Dell™ PowerEdge™ Expandable RAID Controller 4/Di/Si and 4e/Di/Si User's Guide Safety Instructions Overview Introduction to RAID Features RAID Configuration and Management Driver Installation Troubleshooting Appendix A: Regulatory Notice Glossary Information in this document is subject to change without notice. © 2003-2005 Dell Inc. All rights reserved. Reproduction in any manner whatsoever without the written permission of Dell Inc. is strictly forbidden.
Back to Contents Page Appendix A: Regulatory Notice Dell™ PowerEdge™ Expandable RAID Controller 4/Di/Si and 4e/Di/Si User's Guide FCC Notices (U.S. Only) A Notice About Shielded Cables Class B Canadian Compliance (Industry Canada) MIC Notice (Republic of Korea Only) VCCI Class B Statement FCC Notices (U.S. Only) Most Dell systems are classified by the Federal Communications Commission (FCC) as the rating of some configurations to Class A.
l Product name: Dell PowerEdge Expandable RAID Controller 4 Controller l Company name: Dell Inc. Regulatory Department One Dell Way Round Rock, Texas 78682 USA 512-338-4400 Canadian Compliance (Industry Canada) Canadian Regulatory Information (Canada Only) This digital apparatus does not exceed the Class B limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications.
VCCI Class B Statement Back to Contents Page
Back to Contents Page Overview Dell™ PowerEdge™ Expandable RAID Controller 4/Di/Si and 4e/Di/Si User's Guide Features RAID and SCSI Modes Changing the Mode on the Embedded RAID Controller from RAID/RAID to RAID/SCSI Mode or from RAID/SCSI to RAID/RAID Mode The DellT M PowerEdgeT M Expandable RAID Controller (PERC) 4/Di/Si and 4e/Di/Si are embedded subsystems on the motherboard that offer RAID control capabilities.
RedHat® Linux® l NOTE: See Driver Installation for the latest operating system versions and driver installation procedures for the operating systems. RAID and SCSI Modes RAID mode allows the channel on the controller to support RAID capabilities, while SCSI mode allows the channel to operate as a SCSI channel. Devices attached to the SCSI channel are not controlled by the RAID firmware and function as if attached to a regular SCSI controller.
Changing the Mode on the Embedded RAID Controller from RAID/RAID to RAID/SCSI Mode or from RAID/SCSI to RAID/RAID Mode The embedded RAID controller on the system supports two modes of operations: RAID/RAID and RAID/SCSI. The RAID/RAID mode allows the system to use both SCSI channels for RAID only operation. The RAID/SCSI mode allows the system to use RAID for the internal SCSI disk drives and reserves one SCSI channel to allow the connection of internal tape or external SCSI devices.
7. Press again to verify the change. Recreating your RAID configuration: 1. When the RAID controller initialization displays, press to enter the RAID controller configuration utility. 2. Create the RAID volumes required for your desired configuration. NOTE: Refer to RAID Configuration and Management for more information on how to create RAID volumes using the RAID controller configuration utility.
Back to Contents Page Introduction to RAID Dell™ PowerEdge™ Expandable RAID Controller 4/Di/Si and 4e/Di/Si User's Guide Components and Features RAID Levels RAID Configuration Strategies RAID Availability Configuration Planning RAID is an array of multiple independent hard disk drives that provides high performance and fault tolerance. The RAID array appears to the host computer as a single storage unit or as multiple logical units.
Physical Array A physical array is a group of physical disk drives. The physical disk drives are managed in partitions known as logical drives. Logical Drive A logical drive is a partition in a physical array of disks that is made up of contiguous data segments on the physical disks. A logical drive can consist of an entire physical array, more than one entire physical array, a part of an array, parts of more than one array, or a combination of any two of these conditions.
redundancy). For example, in a system with parity, checking consistency means computing the data on one drive and comparing the results to the contents of the parity drive. NOTE: It is recommended that you perform a consistency check at least once a month. Background Initialization Background initialization is a consistency check that is forced when you create a logical drive.
Disk striping allows you to write data across multiple physical disks instead of just one physical disk. Disk striping involves partitioning each drive storage space into stripes that can vary in size from 8 KB to 128 KB. These stripes are interleaved in a repeated sequential manner. The combined storage space is composed of stripes from each drive. PERC 4/Di/Si and 4e/Di/Si support stripe sizes of 2 KB, 4 KB, 8 KB, 16 KB, 32 KB, 64 KB, and 128 KB.
Parity generates a set of redundancy data from two or more parent data sets. The redundancy data can be used to reconstruct one of the parent data sets. Parity data does not fully duplicate the parent data sets. In RAID, this method is applied to entire drives or stripes across all disk drives in an array. The types of parity are shown in Table 2-1. Table 2-1. Types of Parity Parity Type Description Dedicated The parity of the data on two or more disk drives is stored on an additional disk.
See RAID Configuration and Management for detailed procedures for configuring arrays and logical drives, and spanning the drives. Table 2-2. Spanning for RAID 10 and RAID 50 Level Description 10 Configure RAID 10 by spanning two contiguous RAID 1 logical drives. The RAID 1 logical drives must have the same stripe size. 50 Configure RAID 50 by spanning two contiguous RAID 5 logical drives. The RAID 5 logical drives must have the same stripe size.
When a physical drive in a RAID array fails, you can rebuild the drive by recreating the data that was stored on the drive before it failed. The RAID controller uses hot spares to rebuild failed drives automatically and transparently, at user-defined rebuild rates. If a hot spare is available, the rebuild can start automatically when a drive fails. If a hot spare is not available, the failed drive must be replaced with a new drive so the data on the failed drive can be rebuilt.
Hot Spare The physical drive is powered up and ready for use as a spare in case an online drive fails. Fail A fault has occurred in the physical drive, placing it out of service. Rebuild The physical drive is being rebuilt with data from a failed drive. Logical Drive States The logical drive states are described in Table 2-4. Table 2-4. Logical Drive States State Description Optimal The logical drive operating condition is good. All configured physical drives are online.
l The number of physical drives in the disk array l The capacity of the physical drives in the array l The need for data redundancy l The disk performance requirements RAID 0 RAID 0 provides disk striping across all drives in the RAID array. RAID 0 does not provide any data redundancy, but does offer the best performance of any RAID level. RAID 0 breaks up data into smaller blocks and then writes a block to each drive in the array.
online customer service that requires fault tolerance. Use for any application that has high read request rates but low write request rates. Strong Points Weak Points Drives Provides data redundancy, high read rates, and good performance in most environments. Provides redundancy with lowest loss of capacity. Not well suited to tasks requiring lot of writes. Suffers more impact if no cache is used (clustering). Disk drive performance will be reduced if a drive is being rebuilt.
Table 2-9 provides an overview of RAID 50. Table 2-9. RAID 50 Overview Uses Appropriate when used with data that requires high reliability, high request rates, high data transfer, and medium to large capacity. Strong Points Provides high data throughput, data redundancy and very good performance. Weak Points Requires 2 to 8 times as many parity drives as RAID 5. Drives 6 to 28 Dell supports the use of two channels with a maximum of 14 physical drives per channel.
that requires fault tolerance and minimal capacity. 5 Combines distributed parity with disk striping. Parity provides redundancy for one drive failure without duplicating the contents of entire disk drives. If a drive fails, the RAID controller uses the parity data to reconstruct all missing information. In RAID 5, this method is applied to entire drives or stripes across all disk drives in an array. Using distributed parity, RAID 5 offers fault tolerance with limited overhead.
RAID Availability Concept Data availability without downtime is essential for many types of data processing and storage systems. Businesses want to avoid the financial costs and customer frustration associated with downed servers. RAID helps you maintain data availability and avoid downtime for the servers that provide that data. RAID offers several features, such as spare drives and rebuilds, that you can use to fix any hard drive problems, while keeping the server(s) running and data available.
Array Purpose Important factors to consider when creating RAID arrays include availability, performance, and capacity. Define the major purpose of the disk array by answering questions related to these factors, such as the following, which are followed by suggested RAID levels for each situation: l Will this disk array increase the system storage capacity for general-purpose file and print servers? Use RAID 5, 10, or 50.
Back to Contents Page Features Dell™ PowerEdge™ Expandable RAID Controller 4/Di/Si and 4e/Di/Si User's Guide PassThru (Legacy) SCSI Channel RAID Configuration Information RAID Performance Features RAID Management Utilities Supported Operating Systems and Drivers Fault Tolerance Features RAID Controller Specifications This section describes the features of the RAID controller, such as the configuration features, array performance features, hardware specifications, RAID management utilities, and operating s
NOTE: Unlike initialization of logical drives, background initialization does not clear data from the drives. LED Operation The LED on the drive carrier indicates the state of each drive. For internal storage enclosures, see the storage enclosure user's guide for more information about the blink patterns. PassThru (Legacy) SCSI Channel The RAID controller provides the ability to use a passthru (legacy) SCSI channel. This is known as "RAID/SCSI mode.
Maximum number of scatter/gather elements 64 Drive data transfer rate Up to 320 MB/sec Maximum size of I/O requests 6.4 MB in 64 KB stripes Maximum outstanding I/O requests per drive Limited only to drive capabilities Stripe sizes 2 KB, 4 KB, 8 KB, 16 KB, 32 KB, 64 KB, or 128 KB 255 (Linux® supports only 126 concurrent commands. The 255 command limit is in the firmware and the driver limit is lower.
WS 2003 Standard Server Y Y Y WS 2003 Web Server Y Y Y 2003 Small Business Server (SBS) Y Y Y WS 2003 Enterprise Server Y Y Y W2K3 EM64T N Y Y RHEL v2.1 Update 3 Y Y Y RHEL v3.0 Update 2 (EM64T) N Y Y RHEL v3.0 GOLD Y Y Y RHEL v3.0 Update 3 (32bit and EM64T) N Y Y RHEL 4.0 32-bit Y Y Y RHEL 4.0 EM64T N Y Y NetWare 5.1 SP8 Y Y Y NetWare 6.
The firmware automatically detects and rebuilds failed drives. This can be done transparently with hot spares. RAID Controller Specifications Table 3-5 lists the RAID controller specifications. Table 3-5. RAID Controller Specifications Parameter PERC 4/Di/Si PERC 4e/Di/Si Processor Intel® i303 64-bit RISC processor @ 100 MHz Bus type PCI Rev. 2.2 PCI Express Rev. 1.
Table 3-6. SCSI Firmware Feature Description Disconnect/reconnect Tagged command queuing Optimizes SCSI bus utilization Multiple tags to improve random access Scatter/gather Single command can transfer data to and from different memory locations Multi-threading Up to 189 simultaneous commands with elevator sorting and concatenation of requests per SCSI channel Stripe size Variable for all logical drives: 2 KB, 4 KB, 8 KB, 16 KB, 32 KB, 64 KB, or 128 KB. The default is 64 KB.
Back to Contents Page RAID Configuration and Management Dell™ PowerEdge™ Expandable RAID Controller 4/Di/Si and 4e/Di/Si User's Guide Entering the BIOS Configuration Utility Exiting the Configuration Utility RAID Configuration Functions Configuration Utility Menu BIOS Configuration Utility Menu Options Device Management Simple Array Setup Advanced Array Setup Managing Arrays Deleting Logical Drives Patrol Read This section describes how to configure physical drives into arrays and logical drives using the
Exiting the Configuration Utility 1. Press when the Management Menu displays. 2. Select Yes at the prompt. 3. Reboot the system. RAID Configuration Functions NOTE: The OpenManage™ Array Manager and Dell OpenManage Storage Management can perform many of the same tasks as the BIOS Configuration Utility. After you have attached all physical drives, use a configuration utility to prepare a logical drive.
BIOS Configuration Utility Menu Options Table 4-1 describes the options for the BIOS Configuration Utility Management Menu. The menu and sub-menu options are explained in the following sections. Table 4-1. BIOS Configuration Utility Menu Options Option Description Configure Select this option to configure hard disk drives into arrays and logical drives. Initialize Select this option to initialize one or more logical drives.
Configuration one logical drive. New Configuration Select this method to discard the existing configuration information and to configure new arrays and logical drives. In addition to providing the basic logical drive configuration functions, New Configuration allows you to associate logical drives with multiple arrays (spanning.) View/Add Configuration Select this method to examine the existing configuration and/or to specify additional arrays and logical drives.
BIOS Echoes Messages: When set to On (the default), all controller BIOS messages display during bootup. BIOS Configuration Autoselection: Use this option if there is a mismatch between configuration data in the drives and NVRAM, so you can select a method to resolve it. The options are NVRAM, Disk, and User. The default is User. Patrol Read Options Patrol Read involves the review of your system for possible hard drive errors that could lead to drive failure, then action to correct errors.
View Rebuild Progress Indicates how much of the rebuild has been completed. Set Write Cache Select this option to enable or disable write cache on this device. See Logical Drive Parameters and Descriptions in this section for more information about write cache policy. Transfer Speed Option Selects the speed at which data is transferred. Displays a menu that contains the options Negotiation=Wide, and Set Transfer Speed. The maximum transfer speed is 320 M.
Physical Drive Selection Menu The configuration utility offers the Physical Drive Selection Menu which you can use to perform actions on the physical drives in an array, such as rebuilding a drive or making a hot spare online or offline. Some of these actions are described in detail in other sections of this chapter. Perform the following steps to view the actions you can select. 1. On the Management Menu select Objects—> Physical Drive. A physical drive selection screen appears. 2.
Simple Array Setup This section describes the steps used in Easy Configuration to set up a simple array and create logical drives. In Easy Configuration, each physical array you create is associated with exactly one logical drive, so you cannot span arrays. In addition, in Easy Configuration, you cannot change the logical drive size. You can modify the following logical drive parameters, which are described in Table 4-9.
1. Select Configure—> Easy Configuration from the Management Menu. Hot key information displays at the bottom of the screen. 2. Press the arrow keys to highlight specific physical drives. 3. Press the spacebar to associate the selected physical drive with the current array. The selected drive changes from READY to ONLIN A[array number]-[drive number]. For example, ONLIN A02-03 means array 2 with hard drive 3. 4. Add physical drives to the current array as desired.
20. Respond to the Save prompt. After you respond to the prompt, the Configure menu appears. 21. Press to return to the Management Menu. The logical drives you configured need to be initialized to prepare them for use. 22. Select Initialize on the Management Menu. The configured logical drives display. NOTE: When the Fast Initialization option in the Objects→ Adapter menu is set to Disabled, a full initialization takes place on the entire logical drive.
The selected drive changes from READY to ONLINE A[array number]-[drive number]. For example, ONLINE A02-03 means array 2 with hard drive 3. 4. Add physical drives to the current array as desired. Try to use drives of the same capacity in a specific array. If you use drives with different capacities in an array, all drives in the array are treated as if they have the capacity of the smallest drive in the array.
The logical drives you configured need to be initialized to prepare them for use. 23. Select Initialize on the Management Menu. The configured logical drives display. NOTE: A full initialization will not resume after a power loss; it will start completely over. 24. Use the arrow key to highlight a logical drive, then press the spacebar to select a logical drive or press to select all the logical drives. 25. Press to initialize the selected logical drive(s) and select Yes at the prompt.
9. Select a RAID level and press to confirm. 10. Highlight Span and press . 11. Highlight a spanning option and press . The maximum number of spans is eight. 12. Move the cursor to Size and press to set the logical drive size. By default, the logical drive size is set to all available space in the array(s) associated with the current logical drive, accounting for the Span setting. 13. Highlight Span and press . 14.
l Maximum number of hard disk drives that you can use in each RAID level l Array configuration l Logical drive properties l Clearing physical drives l Designating physical drives as hot spares l Rebuilding failed physical drives l Checking data consistency l Reconstructing logical drives l Performing an online capacity expansion l Performing drive roaming or drive migration Guidelines for SCSI Devices in a RAID Array Observe the following guidelines when connecting and configuring SCSI
Only one RAID level can be assigned to each logical drive. Table 4-12 shows the minimum and maximum number of drives required for each RAID level. Table 4-12.
Spanned Drives You can arrange arrays sequentially with an identical number of drives so that the drives in the different arrays are spanned. Spanned drives can be treated as one large drive. Data can be striped across multiple arrays as one logical drive. The maximum number of spans is eight. You can create spanned drives using your array management software, which is the BIOS Configuration Utility.
Performance Considerations The system performance improves as the number of spans increases. As the storage space in the spans is filled, the system stripes data over fewer and fewer spans and RAID performance degrades to that of a RAID 1 or RAID 5 array. Clearing Physical Drives You can clear the data from SCSI drives using the configuration utilities. To clear a drive, perform the following steps: 1. Select Management Menu—> Objects—> Physical Drives in the BIOS Configuration Utility.
Using the Objects—> Physical Drive menu. l Key When you select any configuration option, a list of all physical devices connected to the current controller appears. Perform the following steps to designate a drive as a hot spare: 1. On the Management Menu select Configure, then a configuration option. 2. Press the arrow keys to highlight a hard drive that displays as READY. 3. Press to designate the drive as a hot spare. 4. Click YES to make the hot spare. The drive displays as HOTSP.
NOTE: If a rebuild to a hotspare fails for any reason, the hotspare drive will be marked as "failed". Use the following procedures to rebuild one failed drive manually in an individual mode or multiple drives in a batch mode. Manual Rebuild – Rebuilding an Individual Drive 1. Select Objects—> Physical Drive from the Management Menu. A device selection window displays the devices connected to the current controller. 2. Designate an available drive as a hot spare before the rebuild starts.
A progress graph for each selected logical drive displays. 7. When the check is finished, press any key to clear the progress display. 8. Press to display the Management Menu. (To check an individual drive, select Objects—> Logical Drives from the Management Menu, the desired logical drive(s), then Check Consistency on the action menu.) NOTE: Stay at the Check Consistency menu until the check is complete.
Configuration data is saved in both non-volatile random access memory (NVRAM) on the RAID controller and on the hard drives attached to the controller. This maintains the integrity of the data on each drive, even if the drives have changed their target ID. NOTE: If you move a drive that is currently being rebuilt, the rebuild operation will restart, not resume. Perform the following steps to use drive roaming: 1.
9. l Close the cabinet of the host system. l Turn power on after completing the safety check. Power on the system. The controller then detects the RAID configuration from the configuration data on the drives. Deleting Logical Drives This RAID controller supports the ability to delete any unwanted logical drives and use that space for a new logical drive. You can have an array with multiple logical drives and delete a logical drive without deleting the whole array.
You can use the BIOS Configuration Utility to configure Patrol Read. Dell OpenManage Array Manager and OpenManage System Storage Management cannot configure Patrol Read. Patrol Read can be started and stopped using MegaPR from within Window and Linux.
2. State = Active/Stopped 3. Next Execution will Start at The current state is shown at the second option that allows you to display the percentage of completion by pressing key if the Patrol Read state is Active. The first and the third options are read only. Patrol Read Control When you select this option, a window opens to display the following options: 1. Start 2. Stop NOTE: Start or Stop options are available in manual mode only.
Back to Contents Page Driver Installation Dell™ PowerEdge™ Expandable RAID Controller 4/Di/Si and 4e/Di/Si User's Guide Obtaining Drivers Using the Dell OpenManage Installation and Server Management or Server Assistant CD to Install an Operating System Installing Windows 2000 or 2003 Using the Microsoft Operating System CD with Driver Diskette Installing a Windows 2000 or 2003 Driver for a New RAID Controller Updating an Existing Windows 2000 or 2003 Driver Installing the Linux RedHat Driver Installing the
The Dell Installation and Server Management or Dell Server Assistant CD provides significant enhancements that streamline the installation of the Operating System on the PowerEdge Server. The Dell Installation and Server Management or Dell Server Assistant CD ships with every Dell PowerEdge Server. This proven set of tools and documentation greatly enhances the customer's out-of-box experience by providing an easy to follow step-by-step setup and operating system installation process.
Within a few minutes, a screen appears that asks for additional controllers in the system. 3. Press the key. The system prompts for the driver diskette to be inserted. 4. Insert the driver diskette in the floppy drive and press the key. A list of PERC controllers appears. 5. Select the right driver for the installed controller and press the key to load the driver.
2. Click on the Hardware tab. 3. Click the Device Manager and the Device Manager screen displays. 4. Click SCSI and RAID Controllers. 5. Double-click the RAID controller for which you want to update the driver. 6. Click the Driver tab and click on Update Driver. The screen for the Upgrade Device Driver Wizard displays. 7. Insert the appropriate driver diskette. 8. Click Next. 9. Follow the steps in the Wizard to search the diskette for the driver. 10. Select the INF file from the diskette.
NOTE: You can also create a driver diskette using the Dell OpenManage Systems Management CD or Server Support CD. See Creating a Driver Diskette in the Installing Windows 2000 or 2003 Using the Microsoft Operating System CD with Driver Diskette section for more information. Installing the Driver Perform the following steps to install RedHat Linux 9.0 or later and the appropriate RAID drivers. 1. Boot normally from the RedHat Linux installation CD. 2. At the command prompt, type: expert noprobe dd 3.
1. There is a directory /usr/src/megaraid2-, which contains the driver source code, dkms.conf and spec file for the driver. 2. In this directory, there is a subdirectory called redhat_driver_disk which contains the files needed to create the DUD. The files needed are: disk_info, modinfo, modules.dep, and pcitable. 3. To create the DUD image for pre-RedHat4 distribution, the kernel source package has to be installed to compile the driver.
1. At the root prompt, perform the following steps: a. For NetWare 5.1 and 6.0, type: nwconfig and press . The Installation Options screen displays. b. For NetWare 6.5, type: hdetect and press Continue on the first menu to go to the storage drivers, then follow the instructions for updating the driver. For NetWare 6.5, you can press to auto detect drivers. 2. Select Configure Disk and Storage Device Options, then press . 3.
and press . The following supported slot options display: l No Selection l PCI Slot_2.1 (HIN 202) l PCI EMBEDDED (HIN 10017) NOTE: Write down the number after "HIN". In step 3, the number is 10017. 4. Under choice, type: 0 This is for no selection. 5. At the command prompt (System Console), type Edit Startup.ncf A list of CDM drivers displays. 6. Select LOAD PEDGE3.HAM SLOT=XXXX. 7. Before you exit the list of CDM drivers, press to save the update. 8.
10. Select Continue and press . NOTE: You must load a driver for each controller. For example, if you have four adapters, the driver is listed four times. Updating an Existing Driver for NetWare 5.1 or 6.0 Perform the following steps to update an existing driver for NetWare 5.1 or 6.0: 1. Create a driver diskette. See Creating a Driver Diskette in the Installing Windows 2000 or 2003 Using the Microsoft Operating System CD with Driver Diskette section for information.
21. Under Slot Number, enter the slot number you obtained from System Console and press . 22. Press to save the pedge3 parameters. 23. Under Driver pedge3 Parameters Actions, select Save Parameters and Load Driver, and press . 24. Select No when asked to load additional drivers. pedge3 will be listed on the Selected Disk Driver screen. 25. Exit the NetWare Installation Utility. 26. From server console, type: reset server to restart the server for the changes to take effect.
server The operating system starts to boot. 10. To verify the driver version, at System Console (1) type: modules Pedge3* The driver version displays.
Back to Contents Page Troubleshooting Dell™ PowerEdge™ Expandable RAID Controller 4/Di/Si and 4e/Di/Si User's Guide Logical Drive Degraded System CMOS Boot Order General Problems Hard Disk Drive Related Issues Drive Failures and Rebuilds SMART Error BIOS Error Messages To get help with problems with your RAID controller, you can contact your Dell Service Representative or access the Dell Support web site at support.dell.com.
The BIOS Configuration Utility does not detect a replaced physical drive in a RAID 1 array and offer the option to start a rebuild. After the drive is replaced, the utility shows all drives online and all logical drives reporting optimal state. It does not allow rebuilding because no failed drives are found. This occurs if you replace the drive with a drive that contains data. If the new drive is blank, this problem does not occur.
Rebuilding a hard disk If you have configured hot spares, the RAID controller automatically tries to use them to rebuild failed disks. Manual rebuild is drive after a single drive necessary if no hot spares with enough capacity to rebuild the failed drives are available.You must insert a drive with enough failure storage into the subsystem before rebuilding the failed drive. You can use the BIOS Configuration Utility or Dell OpenManage® Array Manager to perform a manual rebuild of an individual drive.
BIOS Disabled. No Logical Drives Handled by BIOS When the BIOS is disabled, you are given the option to enable it by entering the configuration utility. You can change the setting to enabled in the configuration utility. Press to Enable BIOS Configuration of NVRAM and drives mismatch If your boot-time BIOS options are set to Auto mode for BIOS configuration autoselection, the BIOS detects a mismatch of configuration data on the NVRAM and disks and this warning displays.
When the battery temperature is high, the BIOS displays this warning. Your system is too hot. Check the air temperature and remove any obstructions to airflow. See messages below link. Warning: Battery temperature high Your RAID battery has a maximum number of charge and discharge cycles. When the BIOS displays this warning, the battery has reached the maximum number of cycles. Replace the battery.
Back to Contents Page Glossary Dell™ PowerEdge™ Expandable RAID Controller 4/Di/Si and 4e/Di/Si User's Guide A•B•C•D•F•G•H•I•L•M•N•O•P •R•S•T•W Adapter Swapping When an adapter fails, a a replacement can be inserted and connected to the existing set of drives. Dell supports adapter swapping only when all the attached disks are migrated to a new adapter that has a clear configuration. Array An array of disk drives combines the storage space on the disk drives into a single segment of storage space.
Disk Array A collection of disks from one or more disk subsystems controlled by array management software. The array management software controls the disks and presents them to the array operating environment as a virtual disk. Disk Duplexing A variation on disk mirroring in which a second disk adapter or host adapter and redundant disk drives are present. Disk Mirroring Writing duplicate data to more than one (usually two) hard disks to protect against data loss in the event of device failure.
Hot Swap Disk Drive Hot swap drives allow a system administrator to replace a failed disk drive in a system without powering down the system and suspending services. The hot swap drive is pulled from its slot in the drive cage; all power and cabling connections are integrated into the drive enclosure backplane. The replacement hot swap drive can then slide into the slot. Hot swapping only works for RAID 1, 5, and 10 configurations.
PERC 4e/Di provides reliability, high performance, and fault-tolerant disk subsystem management. It is an ideal RAID solution for the internal storage of Dell's workgroup, departmental, and enterprise systems. PERC 4e/Di offers a cost-effective way to implement RAID in a server and provides reliability, high performance, and fault-tolerant disk subsystem management. Physical Disk A hard drive.
The RAID controller controls hard drives via 320M SCSI buses (channels) over which the system transfers data in either LVD or 320M SCSI modes. Each adapter controls two SCSI channels. SCSI Disk Status A SCSI disk drive (physical drive) can be in one of these four states: l Online: A powered-on and operational disk. l Hot Spare: A powered-on, stand-by disk ready for use if another disk fails. l Not Responding: The disk is not present, not powered-on, or has failed.
Back to Contents Page Dell™ PowerEdge™ Expandable RAID Controller 4/Di/Si and 4e/Di/Si User's Guide Safety Instructions Safety Instructions CAUTION: Safety Instructions Use the following safety guidelines to help ensure your own personal safety and to help protect your computer and working environment from potential damage. General l l l Do not attempt to service the computer yourself unless you are a trained service technician. Always follow installation instructions closely.
NOTE: The voltage selection switch must be set to the 115-V position even though the AC power available in Japan is 100 V. l 100 V/50 Hz in eastern Japan and 100 V/60 Hz in western Japan l 230 V/50 Hz in some regions in the Caribbean and South America and most of Europe, the Middle East, and the Far East Also, ensure that your monitor and attached devices are electrically rated to operate with the AC power available in your location.
Ergonomic Computing Habits CAUTION: Improper or prolonged keyboard use may result in injury. CAUTION: Viewing the monitor screen for extended periods of time may result in eye strain. Battery Disposal Do not dispose of the battery along with household waste. Contact your local waste disposal agency for the address of the nearest battery deposit site.
