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Quantum SNC 4500 User Manual

Quantum snc 4500: user guide
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SNC
450x User's Guide
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ADVANCED DIGITAL INFORMATION CORPORATION
www.adic.com

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Summary of Contents for Quantum SNC 4500

  • Page 1 450x User’s Guide ® ADVANCED DIGITAL INFORMATION CORPORATION www.adic.com...
  • Page 2  Copyright © 2003-2004 ADIC The information contained in this document is subject to change without notice. This document contains proprietary information which is protected by copyright. All rights are reserved. No part of this document may be photocopied, reproduced, or translated to another language without prior written consent of ADIC. ADIC shall not be liable for errors contained herein or for incidental or consequential damages (including lost profits) in connection with the furnishing, performance or use of this material whether based on warranty, contract, or other legal theory.

  • Page 3: Table Of Contents

    Cabling the SNC 4500 to the Scalar 100: Four or Six LTO-1 or SDLT Drives ....12 Cabling the SNC 4500 to the Scalar 100: Four or Six LTO-2 Drives......15 Connecting to the Serial Port.
  • Page 4 4 Configuring the SNC Opening an SNC Manager Session ........... 25 Changing the Default Username and Password .
  • Page 5 Removing the SNC 4500........
  • Page 6 Contents...

  • Page 7: Introduction

    SCSI over IP (iSCSI) connectivity unit used with the Scalar 100. The SNC 4501 is an iSCSI unit mounted internally in the Scalar 24. Both units support Gigabyte Ethernet speeds. This document uses SNC 450x to refer collectively to the SNC 4500 and the SNC 4501. Intended Audience This guide is intended for operators, administrators, and maintenance personnel who interact with the SNC 4500 and SNC 4501 hardware.

  • Page 8: Environmental Notices And Statements

    Environmental Notices and Statements Environmental notices and statements that relate to the SNC 450x include the following: Product Recycling This unit contains recyclable materials that must be recycled according to local regulations wherever processing sites are available. Electrostatic Discharge (ESD) ESD is a sudden flow of electric current through a material that is normally an insulator.

  • Page 9: Snc Description

    A US and European power cable are provided. The SNC 4501 receives power directly from the Scalar 24. The SNC 4500 is installed externally to the Scalar 100 in standard 19" racks or free standing near the library. The SNC 4501 is integrated into the Scalar 24.

  • Page 10: Ethernet Ports

    The two independent 10/100/1000 Ethernet RJ45 data ports support TCP/IP-based data transfer. These two ports are also referred to as “dp0” and “dp1.” They are labeled Ethernet ports 0 and 1 on the SNC 4500 Figure 1...

  • Page 11: Serial Port

    The RS-232 serial port is an RJ-11 connection used to connect this port to the serial port on a service computer. The position of the RS-232 serial port on an SNC 4500 can be seen in position of the RS-232 serial port on an SNC 4501 is shown in...

  • Page 12: Power

    For the SNC 4500, air enters through the slots in the rear panel and exits through the blower on the far end of the rear panel. • Humidity: 10 to 90% non-condensing Power The SNC 4501 is powered by the Scalar 24.

  • Page 13: Getting Started

    • Your host system can use any of three different types of cards: a network interface card (NIC), a TCP/IP offload engine card (TOE), or a storage network interface card (SNIC). • Obtain the SNC driver file, "SNC Null Driver for Windows 200X", from www.adic.com. Unpack the ZIP file to a temporary directory on your host.

  • Page 14: Installing The Snc

    Installing the SNC The SNC 4500 is installed on a desktop or in a rack near the Scalar 100. The SNC 4501 is installed directly into the rear of the Scalar 24. Installing the SNC 4500 on a Desktop Place the SNC 4500 on a desktop near the Scalar 100.

  • Page 15: Installing The Snc 4501

    Fasten the SNC with the brackets to one side of the rack’s rail pairs using 10/32 pan head screws with lock and flat washers (not provided). Repeat on the other side. Connect the SNC AC power cord from the SNC to the proper AC source outlet. The SNC should be left on to keep the battery charged.
  • Page 16 Loosen the four thumbscrews on the cover plate and remove the cover plate. Store the cover plate in a convenient place. You must replace it later for proper Note operation and cooling of the library if the SNC is removed. Getting Started...

  • Page 17: Connecting The Scsi Ports

    Because each bus is independent, each bus is capable of supporting 15 devices and transfer rates of 40, 80, or 160 MB/sec. (Ultra, Ultra2, or Ultra3). When using a SNC 4500 or SNC 4501, one tape drive per SCSI bus is recommended for the Scalar 24 and two tape drives per bus is recommended for the Scalar 100.

  • Page 18: Cabling The Snc 4501 To The Scalar 24

    Figure Figure 3 Scalar 24 with Two LTO-1/LTO-2 or SDLT Drives Cabling the SNC 4500 to the Scalar 100: Four or Six LTO-1 or SDLT Drives Turn off the library and SNC, if they are on. Use a maximum cable length of 6m (20 ft) for LVD devices.
  • Page 19 Use a jumper cable to connect drive 3 to drive 4. Terminate drive 4. Connect sb1 on SNC 1 to drive 1. Use a jumper cable to connect drive 1 to drive 2. Terminate drive 2. Figure 4 on page 14. Stop here if you have only four LTO-1 or SDLT drives. If you have six LTO-1 or SDLT drives, proceed to Step 10 Connect sb0 on SNC 2 to drive 5.
  • Page 20 Figure 4 Scalar 100 with Four LTO-1 or SDLT Drives Getting Started...

  • Page 21: Cabling The Snc 4500 To The Scalar 100: Four Or Six Lto-2 Drives

    Figure 5 Scalar 100 with Six LTO-1 or SDLT Drives Cabling the SNC 4500 to the Scalar 100: Four or Six LTO-2 Drives Turn off the library and SNC, if they are on. Use a maximum cable length of 6m (20 ft) for LVD devices.
  • Page 22 Connect sb0 on SNC 1 to the library controller. Connect the library controller to drive 1. Terminate drive 1. Connect sb1 on SNC 1 to drive 2. Terminate drive 2. Connect sb0 on SNC 2 to drive 3. Terminate drive 3. 10 Connect sb1 on SNC 2 to drive 4.
  • Page 23 Figure 6 Scalar 100 with Four LTO-2 Drives SNC 450x User’s Guide...

  • Page 24: Connecting To The Serial Port

    Figure 7 Scalar 100 with Six LTO-2 Drives Connecting to the Serial Port Use the serial port to log on and configure the Ethernet ports. You must have completed the previous installation steps before you configure Note the serial port. Getting Started...
  • Page 25 Serial Connector on the SNC 4501 If you are using an SNC 4500 with a Scalar 100 and the library is off, turn on the library. After about 15 seconds, when the library has finished booting, turn on the SNC. If you are using the SNC 4501, just turn on the library.
  • Page 26 • Terminal type: ASCII • Echo: on c. Click OK. After you connect to the SNC, you can see the following start-up messages. These messages are only displayed at start-up. Messages actually displayed by your SNC will differ slightly from the sample message printed below.

  • Page 27: Connecting To The Ethernet Management Port

    Bridge Serial Number Bridge Name Internal Temperature = 25 C [0 - 70] For help, type HELP. Active Configuration = ADIC Config File 4 2004 14:06:50 A61Z Initialization Complete Scsi interface 0 Register R/W test Scsi interface 0 Reset test Scsi interface 0 FIFO test Scsi interface 0 Master test Scsi interface 1 Register R/W test...
  • Page 28 Figure 1 on page 4 and Figure 2 • Obtain appropriate IP addresses, gateways and subnet masks from CAUTION your network administrator. • The recommended configuration is one where DHCP has been disabled. • You must substitute a valid IP address for the IP address used in the example.

  • Page 29: Completing The Installation

    Completing the Installation To complete the installation, continue with the configuration steps. Refer to • You must have completed the previous procedures in this chapter before you Note complete the installation. • Other special configurations may be required, for example when setting up an iSNSServer or iSCSIChapSecrets.
  • Page 30 Getting Started...

  • Page 31: Configuring The Snc

    Opening an SNC Manager Session SNC Manager is the recommended management tool for the SNC 4500 and SNC 4501. It is a web-based graphical user interface (GUI) that allows you to manage the SNC by clicking choices and commands in traditional GUI fashion or by entering CLI commands directly, as you would in a terminal emulation session.

  • Page 32: Changing The Default Username And Password

    Changing the Default Username and Password It is best practice to change the default username and password after CAUTION you have configured your SNC. If you do so, record the new username and password in a convenient place. If you have not already, open an SNC Manager session. For instructions, refer to Opening an SNC Manager Session Click Bridge.

  • Page 33: Naming The Snc

    Naming the SNC If you have not already, open an SNC Manager session. For instructions, refer to Opening an SNC Manager Session Choose a name for the SNC. Go to the Bridge Configuration page and type in a name in the text box provided to identify your SNC.
  • Page 34 Fill in appropriate values for the data ports IP addresses, gateways, and subnet masks. Consult your service representative before changing the Ethernet CAUTION speed values or the MTU (Maximum Transmission Unit) values. Click Submit. Click the Restart button in the side bar. Then click Restart. If the host and SNC are on different subnets, ping may return CAUTION "Destination Net Unreachable."...

  • Page 35: Mapping

    The device map is persistent across reboots, so storage will always be presented at the same LUN ID until the map is adjusted. If a storage device is off-line when device discovery occurs, its LUN ID will be reserved so that when it comes back online, it will retain the same ID. When adding new storage devices, the device map needs to be redefined.

  • Page 36: Mapping Devices Automatically

    • Changing the device map can affect the host’s view of devices and your Note application configuration. • If the SCSI devices are not cabled or terminated properly, they may not show up in the mapping. • SCSI devices mapped by the SNC are visible through both data ports. This allows library devices to be accessed on either data port when both data ports are connected to the IP SAN.

  • Page 37: Other Ways Of Connecting To And Monitoring The Snc

    • Ensure the SNC is mapped to iSCSI LUN 0. • Map the SCSI devices with sequential IDs starting at 0 for each device. Click Submit. All the CLI commands necessary to enable mapping and the command norestart will be performed. •...
  • Page 38 port type:telnet terminal type: vt100 Enter the default values for the username, “admin”, and the password, “Password”, if you did not set new values in Connecting to the Ethernet Management Port The username and password are case sensitive. Note username:admin password:Password Enter the appropriate CLI management commands.

  • Page 39: Updating Firmware

    Several processors control the flow of data in the SNC. The firmware to control these processors can easily be upgraded in the field using the PUT command from an FTP connection or ZModem utility over a serial connection to overwrite the previous firmware with new firmware. The SNC firmware is distributed as a compressed ZIP file.

  • Page 40: Updating Firmware Using Zmodem

    Use the PUT command to download the firmware from the directory on your personal computer determined in Step 1. For example: ftp > put c:\SNC_firmware\I2500110.ima Press Enter. DO NOT INTERRUPT THE UPDATE PROCESS. DO NOT TURN OFF CAUTION THE PERSONAL COMPUTER OR THE SNC UNTIL READY IS RETURNED AT THE END OF THE UPDATE.

  • Page 41: Using The Snc Manager Interface

    Using the SNC Manager Interface SNC Manager is a monitoring and configuration tool accessible through a web browser. Platform independent, SNC Manager contains all the current capabilities of the CLI in a user-friendly GUI interface. A menu provides access to various pages for information and configuration operations. For instructions on accessing SNC Manager, refer to Opening an SNC Manager Session on page 25.

  • Page 42: Checking Status

    Figure 11 SNC Manager Status Page Each page in the SNC Manager interface provides information and configuration parameters based on a specific element. Each page can be reached through the menu at the left side of each page. Checking Status The Status page displays SNC information which is usually found in the POST or after using an Info command in the CLI.

  • Page 43: Configuring The Serial Port

    Configuring the Serial Port You can configure the serial port using the Serial Port Configuration page. • Baud rate • Echo Configuring the Time and Date You can configure the real-time clock or access a remote time server using the Time & Date Configuration page.

  • Page 44: Configuring Iscsi

    • Port bus speed • Synchronous transfer • Wide transfer • Initiator ID • Bus reset on startup • Bus termination • SCSI port reset Configuring iSCSI Consult your service representative before making changes to the CAUTION default settings. The iSCSI Configuration page allows you to configure iSCSI parameters. You can configure the following options: •...

  • Page 45: Configuring Advanced Properties

    Configuring Advanced Properties The Advanced CLI configuration page allows you to input any CLI command available through the SNC. Refer to Management Port Command Reference CLI commands are case insensitive. You can type all upper or all lower Note case or a mixture. Upper and lower case in this guide and the Help screen are for clarification only.
  • Page 46 Using the SNC Manager Interface...

  • Page 47: Troubleshooting

    Then go to that event and continue troubleshooting. Visually Inspect LEDs Light Emitting Diodes (LEDs) are located on both sides of the SNC 4500 and on the front of the SNC 4501. • For the position of these LEDs on the SNC 4500, see...
  • Page 48 LED flashes. The Fault LED also flashes briefly during start up. For more information, refer to Inspect LEDs on page 41. Figure 12 LEDs on the Front of the SNC 4500 Table 1 LEDs on the Front of the SNC 4500 Ethernet speed LED...
  • Page 49 Figure 13 LEDs on the Back of the SNC 4500 Table 2 LEDs on the Back of the SNC 4500 Ethernet activity LEDs Ethernet activity LED Ethernet speed LEDs Ethernet speed LED Fault LED Fault LED SCSI bus activity LED...

  • Page 50: Check For Problems On Attached Devices

    Table 3 LEDs on the SNC 4501 Ethernet activity LEDs Ethernet activity LED Ethernet speed LEDs Ethernet speed LED SCSI bus activity LED Fault LED Fault LED Each SCSI bus has its own LED to show activity on that bus. The LED blinks when I/O is occurring and is solid when there is heavy activity.

  • Page 51: Component Check

    Start SNC Manager. To start and use the interface, including how to access the version information, refer to Manager Interface on page 35. If an update is needed, download the update from www.adic.com. Refer to Updating Firmware on page 33. Component Check Use this procedure to check system components.

  • Page 52: Checking The Serial Port

    When changing any setting on the SNC the configuration must be saved by using either the saveConfiguration CLI command or through the SNC Manager interface. Checking the Serial Port Verify you have the correct settings and that your terminal is configured to: •...

  • Page 53: Checking The Lan/Wan

    Checking the iSCSI Host Adapter or NIC iSCSI host adapters appear as a type of Storage Controller to the host OS, not as a standard NIC. These adapters usually have hardware acceleration to offload the TCP processing from the host. Configuration of these adapters is usually done through the vendor’s own utility and not through the OS itself.

  • Page 54: Checking The Operating System

    Verify that the iSCSI OS is still looking for the SNC at the right IP address. If using DHCP, verify that the DHCP server is assigning the correct IP information to the host. Refer to Ethernet Ports on page 4. Verify that the NIC is configured with the correct IP information.

  • Page 55: Checking The Snc Ethernet Ports

    Checking the Ethernet Host Adapter or NIC Ethernet Storage Adapters generally outperform accelerated NICs and un-accelerated NICs by offloading most of the processing from the host. An accelerated NIC provides some offloading, but still requires a host OS iSCSI driver, making the host spend more CPU cycles.

  • Page 56: Checking The Host System

    RAID volume across the country, or other applications, slows the system no matter how fast everything else is in the system. Verify that the iSCSI storage adapter or NIC is connected to the fastest PCI bus connector supported by the adapter or NIC.

  • Page 57: Management Port Command Reference

    Management Port Command Reference All available commands are listed alphabetically beginning on group in Table 6 on page 52. References from the table connect you to an explanation of the command in the alphabetical list. Using the Command Line Interface (CLI) CLI commands are case insensitive.
  • Page 58 Table 4 Commands not Preceded by "Get" or "Set" automap clearEventLog clearTraceLog displayEventLog displayTraceLog dumpEventLog dumpTraceLog exit 1 Special troubleshooting command. Use with ATAC guidance. The arguments to many commands in this guide are represented by the abbreviations listed in Table 5 Abbreviations Used by the CLI Abbreviation...
  • Page 59 Table 6 Alphabetical Listing of Commands by Functional Group Command get Date get MaxOpTemp get MinOpTemp get OpTempWarn get SNTP get SNTPServer get Time get TimeZone get Username reserve SCSIPortReset set BridgeName set Date set MaxOpTemp set MinOpTemp set OpTempWarn set Password set SNTP set SNTPServer...
  • Page 60 Table 6 Alphabetical Listing of Commands by Functional Group Command displayTraceLog dumpEventLog dumpTraceLog get BridgeModel get DisplayEventLogFilter get DisplayTraceLogFilter get EventLog get EventLogFilter get IdentifyBridge get Temperature get TraceLog get TraceLogFilter get Voltage get WrapEventLog get WrapTraceLog info isReserved SCSITargets set DisplayEventLogFilter set DisplayTraceLogFilter set EventLog...
  • Page 61 Table 6 Alphabetical Listing of Commands by Functional Group Command get SCSIPortSyncTransfer get SCSIPortTermination get SCSIPortWideTransfer get SpeedWrite get SpeedWriteDefault SCSIPortList set SCSIInitId set SCSIPortBusSpeed set SCSIPortResetOnStartup set SCSIPortSyncTransfer set SCSIPortTermination set SCSIPortWideTransfer set SpeedWrite set SpeedWriteDefault iSCSI Configuration Commands get iSCSIAlias get iSCSIChap get iSCSIChapSecret...
  • Page 62 Table 6 Alphabetical Listing of Commands by Functional Group Command Ethernet Configuration Commands exit get DPMTU get EthernetSpeed get IPAddress get IPDHCP get IPGateway get IPSubnetMask ping set DPMTU set EthernetSpeed set IPAddress set IPDHCP set IPGateway set IPSubnetMask set Password set Username Serial Port Configuration Commands get SerialPortBaudRate...

  • Page 63: Alphabetical Listing Of Commands

    Alphabetical Listing of Commands autoMap The automap command automatically assigns iSCSI LUNs to a subset of SCSI target destination devices visible to the SNC. Existing valid maps are not deleted. The following example shows a sequence of three commands. The first command is the routeDisplay command.
  • Page 64 The clearEventLog command clears the contents of the event log. No events are recorded until the command has been completed. This command takes effect immediately. Ready. cleareventlog Ready. clearTraceLog Contact ATAC before using this command. CAUTION The clearTraceLog command clears the contents of the trace log. No events are recorded until the command has been completed.This command takes effect immediately.
  • Page 65 DisplayEventLog [ + | - | = | <ESC>] >> + 0132 10/07/2003 14:32:00 Voltage VCC Warning Level reached at 4.72 Volts 0133 10/07/2003 15:00:02 Rx Packet Error. Net #2 0134 10/08/2003 08:00:39 Bridge was booted/reset. 0135 10/08/2003 08:00:48 Unable to connect to an SNTP server 0136 10/08/2003 08:01:49 Voltage VCC Warning Level reached at 4.72 Volts DisplayEventLog [ + | - | = | <ESC>] >>...
  • Page 66 0612 12/10/2003 11:25:22 Bus = 0 Target ID = 1 0613 12/10/2003 11:25:22 Bus = 0 Target ID = 1 0614 12/10/2003 11:25:22 Bus = 0 Target ID = 1 0615 12/10/2003 11:25:22 Bus = 0 Target ID = 1 0616 12/10/2003 11:25:22 Bus = 0 Target ID = 1 0617 12/10/2003 11:25:22 Bus = 0 Target ID = 1 DisplayTraceLog [ + | - | = | <ESC>] >>...
  • Page 67 0239 12/13/2003 09:43:25 Rx Packet Error. Net #0 0240 12/13/2003 09:43:25 QueueFull. 0241 12/13/2003 09:43:25 Rx Packet Error. Net #0 0242 12/13/2003 09:43:25 QueueFull. 0243 12/13/2003 09:43:25 Rx Packet Error. Net #0 0244 12/13/2003 09:43:25 QueueFull. 0245 12/13/2003 09:43:25 Rx Packet Error. Net #0 0246 12/13/2003 09:43:25 QueueFull.
  • Page 68 Ready. exit The exit command ends the current TCP/IP CLI session. It has no effect if used during a serial CLI session. A Telnet session ends after 15 minutes of inactivity. No more than three Telnet sessions can be active at one time.
  • Page 69 Firmware version A61Z release date Feb Power-On Self-Test Completion Status: GOOD 128 Megabytes of RAM Installed. 2 GbE Data Port(s). 2 LVD SCSI Interface Port(s). Bridge World Wide Name = 20 00 00 10 86 50 00 1C Bridge Serial Number Bridge Name Internal Temperature = 25 C [0 - 70] For help, type HELP.
  • Page 70 Ready. get date Date = 11/11/2003 Ready. get DisplayEventLogFilter [subsystem] [level] Contact ATAC before using this command. CAUTION The get DisplayEventLogFilter command displays the filters enabled for specific SNC subsystems when in DisplayEventLog mode. Refer to Subsystem Choices ENET NVRAM Where: GEN = General...
  • Page 71 ENET CRIT ENET FAIL XCOPY INFO XCOPY WARN disabled XCOPY CRIT XCOPY FAIL NVRAM INFO NVRAM WARN disabled NVRAM CRIT NVRAM FAIL INFO disabled WARN disabled CRIT FAIL PERF INFO disabled PERF WARN PERF CRIT PERF FAIL INFO WARN disabled CRIT disabled FAIL disabled Ready.
  • Page 72 The get DPMTU command shows the MTU (Maximum Transmission Unit) used by SNC data ports. Refer iSCSI Performance Tuning on page 107 and Port Number Meaning dp0 or dp1 Ethernet connection labeled Ethernet port 0 or Ethernet port 1 All Ethernet connections The following is a verbose output for the command get DPMTU all: Ready.
  • Page 73 get EventLog Filter [subsystem] Contact ATAC before using this command. CAUTION The get EventLogFilter command displays the data for specific SNC subsystems. Refer to EventLogFilter [subsystem] [event level] [status] Subsystem Choices ENET ISCSI Where: GEN = General ENET = Ethernet ISCSI = SCSI protocol of TCP/IP NVRAM =...
  • Page 74 ; Port Address ;================================= 172.16.5.50 172.16.5.51 172.16.5.198 Ready. get IPDHCP [port number] The get IPDHCP shows if DHCP has been enabled or disabled for any or all SNC Ethernet ports. Refer to set IPDHCP [port number] [status] Port Number Meaning Ethernet management port labeled Ethernet port 2 dp0 or dp1 Ethernet data port labeled Ethernet port 0 or Ethernet port 1...
  • Page 75 get IPSubnetMask [port number] The get IPSubnetMask command reports the current subnet mask, whether it is the default setting, or whether it was assigned manually or by DHCP. Refer to set IPSubnetMask [port number ] [IP address] Port Number Meaning Ethernet management port labeled Ethernet port 2 dp0 or dp1 Ethernet data port labeled Ethernet port 0 or Ethernet port 1...
  • Page 76 get iSCSIChapSecret [password type | delete] [account name] The get iSCSIChapSecret command displays the incoming and outgoing secrets (passwords) for iSCSI CHAP sessions. Refer to set iSCSIChapSecret [password type|delete] [account name] <secret> Password Type Meaning Defines the incoming secret (password) for iSCSI CHAP sessions Defines the outgoing secret (password) for iSCSI CHAP sessions delete Removes a secret (password) from an account (username) list...
  • Page 77 get iSNSServer Contact ATAC before using this command. CAUTION The get iSNSServer specifies the IP address of a valid iSNS server the SNC uses to discover iSCSI initiators. Refer to set iSNSServer [IP address] Ready. get isnsserver iSNSServer = 0.0.0.0 Ready.
  • Page 78 get ScsiInitID [port number] [ID choices] Contact ATAC before using this command. CAUTION The get SCSIInitID command displays the SCSI initiator ID to be used for a specific port. You must put in a placeholder value for the initiator value used on that port, [0-15], even though the output could differ from the number you enter.
  • Page 79 Ready. get SCSIPortResetOnStartup [port number] Contact ATAC before using this command. CAUTION The get SCSIPortResetOnStartup command displays the current status of the SCSI port reset on startup parameter for a specific port. The default setting is “enabled." Refer to number] [status] on page 95.
  • Page 80 get SCSIPortWideTransfer [port number] Contact ATAC before using this command. CAUTION The get SCSIPortWideTransfer command specifies if wide SCSI transfers are negotiated for a specific port. Refer to set SCSIPortWideTransfer [port number] [status] by saveConfiguration restart. Port Number Meaning 0 or 1 SCSI connection labeled SCSI port 0 or SCSI port 1 Ready.
  • Page 81 Ready. get SNTPserver ;SNTP Server IP Addresses ;======================== 192.43.244.18 129.6.15.28 AUX 132.163.4.101 AUX Ready. get SpeedWrite SCSI [bus target LUN] Contact ATAC before using this command. CAUTION The get SpeedWrite [sb st sl | all] command shows whether or not SpeedWrite has been enabled for a specific SCSI bus (sb), target (st), and LUN (sl) or for all currently mapped SCSI devices on the SNC.
  • Page 82 The get SpeedWriteDefault command shows if SpeedWrite performance has been enabled or disabled for newly-mapped SCSI devices. For an explanation of the SpeedWrite capability, refer to [sb st sl | all] [status] on page 98. Output Meaning enabled Provides enhanced performance of WRITE commands for newly-mapped SCSI devices disabled Retains the current level of performance of WRITE commands...
  • Page 83 Output Meaning disabled No SCSI traffic is recorded to the Trace Log Ready. get tracelog TraceLog = disabled Ready. get TraceLogFilter [SCSI | all] [port number] Contact ATAC before using this command. CAUTION The get TraceLogFilter command displays the information in the trace log for specific SNC ports if the set TraceLog command has been enabled.
  • Page 84 get Voltage The get Voltage command displays the current level of voltages monitored by the SNC. There is no set version of this command. Ready. get voltage ;Voltage Level ;====================== Voltage (VCC) = 4.95 V Voltage (VDDA) = 3.31 V Voltage (VDDB) = 2.48 V Ready.
  • Page 85 Meaning Ethernet management port labeled Ethernet port 2 dp0 or dp1 Ethernet data port labeled Ethernet port 0 or Ethernet port 1 SNC 450x User’s Guide = "SNC 4500" = IPB2500100000 = 055E = 055E = "Oct 3 2003" 11:30:32 = 11 = 1.10...
  • Page 86 IP Address Meaning xxx.xxx.xxx.xxx The IP address you wish to ping Optional Parameters Meaning count Specifies the number of echo requests sent size Specifies the length, in bytes, of the data sent Ready. ping mp0 172.16.5.198 PING: size=64; num=4; net=MP0; addr=c60510ac 1 no reply 2 no reply 3 no reply...
  • Page 87 Status Meaning Default Factory-set default configuration Saved Last saved configuration The following example shows the response to restoreConfiguration default: Ready. restoreconfiguration default Ready. route iSCSI [lun] [SCSI | delete] <SCSI btl> The Route iSCSI command assigns an iSCSI LUN protocol address to a target destination device. More than one iSCSI LUN can be assigned to a SCSI BTL (bus, target, LUN).
  • Page 88 Bridge Ready. routeDisplay iSCSI <lun> The routeDisplay iSCSI command displays a list of iSCSI names to SCSI bus, target, and LUN mappings. The optional LUN parameter limits the list to the map of that LUN. Ready. routeDisplay iscsi ;Lun SB ST SL ;=================== 0 Bridge 1 0 0 0...
  • Page 89 Restart is necessary... Do you wish to restart (y/n)? y Restarting...] Ready. SCSIPortList The SCSIPortList command outputs available SCSI ports and their current status. Valid status values are “O.K.” and “failed." This command takes effect immediately. Ready. scsiportlist ;SCSI Port Port Status ;======================== O.K.
  • Page 90 Ready. set bridgename Alpha Ready.* set Date [date] The set Date [mm|dd|yyyy] command sets the date for the SNC if NTP has been disabled. Refer to SNTP [status] on page 97 and get Date Date format Meaning Two-digit designation of desired month Two-digit designation of desired day yyyy Four-digit designation of desired year...
  • Page 91 Log Level Choices INFO WARN CRIT Where: INFO = Information WARN = Warnings CRIT = Critical events FAIL = Failures ALL = All of the above Status Meaning enabled The subsystem and log level chosen are masked when in DisplayEventLog mode disabled The subsystem and log level chosen are shown when in DisplayEventLog...
  • Page 92 set DPMTU [port number] [MTU choices] Increasing the MTU can improve performance. To fully understand the CAUTION implications and network requirements, contact your service representative before modifying this value. The set DPMTU command controls the MTU (Maximum Transmission Unit) used by the SNC data ports. Increasing the MTU on the SNC can improve throughput on the SNC data ports.
  • Page 93 Ethernet Speed Choices 1000 auto Ready. set ethernetspeed dp0 auto Ready. * set EventLog [status] Contact ATAC before using this command. CAUTION The set EventLog command, when enabled, records various system events to the event log. The default setting is “enabled." Refer to get EventLog saveConfiguration norestart.
  • Page 94 ECC = Error Correcting/Correction Code ALL = All of the above Log Level Choices INFO WARN CRIT Where: INFO = Information WARN = Warnings CRIT = Critical events FAIL = Failures ALL = All of the above Status Meaning enabled The subsystem and log level chosen are masked during event logging disabled The subsystem and log level chosen are shown during event logging...
  • Page 95 Port Number Meaning Ethernet management port labeled Ethernet port 2 Ready. set ipaddress DP0 172.16.5.198 Ready.* set IPDHCP [port number] [status] When enabled, set IPDHCP allows the SNC to acquire its IP address from a network DHCP (Dynamic Host Configuration Protocol) server. The network must have at least one DHCP server. When disabled, the SNC uses the default IP address unless changed through the CLI.
  • Page 96 set IPSubnetMask [port number] [IP address] The IPSubnetMask command controls the current subnet mask if DHCP is not enabled where the string xxx.xxx.xxx.xxx is the subnet mask. The default setting is “255.255.0.0." Refer to number] on page 69. This command must be followed by saveConfiguration restart. Port Number Meaning Ethernet management port labeled Ethernet port 2...
  • Page 97 Secrets are case sensitive, 12-32 characters, or 16-32 characters for Microsoft iSCSI initiators, and cannot contain spaces. Incoming and outgoing secrets must be different. An incoming CHAP secret authenticates the iSCSI initiator to the SNC. The SNC can store up to 32 incoming secrets, each with a unique account name, equivalent to a username, and secret (password) pair.
  • Page 98 set iSNSLoginControl [status] Contact ATAC before using this command. CAUTION The set iSNSLoginControl command specifies whether or not the SNC delegates its access control and authorization to an iSNS server. The default setting is “disabled.” Refer to page 92 and get iSNSLoginControl Status Meaning...

  • Page 99: Set Password

    set MinOpTemp [temperature] Contact ATAC before using this command. CAUTION The set MinOpTemp command sets the minimum internal operating temperature of the SNC in degrees Celsius. If the internal temperature of the SNC falls below the minimum operating temperature, thermal control event handling occurs.
  • Page 100 Because the Ready prompt is followed by an asterisk, you must issue the command to complete the change. set SCSIInitID [port number] [ID choices] Contact ATAC before using this command. CAUTION The set SCSIInitID command specifies the SCSI initiator ID to be used on the specified SCSI port. All maps coinciding with the user-specified SCSIInitID must be set to offline and becomes invalid upon issuing this command.
  • Page 101 set SCSIPortResetOnStartup [port number] [status] Contact ATAC before using this command. CAUTION The set SCSIPortResetOnStartup command specifies if the SCSI port is reset after turning the unit on or restarting the firmware. The default setting is “enabled.” Refer to number] on page 73.
  • Page 102 The set SCSIPortTermination configures the SCSI internal termination of the SCSI port. A saveConfiguration restart command must be used to permanently save this configuration. The default setting is “enabled." Refer to get SCSIPortTermination [port number] Port Number Meaning 0 or 1 SCSI connection labeled SCSI port 0 or SCSI port 1 Status Meaning...
  • Page 103 Ready. set serialportbaudrate 57600 Ready.* set SerialPortEcho [status] The set SerialPortEcho command enables or disables repetition of keyboard input on the screen. When enabled, all non-control character keyboard input is output to the display. Set the local ASCII terminal (or terminal emulator) echo settings to disabled if using set SerialPortEcho enabled.
  • Page 104 Possible IP Addresses Meaning 129.6.15.28 time server at www.time-a.nist.gov 132.163.4.101 time server at www.time-a-timefreq.bidrdoc.gov The following example determines the current NTP server, then changes it to a different server. The first server is no longer listed. Ready. get sntpserver ;SNTP Server IP Addresses ;======================== 192.43.244.18 129.6.15.28...
  • Page 105 Status Meaning enabled Provides enhanced performance of WRITE commands disabled Retains the current level of performance of WRITE commands Ready. set speedwrite scsi all enabled Ready. set SpeedWriteDefault [status] Contact ATAC before using this command. CAUTION When the set SpeedWriteDefault command is enabled, any newly-mapped SCSI device are set at the SpeedWrite performance level.
  • Page 106 Ready. set time 14:40:10 Ready. get time Time = 14:40:10 Ready. set TimeZone [zone] [+/-:hh:mm] The Set TimeZone command controls the time zone for the SNC. Choices are EST, CST, MST, PST or a numerical offset from GMT (Greenwich Mean Time) in the form +/-:HH:MM. When NTP is enabled using the SNTP command, the SNC retrieves the time from the specified NTP time server to determine local time.
  • Page 107 The set TraceLogFilter command filters the data for specific SNC ports in the trace log for specific SNC ports if the set TraceLog command has been enabled. If the TraceLogFilter command is enabled for a particular SNC port, that port is masked when the command TraceLog is issued. The default setting is “disabled”...
  • Page 108 When the set WrapEventLog command is enabled, the SNC logs up to 2,048 event entries before wrapping (overwriting the first entries). If the set WrapEventLog command is disabled, the SNC stops logging event entries when the buffer is full. The default setting is “enabled." Refer to page 78.

  • Page 109: Removal And Replacement Procedures

    Be very careful when you work with ESD-sensitive parts in cold weather. Low humidity and heating increase static electricity. Removing the SNC 4500 Perform these procedures if a repair action is required for any component of the SNC. They could be necessary if an SNC fuse blows, or a firmware download is interrupted, or there is a hardware failure within the SNC.

  • Page 110: Replacing The Snc 4500

    Remove the cable. • Mark what the cable was connected to (for example, SNC number 3, SCSI channel 1). Replacing the SNC 4500 Remove the SNC from the protective bag. Attach the new SNC to the Scalar 100. For more information, refer to Configure the SNC.

  • Page 111: Replacing The Snc From The Scalar 24

    Replacing the SNC from the Scalar 24 Remove the SNC from the protective bag. Install the new SNC in the Scalar 24. For more information, refer to Configure the SNC. Refer to Configuring the SNC SNC 450x User’s Guide Installing the SNC on page 8.
  • Page 112 Removal and Replacement Procedures...

  • Page 113: Iscsi Performance Tuning

    The SNC 450x is intended to be operated in a Gigabit Ethernet (GbE) LAN switching environment without passing traffic through a router, gateway or WAN connection. As a result, CRCs at the Ethernet and TCP levels are not intentionally modified, and the possibility of errors injected and included in the CRC calculation is avoided.

  • Page 114: Gbe Network Switches

    Typically, each Ethernet data frame transmitted requires a calculation of all the bytes in the frame to make sure that the bytes were transmitted and received correctly. At GbE speeds, the processing power required can slow the host computer down because the main CPU is used to perform the calculations. Several Ethernet HBAs implement this calculation in hardware so that the main CPU does not have to perform the calculations, which can improve performance.

  • Page 115: Tcp/Ip Window And Buffer Sizes

    TCP/IP Window and Buffer Sizes The TCP/IP windows and buffer sizes controls the amount of data gathered together for processing. The larger the window and buffer size, the less processing power required for processing the data. Linux Configuration The configuration of these parameters is through the “/proc” interface. For example, the following shell script sets the window and I/O buffer sizes to 512K.
  • Page 116 iSCSI Performance Tuning...

  • Page 117: Regulatory Notices

    The equipment described in this manual generates and uses radio frequency energy. If this equipment is not used in strict accordance with the manufacturer's instruction, it can and may cause interference with radio and television reception. Refer to the Technical Specification sheet for a full list of certifications. FCC Standards: Radio and Television Interference This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause interference to radio communications.

  • Page 118: Class A

    Class A This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the manufacturer's instruction manual, may cause harmful interference with radio communications.

  • Page 119: Bsmi Notice

    BSMI Notice SNC 450x User’s Guide...
  • Page 120 Regulatory Notices...
  • Page 121 ATAC contacting ......2 training ......2 attached devices .
  • Page 122 Navigator ......25 Netscape Navigator ..... .25 network speed .

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