable only when the User password is set. Select "Set Administrator Password" or "Set User Password" and press Enter to display the following pop-up screen. The screen below shows when "Set Administrator Password" is selected. Set a password on this pop-up screen.
See the table below for setup options on the screen. Option Parameter Description Your Setting User Password is Installed Indicates whether the user password is set or not (view only). Not Installed Administrator Installed Indicates whether the administrator password Password is is set or not (view only).
The table below lists options that you can specify on the Server menu screen and their functions. To make a selection for "System Management", "Console Redirection", and "Event Log Configuration", first select a desired option and press Enter to display its submenu. See the table below for setup options on the screen.
The table below lists how selections for "After Power Failure" determine the power status of the server when the power supply to the server restarts. Parameter State before powered off Stays Off Last State Power On In service Out of service (DC power: Off) Forced shutdown * Pressing the POWER switch for at least four seconds shuts down the power to the server.
System Management Submenu Select "System Management" on the Server menu and press Enter to display the following screen. See the table below for setup options on the screen. Option Parameter Description Your Setting Board Part Number – Indicates the part number of system board.
Console Redirection Select "Console Redirection" on the Server menu and press Enter to display the following screen. See the table below for setup options on the screen. Option Parameter Description Your Setting Serial Console [Disabled] Specifies whether BIOS uses the specified serial port to redirect the console to MWA Redirection Enabled...
Event Log Configuration Submenu Select "Event Log Configuration" on the Server menu and press Enter to display the following screen. See the table below for setup options on the screen. Option Parameter Description Your Setting Clear All Event [No] Clears the DMI event log after a system Logs reboot.
See the table below for setup options on the screen. Option Parameter Description Your Setting Quiet Boot Disabled If disabled, displays normal POST messages. [Enabled] If enabled, displays NEC Logo instead of POST messages. Enabling this option disables console redirection. [ ]: Factory-set Setting Up Your Storage Server 85...
Boot Device Priority The system searches for the boot device according to the order specified in this menu and use the software to boot the system if found. Move the cursor to select the device by ↑ or ↓, and then change the priority using + or –. The following settings must be applied: Option Parameter...
Removable Devices Submenu Select the removable device used to boot the system. The system searches for the boot device according to the order specified in this submenu and use the software to boot the system if found. Move the cursor to select the device by ↑ or ↓. Item Description Lists Bootable Removable...
Exit Move the cursor onto "Exit" to display the Exit menu. The following describes each option on the Exit menu: Exit Saving Changes Select this option to save the current configuration data into the CMOS (non-volatile memory) and exit the SETUP utility. Select "Yes"...
Load Custom Defaults Select this option and press Enter to load the custom defaults saved from previous Save Custom Defaults. Save Custom Defaults Select this option and press Enter to save the current configuration data as custom defaults. When the configuration is saved, the Load Custom Defaults menu appears. Discard Changes Select this option to discard any changes made to BIOS settings and restore the previous settings.
SCSI BIOS ~ SCSI Select ~ The SCSISelect utility is provided to configure the SCSI controller on the system board (or the SCSI controller on an optional board). This utility may be started with a simple key operation while POST is in progress and requires no specific start-up disk. Using SCSI Select Utility Use the SCSISelect utility mainly to set the transfer speed of connected SCSI devices.
Procedure from Start-up to Exit The following describes the procedure from starting to exiting the SCSI Select utility. For parameter descriptions, see the section "Parameters" described later. Power on the Express server. The following message appears while POST is in progress. The message appears for each additional SCSI IMPORTANT: controller.
The Configuration menu appears. Configuration SCSI Bus Interface Definitions Host Adapter SCSI ID ..........SCSI Parity Checking ..........Enabled Host Adapter SCSI Termination ........Enabled Additional Options Boot Device Options............ Press<Enter> SCSI Device Configuration .......... Press<Enter> Advanced Configuration Options......... Press<Enter> <F6>...
Parameters The SCSISelect utility to configure the internal SCSI controller of the server has the following menu items and parameters. Read descriptions to select a correct parameter for each menu item. For configuration of optional SCSI controllers and connected SCSI devices, see the section "Configuring SCSI Controller on Optional Board"...
Additional Options To set three menu items under "Additional Options", select a menu item with the cursor keys (↓ or ↑) and press Enter to display its submenu. Then, select a submenu item with the cursor keys (↓ or ↑) and press Enter to fix the item. Use the cursor keys (↓ or ↑) for parameter selection. Boot Device Options Move the cursor onto "Boot Device Options"...
ID basis. Verify the SCSI ID of a desired device before configuration. Setting Up Your Storage Server 95...
To find out the SCSI ID for the optional device connected, NOTE: select "SCSI Disk Utilities" on the Options menu and press Enter. The SCSI ID scan begins displaying the message as shown below. Scanning SCSI ID : 0 LUN Number : 0 When the SCSI ID scan completes, the screen listing SCSI IDs and associated devices appears.
Submenu item Parameter Description Sync Transfer Rate  20.0 Select  as a recommended. (MB/Sec) 80.0 16.0 You may need to change the value depending on your optional device. 53.4 13.4 Refer to the manual that comes with your 40.0 10.0 optional device.
The following table lists submenu items, available parameter, and descriptions. Submenu item Parameter Description Reset SCSI Bus at [Enabled] Select "Enabled". IC Initialization Disabled Display <Ctrl><A> [Enabled] Select "Enabled". Message During Disabled BIOS Initialization Extended BIOS [Enabled] Select "Enabled". Translation for DOS Disabled Driver >...
Configuring SCSI Controller on Optional Board To configure SCSI devices connected to an optional SCSI controller board, use the SCSI BIOS utility provided with the optional SCSI controller board. Refer to the manual that comes with the optional SCSI controller board for details. When the server has multiple SCSI controller boards installed, the server first displays the start-up message of the SCSISelect utility for the SCSI controller on the system board.
CONFIGURING MOTHERBOARD JUMPERS With the pre-installed SETUP utility, you can set desired passwords to protect the data stored in the server against access from unauthorized users. When you forget the passwords, however, you may want clear them. The following describes how to clear these passwords. You can also use the following procedure to clear the CMOS data in the server.
The following describe the clearing procedure. WARNING Observe the following instructions to use the server safely. Failure to follow these instructions may result in death or serious personal injury. Do not disassemble, repair, or alter the server. Do not remove the lithium battery. Do not connect the ground line to a gas pipe.
Press the F2 key to activate the SETUP utility. Select [Exit Saving Changes] from the [Exit] menu, and then [Yes]. Wait until the message "Turn off power and reinstall the jumper in Normal mode position" appears. Turn off the system power switch. Change the jumper switch setting back to the original position, turn on the power, and then define the setting by using the BIOS SETUP utility.
Familiarizing with NEC Storage NS420 Component Names The following image shows the components of a NEC Storage NS420. The controller is described on the “NS420 User’s Guide” CONTROLLER DISK EXPANSION UNIT (DEU) Figure 1: NEC Storage NS420 Components Read these documents first to understand how to select a site, unpack the components, install your rack-mount components, and make cable connections, power on and setup your components.
Controller Front Panel Figure 2: Front Panel Switches and LEDs The Switches and LEDs indicates the following: POWER switch Press this switch to turn the server on/off. Pressing the switch once turns on the power, and the POWER lamp is lit. Pressing this switch again turns off the power.
Controller Back Panel RAID / SCSI connection for Optionnal DEU LAN 1 UPS Connections LAN 2 Power Connectio Port SCSI Figure 3: Back Panel LEDs AC POWER lamp This lamp turns green and flashes when the server receives AC power from the power cord. The lamp turns green when the server power switch is turned on, and it turns amber when a power failure occurs.
Status Indicators This section describes the server indicator lamps. POWER Lamp ( The POWER lamp is on (green) when power is applied to the server and the power switch is on. It is off if power is not applied to the server. This server does not support the power saving mode.
STATUS lamp Description Procedure indication On (green) The server is operating normally. No action required. Flashing The server is operating with the CPU or memory error. Verify which (green) memory, CPU, or power supply unit CPU or memory bank was disabled by in degraded state.
DISK ACCESS Lamp ( ) The DISK ACCESS lamp indicates the status of the hard disk mounted in the 3.5-inch device bay. The lamp flashes green each time access is made to the hard disk. When the DISK ACCESS lamp turns amber, it indicates that a hard disk failure has occurred.
mode.) Flashing, switching back and forth between green and amber The lamp indicates that reconstruction (rebuild) processing is being performed for the hard disk. (This flashing does not indicate a failure.) When a failing hard disk is replaced in disk array configuration, the system automatically rebuilds the data (Auto-rebuild function).
(amber), it indicates that the communication mode is activated with 100BASE-TX. Data transfer rate is 100Mb/s. When the lamp is off, it indicates that the communication mode is activated with 10BASE-T. Data transfer rate is 10Mb/s. AC POWER Lamp There is an AC POWER lamp for the power supply unit on the rear. The lamp turns green and flashes when the power supply unit receives AC power from the power cord, which is connected to the AC inlet.
Insert the other end of this cable into network hub or switch. Figure 5: NIC Connections Connect a UPS to the NEC Storage NS420 (Optional) Use COM1 or COM2 located on the rear panel to connect your UPS to NEC Storage NS420. Turning on the Power...
Connect one end of the enclosed power cord to a power source. Plug the other end into the first power receptacle (POWER1) on the rear panel shown in Figure below. Connect the second enclosed power cord to a power source and plug the other end into the second power receptacle (POWER2).
NS420 unit is connected. Insert the NEC Storage NS420 Management/Maintenance CD into your CD- ROM drive. If the “NEC Storage NS Series” screen does not appear, the auto- insert notification for the CD has been turned off. In this case, use Windows Explorer to launch the setup program from the CD.
NEC Storage NS420. Changing the administrator password is detailed on next sections. This completes the creation of a NEC Storage NS420 setup disk containing initialization information. 114 Setting Up Your Storage Server...
Complete the NEC Storage NS420 installation To complete the NEC Storage NS420 installation: 1. Insert the setup disk into the floppy disk drive of NEC Storage NS420. 2. Turn on NEC Storage NS420 and it starts operation. Verify the beep codes when starting NEC Storage NS420 for the first time. NEC Storage NS420 has started normally when it repeats the beep pattern (2 long beeps and 4 short beeps) four times.
“Static IP Address” to your unit. See your network administrator for an available IP address before proceeding. To set an IP address, highlight the default name of your NEC Storage NS420 with a single mouse click and then select the Change Settings button.
Insert the NEC Storage NS420 Management/Maintenance CD into your CD- ROM drive. When the NEC Express5800 Series screen appears, click the NEC MWA button. The wizard will guide you through the installation process. Initializing NEC Storage NS420 BMC in LAN Connection Mode 1.
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Chapter 3 Configuring your NEC STORAGE NS420...
Then select Identification Changing the Server Name When changing the name of your NEC Storage NS420, you may use any combination of alpha- numeric characters (without spaces). Delete the default server name in the Server Appliance Name field. Enter a new server name.
NEC Storage NS420. Setting Time & Date The last step is to set the date, time and time- zone for your NEC Storage NS420. Select Maintenance from the blue navigation bar at the top of the web UI.
5. Select the Services 6. Double-click SNMP Service in the list of services. The SNMP Service Properties dialog (Figure below) opens. Figure 1: SNMP Service Properties 7. Edit values as needed on the Agent, Traps, and Security tabs. CAUTION Do not alter values on the other tabs. For information on specific fields in the tabs, right- click a field to view “What's This?”...
The two (or Four is your NEC Storage NS420 is equipped with an optional 10/100 Dual Port Adapter) 10/100 Ethernet port are not configured. It is necessary to define your configuration to access the NEC Storage NS420 from these ports.
6. Select the Enable the UPS service on this appliance check box. 7. Choose OK Disks Setup NEC Storage NS420 uses disk arrays. A disk array controller manages these disks. The disk array is in a RAID configuration. The default configuration, RAID5, is chosen for both redundancy and performance.
You will be prompted to confirm Reboot, select OK. Your NEC Storage NS420 will now reboot. You must now close your browser session. Once rebooted your NEC Storage NS420 is now ready for use. You may begin sharing files using the default “Public” share folder located through Network Neighborhood, or create additional shares by following the instructions in the Users Guide.
IMPORTANT: Optional devices described in this chapter may be installed or removed by the user. However, NEC does not assume any liability for damage to optional devices or the server or malfunctions of the server resulted from installation by the user.
For proper cooling and airflow, always replace the top cover before powering on your system. Note: Your system error log will be lost, if your system ac power source is off or disconnected. 128 Upgrading Your NEC Storage...
– Keep any component in an anti-static bag until you actually install it to the server. – Hold a component by its edge to avoid touching any terminals or parts. – To store or carry any component, place it in an anti-static bag. Upgrading Your NEC Storage 129...
Press the POWER switch to power off the server (the POWER lamp goes off). Remove all cables and power cords from the server. NOTE: You will need a Phillips screwdriver and a flat-blade screwdriver to install or remove components in this server. 130 Upgrading Your NEC Storage...
Insufficient cooling raises the internal temperature, which causes the server to malfunction. Confirm system operation Adding some additional devices may require you to run the diagnostic utility or BIOS setup utility to ensure the device is installed correctly. Upgrading Your NEC Storage 131...
A dummy tray is installed in the hard disk drive bays except the one with SCSI ID0 defined. The purpose of a dummy tray is to increase the cooling effect in the server. Always install a dummy tray in slots not containing a hard disk drive. 132 Upgrading Your NEC Storage...
The server has six slots. Install hard disk drives in ascending order of the SCSI ID numbers. The SCSI IDs assigned to the slots are all determined. Security lock Release the lock by pushing the dummy tray lever. Upgrading Your NEC Storage 133...
Pull the dummy tray handle. Remove the dummy tray. Keep the dummy tray for future use. IMPORTANT: 6579-00 Secure the drive in the drive carrier with the four screws supplied with the disk drive. 134 Upgrading Your NEC Storage...
The handle is locked when a "click" is heard. Be careful not to get your finger caught between the IMPORTANT: handle and tray. Confirm that the handle is hooked to the frame when having NOTE: inserted the hard disk drive. Upgrading Your NEC Storage 135...
Install the front bezel you removed in step 2. There are tabs on the left side of the front bezel. Engage the tabs with the server frame, install the front bezel, and lock it with the security key. Frame Tabs 136 Upgrading Your NEC Storage...
See the section "Preparing for Installation and Removal" described earlier to prepare. Unlock the front bezel with the security key, and remove the front bezel. Security lock Lift up the carrier handle at the bottom of the floppy disk drive. Carrier handle Upgrading Your NEC Storage 137...
IMPORTANT: Keep the removed floppy disk or CD-ROM drive for future use. Install the provided spacer on the server. Secure the drive in the drive carrier with the four screws supplied with the disk drive. 138 Upgrading Your NEC Storage...
Install the front bezel you removed in step 2. There are tabs on the left side of the front bezel. Engage the tabs with the server frame, install the front bezel, and lock it with the security key. Upgrading Your NEC Storage 139...
Push the lever to unlock, and put the handle down. Firmly hold the handle and hard disk drive, and pull out the hard disk drive. If using the server with the hard disk drive removed, install the dummy tray in the empty slot. 140 Upgrading Your NEC Storage...
Do not replace another hard disk while rebuilding is in progress. (The DISK lamp flashes in green and amber alternatively while rebuilding the hard disk.) Perform the above procedure when replacing the hard disk drive in the flex bay. Upgrading Your NEC Storage 141...
Install the front bezel you removed in step 2. There are tabs on the left side of the front bezel. Engage the tabs with the server frame, install the front bezel, and lock it with the security key. 142 Upgrading Your NEC Storage...
Pull the cable arm toward the rear of the server, and locate the slot for installing an optional power supply unit. Hold and pull the handle of the blank cover. The blank cover is unlocked. Remove the blank cover. Keep the removed blank cover for future use. IMPORTANT: Upgrading Your NEC Storage 143...
Insert the power supply unit. NOTE: Confirm that the handle is securely hooked. Hook IMPORTANT: Do not touch the terminals of the power supply unit. Gold edge connectors 144 Upgrading Your NEC Storage...
See Chapter 6 for details on the error messages. If the AC POWER lamps are off, reinstall the power supply units. If the same error message still appears, contact your sales representative. Upgrading Your NEC Storage 145...
POWER lamp of the new power supply unit goes on. (If it is replaced while the power is off, the lamp flashes. The lamp goes on when the power is turned on.) 146 Upgrading Your NEC Storage...
See the section "Preparing for Installation and Removal" described earlier to prepare. Unlock the front bezel with the security key and remove the front bezel. Security lock Loosen the two set screws on the front panel. Upgrading Your NEC Storage 147...
Slide the top cover toward the rear of the server while pressing the lock button on the cover. Lift off the top cover from the server. Installation When installing the top cover, confirm that the tab of the cover is securely inserted into the slot in the server frame. 148 Upgrading Your NEC Storage...
If the release button is held down (hollow state), slide the top cover toward the front of the server again. If the top cover is not locked yet, remove the cover, and then install it again. Upgrading Your NEC Storage 149...
For static notes, see the section "Anti-static Measures" described earlier. Make sure to use DIMMs authorized by NEC. Installing third-party DIMMs may cause a failure of a DIMM or a failure in the server. 150 Upgrading Your NEC Storage...
Example: Frequency of 133 MHz, buffered, capacity of 128 MB, raw address of 12 bits, column address of 10 bits, and single side 133 / B / 128 / R12 C10 S Single side Column address Raw address Capacity Buffered Frequency Upgrading Your NEC Storage 151...
Make sure of the orientation of the DIMM. Each DIMM has a slit on the terminal side for preventing wrong insertion. The levers automatically close when the DIMM is inserted into the socket. Key slot Key slot 152 Upgrading Your NEC Storage...
This setting is required to change the hardware configuration data. See Chapter 3 for details. Your operating system is Windows 2000, set the paging file size to the recommended value or a greater value as shown below. – For Windows 2000: Total memory size × 1.5 Upgrading Your NEC Storage 153...
Retest] → [Enabled] to clear the error information of the removed DIMM. (See Chapter 3 for details.) Select "Yes" for [Reset Config Data] on the Advanced menu. This setting is required to change the hardware configuration data. See Chapter 3 for details. 154 Upgrading Your NEC Storage...
CPU may cause a failure of the CPU as well as the server. Repair of the server due to failures or damage resulted from installing such a board will be charged. NEC CI recommend that you backup all your data before starting to upgrade your CPU Processor 2...
See the section "Preparing for Installation and Removal,” described earlier to prepare. Pull out the server from the rack. Open the top cover. Remove the processor duct from the chassis. Locate the CPU socket, which you are going to install CPU. Upgrading Your NEC Storage 157...
CPU correctly. The motherboard has "zero insertion force" sockets. If CPU does not drop easily into socket holes, make sure lever is in the full-open position. Pin mark 158 Upgrading Your NEC Storage...
(2) Align the clip with the slot in the heat sink and press down on the center of the clip until it snaps over the center tab. (3) Snap the remaining end of the clip down over its tab. The bracket-attached side must be engaged with the rear of the socket. Upgrading Your NEC Storage 159...
If POST displays an error message, take a note on the message and see the POST error messages listed in Chapter 8. Set "Reset Config Data" on the Advanced menu to "Enable". This setting is required to change the hardware configuration data. 160 Upgrading Your NEC Storage...
Three PCI boards can be installed on each riser card. (Up to six PCI boards can be installed in total.) Insert PCI boards for network extension and file device function extension into PCI board slots in each riser card. Upgrading Your NEC Storage 161...
ROM needs to be loaded. Use the BIOS setup utility "SETUP" for the setting. For details, see Chapter 3. Riser card slot (Dedicated to low-profile PCI boards) REAR FRONT Riser card slot (Dedicated to full-height PCI boards) System board Rear view of the server 162 Upgrading Your NEC Storage...
The SCSI controller installed on the low-profile riser card cannot be connected to a device additionally installed in the internal backup device bay. Upgrading Your NEC Storage 163...
Plastic loop Low-profile type Full-height type Unlock and open the retainer clip. Retainer clip Retainer clip Low-profile type Full-height type Remove the extension slot cover. Keep the removed extension slot cover for future use. NOTE: 164 Upgrading Your NEC Storage...
Before installing a PCI board of the full-height/full-length type, remove the retainer from the PCI board, and then unlock and open the card retainer clip on the other side of the guide rail. Retainer Board retainer clip Hole Hook Lock tab Upgrading Your NEC Storage 165...
If a full-height PCI board is installed, confirm that the PCI board bracket and the edge of the opposite card are inserted in the guide rails of the riser card. 166 Upgrading Your NEC Storage...
This step is required only for a PCI board of the full-height/full-length type. Close the card retainer clip to lock the card. Board retainer clip Hole Hook Close the retainer clip to lock the card. Retainer clip Retainer clip Lock tab Lock tab Low-profile type Full-height type Upgrading Your NEC Storage 167...
Confirm that any cable in the system is not caught in the riser card. The hinge must be inside the plate. No cables may be caught. Plate Hooked Hooked Hooked Low-profile type Full-height type 168 Upgrading Your NEC Storage...
Removing a PCI Board Remove a PCI board in reverse order of the installation steps. After the removal, start the BIOS setup utility, select [Boot] → [Boot Device Priority], and set the new boot priority. (See Chapter 3.) Upgrading Your NEC Storage 169...
A disk expansion unit is an exclusive device that can add up to 14 hard disk drives to your server. (The number of hard disk drives depends on the DEU model.) The server containing a disk array controller board can connect to one or two DEUs. For details on the number of 170 Upgrading Your NEC Storage...
Administration/Management CD provided with the NEC Storage NS or the manual provided with the board. While a disk expansion unit is set in a disk array configuration, you can use the "Auto Rebuild"...
SCSI ID different from those of other devices. For the settings, see the manual provided with the server. Install only a backup device specified by NEC. The size of a backup device which can be installed in this server is as follows: Width: Up to about 9 cm (3.5 inches)
Release tab Main power cable IMPORTANT: Be careful not to damage the main power cable or the flat cable and components in the server. Lift straight up and remove the fan unit from the server. Upgrading Your NEC Storage 173...
IMPORTANT: Be careful not to bend the latching tab by applying excess force. If the tab bends, straighten it out as it was. Remove the device carrier from the front of the server. 174 Upgrading Your NEC Storage...
Be sure to use the screws provided with the backup device. Position the backup device so that the device screw holes align with the screw holes in the device carrier. Connect the provided power extension cable to the power connector of the device. Upgrading Your NEC Storage 175...
Use the SCSI cable provided with this server. Connect the other end of the SCSI cable to the SCSI connector on the SCSI controller board or the system board (if no cable is connected there). Power cable (P3) Power extension cable 176 Upgrading Your NEC Storage...
This is to prevent the cable from being damaged. Terminator SCSI cable Latching tab If the power extension cable is connected, push it toward the rear of the device bay so that it will not bother your work. Upgrading Your NEC Storage 177...
NOTE: Confirm that the release tab of the fan unit is locked. Connect the two fan cables. Connect them according to the print on the system board. Connect the FPC cable. 178 Upgrading Your NEC Storage...
Confirm that the SCSI cable does not cover the ventilation hole NOTE: of cooling fan of the power supply unit. SCSI backplane Do not cover the ventilating holes of the cooling fan with any cable. Upgrading Your NEC Storage 179...
Install the components you removed previously. Make the setup according to "SCSI BIOS" in Chapter 3. Removal Remove the backup device in reverse order of the installation steps. 180 Upgrading Your NEC Storage...
100 to 120 VAC ±10%, 200 to 240 VAC ±10%, 50/60 Hz ±1 Hz Power supply Power consumption (maximum) 360 VA, 350 W Environnement Temperature 10 to 35°C al requirements Humidity 20 to 80% RH (no condensation) Others NEC STORAGE NS420 Recovery CD supported, NEC ESMPRO provided in the standard configuration...
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Appendix B Interrupt Requests The factory-set interrupt requests are listed below. Find an appropriate one to install an optional device. Peripheral Device (Controller) Peripheral Device (Controller) System timer Real-time clock Keyboard PCI/SCI Cascaded connection COM2 serial port (PCI) ESMINT/PCI COM1 serial port (PCI) Mouse PCI/LPT2 parallel port Numeric processor...
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Place the CD in the CD drive and boot the NAS server. RECOVERY CD STEPS: The NS420 Recovery CD is fully automated. The floppy can contain a configuration file (SYSPREP.INF) file generated with the "NEC Storage NS Series / Configuration utility" present in the \UTIL directory of this CD. •...
186 Installing and Configuring Windows 2000...
Appendix D Product Configuration Record Table Use this table for information about setup and system environment change. Hardware Main Unit Model name Serial No. Date Installed Clock Serial No. Date Installed Clock Serial No. Date Installed Memory #1A, #1B Size Serial No.
Backup Device Slot 1 Size Capacity Serial No. Model name Type number Date Installed PCI Slot #1B Model name Serial No. Date Installed PCI Slot #2B Model name Serial No. Date Installed PCI Slot #3B Model name Serial No. Date Installed PCI Slot #1C Model name Serial No.
Software Firmware version Name: Version: Application of RUR media Apply Name: Version: File system HPFS NTFS Others ( Bundled software installed Licensed software installed Application running when a failure occurred Product Configuration Record Table 189...
Specifications ......................181 Interrupt Requests......................183 Re-installing Windows 2000 on your NEC Storage NS420........185 How to run the Recovery CD: ....................185 Recovery CD steps: ........................185 Product Configuration Record Table.................187 Hardware ..........................187 Software..........................189 (This page is intentionally left blank.)
Glossary (Alternating Current) The type of current available in wall outlets. All computers must convert alternating current to direct current to operate. See also DC. address A label, name, or number that identifies a location in computer memory. ASCII (American Standard Code for Information Interchange) A standard number assigned to each of the alphanumeric characters and keyboard control code keys to enable the transfer of information between different types of computers and peripherals.
(Baseboard Management Controller) Contains all of the server management functions. One major function of the BMC is to monitor system management events and log their occurrence in the System Event Log (SEL). boot The process of loading the operating system into memory. (bits per second) The number of bits transferred in one second during serial communication, such as modem transmission.
(Direct Current) The type of current available in the rechargeable battery packs used in portable computers. See also AC. default The factory setting your computer uses unless you instruct it otherwise. For example, when powering up, the computer will boot from the default drive. density The capacity of information (bytes) that can be packed onto a storage device, such as a floppy disk.
EPROM (Erasable Programmable Read-Only Memory) A type of memory device that is usually used to store system BIOS code. This code can be erased with ultraviolet light, but is not lost when the computer is powered off. See also flash EPROM and ROM. expansion slot See backplane slot.
(Integrated Drive Electronics) A type of hard disk drive with the control circuitry located inside the disk drive rather than on a drive controller card. interface. A connection between the computer and a peripheral device that enables them to exchange data. See also parallel port and serial port. (Industry Standard Architecture) An industry standard for computers and circuit cards that transfer 16 bits of data at a time.
microprocessor The integrated circuit that processes data and controls the basic functions of the computer. modem A device used to exchange information with other computers over telephone or data lines. module A circuit board that plugs into a dedicated connector on the system board in your computer.
operating system A set of programs that provides the interface between other software programs and the computer. parallel port The connector on the back of your computer that allows the transfer of data between the computer and a parallel device, such as a parallel printer. partition The process of dividing the storage space on a hard disk into separate areas so that the operating system treats them as separate disk drives.
(Random-Access Memory) A temporary storage area for data and programs. This type of memory must be periodically refreshed to maintain valid data, and is lost when the computer is powered off. See also NVRAM and SRAM. real-time clock The IC in your computer that maintains the time and date. (Read-Only Memory) A type of memory device that usually is used to store system BIOS code.
SRAM (Static RAM) A temporary storage area for data and programs. This type of memory does not need to be refreshed, but it is lost when the computer is powered off. See also NVRAM and RAM. SVGA (Super VGA) A type of video display system that provides very high-resolution text and graphics on analog color monitors.
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