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Dell 5 series User Manual

Expandable raid controller
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Dell™ PowerEdge™ Expandable
RAID Controller 5/i and 5/E
User's Guide
Model UCP-50 and UCP-51
w w w . d e l l . c o m | s u p p o r t . d e l l . c o m

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  • Page 1 Dell™ PowerEdge™ Expandable RAID Controller 5/i and 5/E User’s Guide Model UCP-50 and UCP-51 w w w . d e l l . c o m | s u p p o r t . d e l l . c o m...
  • Page 3 Dell™ PowerEdge™ Expandable RAID Controller 5/i and 5/E User’s Guide w w w . d e l l . c o m | s u p p o r t . d e l l . c o m...
  • Page 4 Reproduction in any manner whatsoever without the written permission of Dell Inc. is strictly forbidden. Trademarks used in this text: Dell, the DELL logo, PowerEdge, PowerVault, Dell Precision, and OpenManage are trademarks of Dell Inc. MegaRAID is a registered trademark of LSI Logic Corporation. Microsoft, MS-DOS, Windows Server, and Windows are registered trademarks, and Windows Vista is a trademark of Microsoft Corporation.

  • Page 5: Table Of Contents

    Contents CAUTION: Safety Instructions ..... SAFETY: General ........SAFETY: When Working Inside Your System .
  • Page 6 Battery Management ....... Introduction to Write Cache Policy ..... Write-Back versus Write-Through .
  • Page 7 RAID Configuration and Management ....Dell OpenManage Storage Management ....
  • Page 8 BIOS Configuration Utility Menu Options ....Virtual Disk Management (VD Mgmt) ....Physical Disk Management (PD Mgmt) .
  • Page 9 PERC 5 Post Error Messages ......Red Hat Enterprise Linux Operating System Errors ....LED Behavior Patterns .
  • Page 10 Contents...

  • Page 11: Caution: Safety Instructions

    Before you remove the system covers, perform the following steps in the sequence indicated. CAUTION: Except as expressly otherwise instructed in Dell documentation, only trained service technicians are authorized to remove the system cover and access any of the components inside the system.

  • Page 12: Protecting Against Electrostatic Discharge

    In addition, take note of these safety guidelines when appropriate: • When you disconnect a cable, pull on its connector or on its strain-relief loop, not on the cable itself. Some cables have a connector with locking tabs; if you are disconnecting this type of cable, press in on the locking tabs before disconnecting the cable.

  • Page 13: Overview

    Overview The Dell™ PowerEdge™ Expandable RAID Controller (PERC) 5 family of controllers offers redundant array of independent disks (RAID) control capabilities. The PERC 5 Serial Attached Small Computer System Interface (SAS) RAID controllers support SAS devices and Dell-qualified SATA devices. The controllers provide reliability, high performance, and fault-tolerant disk subsystem management.

  • Page 14: Pci Architecture

    Microsoft Windows XP is supported with a PERC 5 controller only when the controller is installed in a Dell Precision™ workstation. NOTE: See the system documentation located at the Dell Support website at support.dell.com for the latest list of supported operating systems and driver installation instructions. RAID Description RAID is a group of multiple independent physical disks that provide high performance by increasing the number of drives used for saving and accessing data.

  • Page 15: Raid Terminology

    RAID 1 uses disk mirroring so that data written to one physical disk is simultaneously written to another physical disk. This is good for small databases or other applications that require small capacity, but complete data redundancy. RAID 5 uses disk striping and parity data across all physical disks (distributed parity) to provide high data throughput and data redundancy, especially for small random access.

  • Page 16: Parity

    Disk mirroring provides 100 percent redundancy, but is expensive because each physical disk in the system must be duplicated. Figure 1-2 shows an example of disk mirroring. NOTE: Mirrored physical disks improve read performance by read load balance. Figure 1-2. Example of Disk Mirroring (RAID 1) Stripe element 1 Stripe element 1 Duplicated Stripe element 2...

  • Page 17: Perc 5 Features

    PERC 5 Features This section describes the features of the The Dell™ PowerEdge™ Expandable RAID Controller (PERC) 5 family of controllers, such as the configuration options, disk array performance, hardware specifications, redundant array of independent disks (RAID) management utilities, and operating system software drivers.

  • Page 18: Compatibility With Virtual Disks Created On Existing Perc 5 Controllers

    The PERC 5 controllers recognize and use virtual disks created on existing PERC 5 controllers without risking data loss, corruption, redundancy, or configuration loss. Similarly, the virtual disks created on the controllers can be transferred to other PERC 5 controllers. NOTE: For more information about compatibility, contact your Dell Technical Support Representative. PERC 5 Features...

  • Page 19: Smart Technology

    For blink patterns on the Dell PowerVault™ MD1000, see the Dell PowerVault MD1000 Hardware Owner’s Manual. For blink patterns on the Dell PowerVault MD3000, see the Dell PowerVault MD3000 Hardware Owner’s Manual.

  • Page 20: Disk Roaming

    Disk Roaming The PERC 5 controllers support moving physical disks from one cable connection or backplane slot to another on the same controller. The controllers automatically recognize the relocated physical disks and logically place them in the proper virtual disks that are part of the disk group. You can perform disk roaming only when the system is shut down.

  • Page 21: Battery Management

    Battery Management The Transportable Battery Backup Unit (TBBU) is a cache memory module with an integrated battery pack that enables you to transport the cache module with the battery into a new controller. The TBBU protects the integrity of the cached data on the PERC 5/E Adapter by providing backup power during a power outage.

  • Page 22: Conditions Under Which Write-Back Is Employed

    Write-Back mode even if the battery is present and in good condition (healthy), or if a learn cycle is in process. Dell recommends that you use a power backup system when forcing Write-Back to ensure that there is no loss of data if the system suddenly loses power.

  • Page 23: Raid Configuration Information

    RAID Configuration Information Table 2-2 lists the configuration features for the PERC 5 controllers. Table 2-2. Features for RAID Configuration Specification PERC 5/E Adapter PERC 5/i Adapter and 5/i Integrated Number of virtual disks Up to 64 virtual disks per controller Up to 64 virtual disks per controller NOTE: supported The number of physical disks on a...

  • Page 24: Physical Disk Hot Swapping

    Physical Disk Hot Swapping Hot swapping is the manual substitution of a replacement unit in a disk subsystem for a defective one, where the substitution can be performed while the subsystem is running (performing its normal functions). NOTE: The backplane or enclosure must support hot swapping in order for the PERC 5 controllers to support hot swapping.

  • Page 25: Configuration

    Configuration You can use the storage management application to select the Patrol Read options. Use Patrol Read options to set automatic or manual operation, or disable Patrol Read. The following sections describe Patrol Read functions and operations available in the Storage Management application. NOTE: See the storage management application’s documentation for more information about the Patrol Read configuration features available.
  • Page 26 PERC 5 Features...

  • Page 27: Hardware Installation And Configuration

    Hardware Installation and Configuration This chapter describes how to install the Dell™ PowerEdge™ Expandable RAID Controller (PERC) 5 cards. Installing the PERC 5/E Adapter CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system.
  • Page 28 Figure 3-1. Installing a PERC 5/E Adapter bracket screw filler bracket PERC 5/E Adapter PCI-E slot 7 Tighten the bracket screw, if any, or use the system’s retention clips to secure the controller to the system’s chassis. 8 Replace the cover of the system. See your system’s Hardware Owner’s Manual for more information on closing the system.

  • Page 29: Installing The Transportable Battery Backup Unit (Tbbu) For Perc 5/E

    Installing the Transportable Battery Backup Unit (TBBU) for PERC 5/E This section describes the installation of the transportable battery backup unit (TBBU) on the PERC 5/E. CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system.

  • Page 30: Installing The Dimm On A Perc 5/E Adapter

    NOTICE: PERC 5 cards support DELL-qualified 256-MB DDRII 400MHz ECC-registered DIMMs with x16 DRAM components. Installing unsupported memory causes the system to hang at POST. 1 Remove the memory module in an antistatic environment.
  • Page 31 2 Align the memory module so that the keyed edge of the memory module is placed exactly on top of the physical divider on the memory socket of the controller to avoid damage to the DIMM. 3 Insert the memory module on the memory socket of the controller and apply a smooth, downward pressure on both ends or on the middle of the memory module until the retention clips fall into the allotted slots on either side of the memory module.

  • Page 32: Transferring A Tbbu Between Controllers

    Transferring a TBBU Between Controllers The TBBU provides uninterrupted power supply to the memory module for up to 72 hours if power supply is unexpectedly interrupted while cached data is still present. If the controller fails as a result of a power failure, you can move the TBBU to a new controller and recover the data.

  • Page 33: Removing The Dimm And Battery From A Perc 5/E Adapter

    Figure 3-5. Removing the PERC 5/E Adapter bracket screw battery memory module PERC 5/E Adapter NOTE: For more information on removing peripherals installed in the system’s PCI-E slots, see the Hardware Owner’s Manual that shipped with the system. Removing the DIMM and Battery from a PERC 5/E Adapter NOTE: The TBBU on the PERC 5/E Adapter consists of a DIMM and battery backup unit.
  • Page 34 Figure 3-6. PERC 5/E Adapter Dirty Cache LED Location battery memory module dirty cache LED PERC 5/E Adapter CAUTION: Running a system without the system cover installed may cause damage due to improper cooling. 3 Remove the TBBU assembly from the adapter by pressing down on the tabs at each edge of the DIMM connector and lifting the TBBU off the adapter.

  • Page 35: Installing The Perc 5/I Adapter

    The PERC 5/i Adapter will have a battery backup unit (BBU) when installed on a PowerEdge server and will not have one when installed on a Dell Precision™ workstation or a PowerEdge SC server. 1 Unpack the PERC 5/i Adapter and check for damage.
  • Page 36 5 Align the PERC 5/i Adapter to the PCI-E slot you have selected. 6 Insert the adapter gently but firmly until the board is firmly seated in the PCI-E slot. See Figure 3-8. CAUTION: Do not apply pressure to the memory module while inserting the controller into the PCI-E slot. Applying pressure could break the memory module or damage the DIMM connector.

  • Page 37: Removing The Perc 5/I Adapter

    NOTE: A PERC 5/i Adapter installed on a Dell Precision workstation or PowerEdge SC server does not have a BBU. This section describes how to remove the PERC 5/i Adapter or PERC 5/i while it is installed in a system.
  • Page 38 3 Determine whether the dirty cache LED on the controller is illuminated. • If the LED is illuminated, replace the system cover, reconnect the system to power, turn on the system, and repeat step 1 and step 2. See Figure 3-10. NOTE: The location of the PERC 5/i varies from system to system.

  • Page 39: Removing The Dimm From A Perc 5/I Card

    NOTE: PERC 5 cards support DELL-qualified 256-MB DDRII 400MHz ECC-registered DIMMs with x16 DRAM components. Installing unsupported memory causes the system to hang at POST. 1 Perform a controlled shutdown on the system in which the PERC 5/i is installed and remove the PERC 5/i from the system by following the instructions detailed in the section "Removing the...

  • Page 40: Disconnecting The Bbu From A Perc 5/I Adapter Or A Perc 5/I

    NOTE: A PERC 5/i Adapter installed in a Dell Precision workstation or a PowerEdge SC server does not have a BBU. This section describes how to disconnect the BBU on a PERC 5/i Adapter or a PERC 5/i while the adapter or controller is installed in a system.

  • Page 41: Driver Installation

    Perform the following steps to create a driver diskette. 1 Browse to the download section for the system from the Dell Support website at support.dell.com. 2 Locate and download the latest PERC 5 controller driver to the system. The driver should be labeled as packaged for a diskette on the Dell Support website.

  • Page 42: Installing The Driver During A Microsoft Operating System Installation

    Windows Vista has PERC 5 driver native on the Windows Vista installation CD. For the latest supported drivers, go to the Dell Support website at support.dell.com. 1 Turn off the system. 2 Install the new RAID controller in the system.

  • Page 43: Updating An Existing Windows 2000, Windows Server 2003, Windows Xp, Or Windows Vista Driver

    9 The wizard detects and installs the appropriate device drivers for the new RAID controller. 10 Click Finish to complete the installation. 11 Reboot the server. Updating an Existing Windows 2000, Windows Server 2003, Windows XP, or Windows Vista Driver Perform the following steps to update the Microsoft Windows driver for the PERC 5 controller already installed on your system NOTE:...

  • Page 44: Installing Windows Vista For A New Raid Controller

    Installing Windows Vista for a New RAID Controller Perform the following steps to configure the driver when you add the RAID controller to a system that already has Windows Vista installed. 1 Insert the Windows Vista DVD and reboot the system. 2 Select location information, such as your country and language.

  • Page 45: Installing The Red Hat Enterprise Linux Driver

    Use the procedures in this section to install the driver for Red Hat Enterprise Linux AS (versions 3 and 4) and ES (versions 3 and 4). The driver is updated frequently. To ensure that you have the current version of the driver, download the updated Red Hat Enterprise Linux driver from the Dell Support website at support.dell.com.

  • Page 46: Installing The Driver

    Creating a Driver Update Diskette Perform the following steps to create the DUD using the DKMS tool: 1 Install the DKMS-enabled megaraid_sas driver rpm package on a system running a Red Hat Enterprise Linux operating system. 2 Type the following command in any directory: dkms mkdriverdisk -d redhat -m megaraid_sas -v <driver version>...

  • Page 47: Installing The Suse Linux Enterprise Server (Version 9 Or 10) Driver

    Use the procedures in this section to install the driver for SUSE Linux Enterprise Server (version 9 or version 10). The driver is updated frequently. To ensure you have the current version of the driver, download the updated SUSE Linux Enterprise Server (version 9 or 10) driver from the Dell Support website at support.dell.com.

  • Page 48: Installing Suse Linux Enterprise Server Using The Driver Update Diskette

    DUD Creation Procedure Perform the following steps to create the DUD using the DKMS tool. 1 Install the DKMS-enabled megaraid_sas driver rpm package on a system running a SUSE Linux operating system. 2 Type the following command in any directory: dkms mkdriverdisk -d redhat -m megaraid_sas -v <driver version>...
  • Page 49 Upgrading the Kernel If you run the up2date utility to upgrade the kernel, you must reinstall the DKMS-enabled driver packages. Perform the following steps to update the kernel: 1 Type the following in a terminal window: dkms build -m <module_name> -v <module version> -k <kernel version> dkms install -m <module_name>...
  • Page 50 Driver Installation...

  • Page 51: Raid Configuration And Management

    Dell OpenManage Storage Management is a storage management application for PowerEdge™ servers that provides enhanced features for configuring a system's locally-attached RAID and non-RAID disk storage. Dell OpenManage Storage Management enables you to perform controller and enclosure functions for all supported RAID and non-RAID controllers and enclosures from a single graphical or command-line interface without requiring the use of the controller BIOS utilities.

  • Page 52: Entering The Bios Configuration Utility

    The following sections will help you attain the basic knowledge needed to use the BIOS Configuration Utility. See the online help option by pressing <F1> to obtain additional information about the ongoing operation. NOTE: PERC 5 controller configuration utility refreshes the screen to show changes to information on the screen. The refresh occurs when you press a key or every 15 seconds if you do not press a key.
  • Page 53 Table 5-1. Menu Navigation Keys Notation Meaning and Use Example Use the right arrow key to open a submenu, move from a menu Start Programs heading to the first submenu, or move to the first item in that submenu. If you press the right arrow key at a menu heading, the submenu will expand.

  • Page 54: Raid Configuration Functions

    RAID Configuration Functions NOTE: Dell OpenManage Storage Management can perform all the same tasks as and more tasks than the BIOS Configuration Utility. After you attach physical disks, use a configuration utility to prepare a virtual disk. Groups of the SAS and Serial ATA (SATA) physical disks are organized into virtual disks that must be able to support the RAID level that you select.

  • Page 55: Bios Configuration Utility Menu Options

    The following sections describe the menu options and provide detailed instructions used to perform the configuration tasks. They apply to the BIOS Configuration Utility and Dell OpenManage Storage Management. The following is a list of the procedures used to configure physical disks into virtual disks.

  • Page 56: Virtual Disk Management (Vd Mgmt)

    Virtual Disk Management (VD Mgmt) The Virtual Disk Management screen, VD Mgmt, is the first screen that displays when you access the BIOS Configuration Utility. In the Tree View, the left frame displays the menus for the virtual disk management, which are: •...
  • Page 57 Table 5-2. Information on the Virtual Disk Management Screen (continued) Menu Item Selected in Left Information That Displays in Right Frame Frame Physical Disks • Number of virtuals disks (VD) • Number of physical disks (PD) • Space available on the physical disks •...

  • Page 58: Physical Disk Management (Pd Mgmt)

    Virtual Disk Actions Table 5-3 describes the actions you can perform on virtual disks. See "Setting Up Virtual Disks" on page 58 for procedures you can use to perform these actions. Table 5-3. Virtual Disk Menu Options Option Description Create a new virtual disk Creates a new virtual disk from one or more physical disks.

  • Page 59: Physical Disk Actions

    Physical Disk Actions Table 5-4 describes the actions you can perform on physical disks. See "Setting Up Virtual Disks" on page 58 for procedures that can be used to perform these actions. Table 5-4. Physical Disk Options Option Description Rebuild Regenerates all data to a replacement disk in a redundant virtual disk (RAID level 1, 5, 10, or 50) after a disk failure.

  • Page 60: Foreign Configuration View

    Table 5-5. Controller Management Options Option Description Enable Controller BIOS Select this option to enable the controller BIOS. If the boot device is on the RAID controller, the BIOS must be enabled. Disable the BIOS to use other boot devices. In a multiple controller environment, you can enable BIOS on multiple controllers.
  • Page 61 When you define the virtual disks, you can set the virtual disk parameters described in Table 5-6. • Stripe element size • Write policy • Read policy Table 5-6. Virtual Disk Parameters and Descriptions Parameter Description Stripe Element Stripe Element Size specifies the size of the segments written to each physical disk in a RAID 0, Size 1, 5, 10, and 50 virtual disk.

  • Page 62: Creating Virtual Disks

    Creating Virtual Disks NOTE: PERC 5 does not support creation of a virtual disk that combines SAS and SATA physical disks Perform the following steps to create virtual disks. 1 During host system bootup, press <Ctrl><R> when the BIOS banner displays. The Virtual Disk Management screen displays.

  • Page 63: Initializing Virtual Disks

    Press <Tab> to move the cursor to the Read Policy to change it if desired. Press <Enter> to display the options, Read Ahd, No Read, or Adaptive, then press the down arrow key to highlight an option and press <Enter>. Press <Tab>...

  • Page 64: Importing Or Clearing Foreign Configurations Using The Vd Mgmt Menu

    Importing or Clearing Foreign Configurations Using the VD Mgmt Menu When a foreign configuration exists, the BIOS banner displays the message Foreign configuration(s) found on adapter. In addition, a foreign configuration, when present, appears on the right side of the VD Mgmt screen. You can use the VD Mgmt menu to import the existing configuration to the RAID controller or clear the existing configuration to create a new one.
  • Page 65 Perform the following procedures on the Foreign Configuration View screen to manage foreign configurations in each specific case: 1 If all or some of the physical disks in a configuration are removed and re-inserted, the controller considers the drives to have foreign configurations. Perform the following steps: Select Foreign Configuration View to display the foreign configuration information on the Foreign Configuration View screen.

  • Page 66: Setting Led Blinking

    Setting LED Blinking The LED blinking option indicates when physical disks are being used to create a virtual disk. You can choose to start or stop the LED blinking. Perform the following steps to start or stop this option. 1 Press <Ctrl><N> to access the PD Mgmt screen. A list of physical disks appears.

  • Page 67: Creating Global Hot Spares

    Creating Global Hot Spares A global hot spare can be used to replace a failed physical disk in any redundant array as long as the capacity of the global hot spare is equal to or larger than the coerced capacity of the failed physical disk. Perform the following steps to create global hot spares.

  • Page 68: Enabling The Alarm To Alert In Case Of Physical Disk Failures

    RAID levels 1, 5, 10, and 50. (RAID 0 does not provide data redundancy.) NOTE: Dell recommends that you run data consistency checks on a redundant array at least once a month. This allows detection and automatic replacement of bad blocks. Finding a bad block during a rebuild of a failed physical disk is a serious problem, as the system does not have the redundancy to recover the data.

  • Page 69: Stopping Background Initialization

    Stopping Background Initialization Background initialization is the automated check for media errors in which parity is created and written in the process. BGI does not run on RAID 0 virtual disks. Under certain conditions, Ctrl-R will ask you if you want to stop BGI in progress. An alert message displays if BGI is in progress and you start any of the following actions: •...

  • Page 70: Deleting Disk Groups

    For example, if you delete disk group #2, disk group #3 is then automatically renumbered as disk group #2. Upgrading Firmware You can download the latest firmware from the Dell Support website and flash it to the firmware on the controller. NOTE: Go to the Dell Support website at support.dell.com.

  • Page 71: Enabling Bios Stop On Error

    3 Press the spacebar to select Enable Controller BIOS. An X displays next to Enable Controller BIOS. 4 Press <Tab> to move the cursor to the Apply button, and then press <Enter> to apply the selection. The controller BIOS is enabled. To disable the controller BIOS, use the spacebar to deselect the Enable Controller BIOS control, and then select Apply and press <Enter>.
  • Page 72 3 Use the spacebar to deselect the settings for the options in the Settings box. 4 Press <Tab> to move the cursor to the Advanced box. 5 Press the spacebar to select Advanced. An X displays next to Advanced. 6 Press <Tab> to move the cursor to Select Defaults. 7 Press the spacebar to select Select Defaults.

  • Page 73: Troubleshooting

    Troubleshooting To get help with your Dell™ PowerEdge™ Expandable RAID Controller (PERC) 5 controller, you can contact your Dell Technical Service representative or access the Dell Support website at support.dell.com. Virtual Disks Degraded A redundant virtual disk is in a degraded state when one physical disk has failed or is inaccessible. For example, a RAID 1 virtual disk consisting of two physical disks can sustain one physical disk in a failed or inaccessible state and become a degraded virtual disk.

  • Page 74: General Problems

    • Check the enclosure or backplane for damage. inaccessible state. • Check the SAS cables. • Reseat the physical disk. • Contact Dell Technical Support if the problem persists. Cannot rebuild a fault tolerant This could result from any of the following: virtual disk.

  • Page 75: Physical Disk Failures And Rebuilds

    VD will be imported in its OPTIMAL state without a rebuild occurring. You can use the BIOS Configuration Utility or Dell OpenManage Storage Management application to perform a manual rebuild of multiple physical disks. See the section "Performing a Manual Rebuild of an Individual Physical Disk" on page 67 in "RAID Configuration and Management"...

  • Page 76: Smart Error

    SMART monitors the internal performance of all motors, heads, and physical disk electronics and detects predictable physical disk failures. NOTE: For information about where to find reports of SMART errors that could indicate hardware failure, see the Dell OpenManage Storage Management documentation. Table 6-4. SMART Error Problem Suggested Solution...

  • Page 77: Perc 5 Post Error Messages

    Shut down the system and try to reseat the controller. If this where xxxx is the baseport of the message still occurs, contact Dell Technical Support. controller x Virtual Disk(s) Failed When the BIOS detects virtual disks in the failed state, it displays this warning.
  • Page 78 You can use the BIOS Configuration Utility to import or clear the foreign configuration. The foreign configuration Clear the foreign configuration using CTRL+R or Dell OpenManage™ Server Administrator Storage Management. message is always present during POST but no foreign...
  • Page 79 NOTICE: MBE errors are serious, as they result in corrupted data you continue, data corruption can and data loss. In case of MBE errors, contact Dell Technical Support. occur. Press ’X’ to continue or NOTE: A similar message appears when multiple single-bit ECC else power off the system and errors are detected on the controller during bootup.

  • Page 80: Red Hat Enterprise Linux Operating System Errors

    Red Hat Enterprise Linux Operating System Errors ® Table 6-6 describes an issue related to the Red Hat Enterprise Linux operating system. Table 6-6. Linux Operating System Error Error Message Suggested Solution <Date:Time> This error message displays when the Linux Small Computer System Interface (SCSI) mid layer asks for physical disk cache settings.

  • Page 81: Led Behavior Patterns

    Table 6-6. Linux Operating System Error (continued) Error Message Suggested Solution smartd[smartd[2338] These error messages are caused by an unsupported command coming directly from the user application. This is a known issue in which user applications try to Device: /dev/sda, Bad direct Command Descriptor Blocks to RAID volumes.
  • Page 82 Table 6-8 lists the critical and warning events, severity levels of the events, and audible codes. Table 6-8. Audible Alarm Descriptions Description Severity Audible Code Controller alarm enabled Normal Virtual disk failed Critical 3 seconds on, 1 second off Virtual disk degraded Warning 1 second on, 1 second off Global hot spare failed...

  • Page 83: Appendix: Regulatory Notices

    Plug the computer into a different outlet so that the computer and the receiver are on different branch circuits. If necessary, consult a Dell™ Technical Support representative or an experienced radio/television technician for additional suggestions. Dell computer systems are designed, tested, and classified for their intended electromagnetic environment.

  • Page 84: Fcc Notices (U.s. Only)

    Dell device to reduce the possibility of interference with radio communications services. Using shielded cables ensures that you maintain the appropriate EMC classification for the intended environment. For parallel printers, a cable is available from Dell. If you prefer, you can order a cable from Dell on the World Wide Web at www.dell.com.

  • Page 85: Industry Canada (Canada Only)

    Plug the system into a different outlet so that the system and the receiver are on different branch circuits. If necessary, consult a representative of Dell Inc. or an experienced radio/television technician for additional suggestions. The following information is provided on the device or devices covered in this document in compliance...

  • Page 86: Ce Notice (European Union)

    This Dell device is classified for use in a typical Class B domestic environment. A "Declaration of Conformity" in accordance with the preceding directives and standards has been made and is on file at Dell™ Inc. Products Europe BV, Limerick, Ireland.
  • Page 87 Appendix: Regulatory Notices...
  • Page 88 Appendix: Regulatory Notices...
  • Page 89 Appendix: Regulatory Notices...
  • Page 90 Appendix: Regulatory Notices...
  • Page 91 Appendix: Regulatory Notices...
  • Page 92 Appendix: Regulatory Notices...
  • Page 93 Appendix: Regulatory Notices...

  • Page 94: Mic Notice (Republic Of Korea Only)

    MIC Notice (Republic of Korea Only) Appendix: Regulatory Notices...

  • Page 95: Vcci (Japan Only)

    VCCI (Japan Only) Appendix: Regulatory Notices...

  • Page 96: Cnca (China Only)

    CNCA (China Only) CNCA, Class A Appendix: Regulatory Notices...

  • Page 97: Información Nom (Únicamente Para México)

    15520 México, D.F. Corporate Contact Details (Taiwan Only) Pursuant to Article 11 of the Commodity Inspection Act, Dell provides the following corporate contact details for the certified entity in Taiwan for the computer products addressed by this document: Dell B.V. Taiwan Branch 20/F, No.
  • Page 98 Appendix: Regulatory Notices...
  • Page 99 Appendix: Regulatory Notices...
  • Page 100 Appendix: Regulatory Notices...

  • Page 101: Glossary

    Glossary Battery Backup Unit (BBU) The battery backup unit protects the integrity of the Adapter cached data on the controller by providing backup An adapter enables the computer system to access power if there is a complete AC power failure or a peripheral devices by converting the protocol of one brief power outage.
  • Page 102 software monitors the addresses of subsequent reads to see if the required data is already stored in cache memory. If it is already in cache memory (a cache hit), DDR SDRAM it is read from cache memory immediately and the Acronym for Double Data Rate Synchronous main memory read is aborted (or not started).
  • Page 103 Enclosure management helps you stay Acronym for Dynamic Kernel Module Support. informed of events in the disk subsystem, such as a Designed by Dell™, DKMS creates a framework in physical disk or power supply failure. Enclosure which kernel-dependent module source can reside so...
  • Page 104 Format The process of writing a specific value to all data Failed Physical Disk fields on a physical disk, to map out unreadable or bad A physical disk that has ceased to function, that sectors. Because most physical disks are formatted consistently functions improperly, or that is when manufactured, formatting is usually done only inaccessible.
  • Page 105 Online ECC double-bit errors are serious, as they result in An online device is a device that is accessible. corrupted data and data loss. In case of double-bit ECC errors, contact Dell Technical Support. Glossary...
  • Page 106 Each PHY can form one side of the physical link in a regarded as part of the array itself. connection with a PHY on a different Dell-qualified SATA device. The physical link contains four wires that form two differential signal pairs. One differential...
  • Page 107 High-level physical disks and virtual disks. protocols deal with the data formatting, including the The Dell OpenManage™ Storage Management message syntax, the terminal to system dialogue, configures the disks after you have installed the character sets, sequencing of messages, etc.
  • Page 108 Read-Ahead Replacement Disk A memory caching capability in some controllers that A physical disk replacing a failed member disk in a allows them to read sequentially ahead of requested virtual disk. data and store the additional data in cache memory, anticipating that the additional data will be needed Replacement Unit soon.
  • Page 109 When Acronym for Serial Tunneling Protocol, STP, enables problems are detected on a drive, you can replace or communication with a Dell-qualified SATA device repair the drive without losing any data. through an attached expander. Each PHY on the SAS controller can function as an STP initiator.
  • Page 110 Striping Disk striping writes data across all physical disks in a Write-Back virtual disk. Each stripe consists of consecutive virtual In write-back caching mode, the controller sends a disk data addresses that are mapped in fixed-size units data transfer completion signal to the host when the to each physical disk in the virtual disk using a controller cache has received all the data in a disk sequential pattern.

  • Page 111: Index

    Index consistency check, 56, 66, 100 controller, 100 electrostatic discharge. See background descriptions, 11 initialization, 17, 99 stopping, 67 controller management, 57 ESD, 10 baseport, 99 battery installing transportable battery backup, 27 dedicated hot spares fault tolerance, 21 management, 19 managing, 64 features, 21 removing from PERC 5/E...
  • Page 112 SCSIport, 107 SMART technology, 17 manual rebuild, 67 RAID, 102-103 configuration, 49 span, 107 configuration and spare, 107 management, 49 Storport, 107 configuration functions, 52 operating system support, 12 configuration information, 21 stripe element size, 59 operating systems, 12 definition, 12, 105 description, 12 level migration, 105 levels, 12, 56, 105...

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