HP NetRAID Series User Guide for HP NetRAID and HP NetRAID-1
Notice The information contained in this document is subject to change without notice. Hewlett-Packard makes no warranty of any kind with regard to this material, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Hewlett-Packard shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material.
Contents Introduction .......................................................................................................... 1 HP NetRAID and HP NetRAID-1 Adapter Features ............................................ 3 A. Hardware Features........................................................................................ 3 B. RAID Management Features......................................................................... 6 C. Monitor Feature.........................................................
BIOS Error Messages...................................................................................... 60 Other Error Messages ..................................................................................... 61 Questions and Answers................................................................................... 61 Audible Warnings............................................................................................... 63 Connector Pinouts ....................................................
Introduction The HP NetRAID and HP NetRAID-1 adapters are high performance, intelligent PCI-to-SCSI host adapters with RAID control capabilities. The HP NetRAID Series Installation and Configuration Guide describes the installation and initial configuration of the adapters. This HP NetRAID Series User Guide describes hardware, troubleshooting, configuration, and management features and contains an extensive glossary of HP NetRAID terms and technologies.
HP NetRAID and HP NetRAID-1 Adapter Features HP NetRAID and HP NetRAID-1 are high performance, intelligent PCI-to-SCSI host adapters with RAID control capabilities. Up to three SCSI channels are available on the HP NetRAID adapter; one SCSI channel is available on the HP NetRAID-1 adapter. Each channel can support a maximum of six or eight Fast/Wide SCSI or Ultra/Wide SCSI devices. This section describes each adapter feature. Features are grouped together by category, as follows: A. Hardware Features B.
Onboard Speaker The adapters have an onboard tone generator for audible warnings when system errors occur. Audible warnings can be generated through this speaker. Refer to the section Audible Warnings for further information. SCSI Bus Each channel can support a maximum of six or eight Fast/Wide SCSI or Ultra/Wide SCSI devices, depending on the HP system and enclosure used. Ultra/Wide SCSI support can be enabled by the user for individual channels.
SCSI Firmware The HP NetRAID Series firmware handles all RAID and SCSI command processing and also supports the functions described in the following table.
B. RAID Management Features Major Options The adapters provide on-the-fly RAID migration, allowing for almost limitless adaptability and expansion of any logical drive while the system remains operational. Once the installation setup is complete, you have three major options: • Change, add or expand the configuration, e.g.
Valid RAID Level Changes To make practicable RAID level changes with HP NetRAID, observe the possible valid RAID level changes listed in the following table when altering a physical drive or logical drive.
E. Online Capacity Expansion Feature under Novell NetWare This section describes how users can take advantage of the NetRAID On-line Capacity Expansion feature under the Novell NetWare operating system. The benefit for the user is that new storage capacity can be added to the NetRAID controller and can be put on-line for use without rebooting the server. Follow the steps outlined below to prepare a system for capacity expansion and then expand a volume.
feature. SFT-3 mirrors disk storage on a partition basis rather than a volume basis. Because of the virtual space created within the partition, SFT-3 cannot successfully mirror the partitions. This limitation also applies to regular mirroring (without SFT-3) of volumes. Novell is aware of this issue but has not yet committed to providing a work around to this conflict. It is likely that a future version of NetWare will address this issue.
4. Load NetWare and Create NetWare Partition. Load NetWare and load the "Install" module. Select "Disk options", then "Modify disk partitions ...". Create a NetWare partition on the logical drive (which has Virtual Sizing enabled); the partition size will be 81,917 megabytes (80 gigabytes). Save the partition. 5. Create NetWare Volume. Select "Volume options" from the "Install module". Add a segment up to the actual physical capacity available; 12 gigabytes for this example.
Without Reboot You can only add capacity as a new volume. You will need to add enough physical drives to create a new array and logical drive using NetRAID Config. Then under NetWare Install, you will need to “Scan For New Devices”, and configure the new logical drive as a new NetWare volume. With Reboot If a reboot is acceptable, then the server can be downed, and Virtual Sizing enabled in Express Tools.
expansion into your installation. This will ensure that you can easily expand capacity without backup/restore operations or reconfiguration. It does not matter if NT is already installed or not at this point assuming NT will reside on a separate drive. If NT must be installed on the disk array, see the information under “Operating System and Data on Disk Array”. For this example assume that NT is installed on a drive connected to the embedded SCSI channel A.
Reconstruction and New Volumes After using the array created above, assume you are nearing the 12 gigabyte limit and you want to add another 4 gigabyte drive to the existing array. This can be done without downing the server or rebooting the system. 6. Add Capacity by Reconstruction. Add the new physical drive to the adapter by plugging it into an empty hot swap storage slot. Bring up NetRAID Assistant under NT. Select the logical drive and the new physical drive.
Existing Installations Without Virtual Sizing Enabled If you already are using the adapter without Virtual Sizing enabled, but now wish to add capacity to an existing volume, you will be limited in your options. Here are the likely scenarios when Virtual Sizing has not been enabled. Without Rebooting Unless Virtual Sizing is used, NT does not recognize new logical drives unless rebooted. Any drive (logical or physical) will not be seen under the Disk Administrator until rebooted.
PFS is enabled/disabled through either the NetRAID Express Tools or NetRAID Config utilities. The default setting is disabled. Since there is only a performance penalty during the reconstruction operation itself, it is recommended to enable the feature unless there are some rigid time constraints on reconstruction activities. I. Autorebuild Feature The Autorebuild feature detects the replacement of a failed disk drive and automatically rebuilds onto it the data that was on the failed disk.
NOS Compatibility and Driver Installation Overview HP NetRAID and HP NetRAID-1 are SCSI RAID adapters that include utilities to manage and configure RAID subsystems; both adapters use the same utilities. This HP NetRAID Series User Guide provides instructions in using the adapters to manage Redundant Arrays of Independent Disks. For instructions in configuring physical drives or logical drives, refer to the HP NetRAID Series Installation and Configuration Guide (part number 5965-2467).
Network Operating System Compatibility There are two network operating system management utilities that are used to configure and manage the HP NetRAID and HP NetRAID-1 subsystems. • HP NetRAID Assistant, an object-oriented Graphical User Interface (GUI) utility. • HP NetRAID Config, a text-based RAID configuration utility. Refer to the following table to determine which utility to use with your network operating system. HP NetRAID Config Banyan VINES 6.0, 7.0 HP NetRAID Assistant Windows NT 3.5x, 4.
Refer to the following table for filenames of drivers and utilities specific to your NOS. Network Operating System Drivers Monitor Utilities Configuration Utilities Banyan VINES 6.x, 7.0 Driver.o megamon megaconf IBM OS/2 mraid.add monitor.cmd megaconf.exe Windows NT mraidnt.sys * nraid.exe NetWare 3.1x Mega3_1x.dsk NetWare 4.1x Mega4_xx.ham Mega4_xx.ddi Mega4xx.dsk Mega4xx.ddi Megamon.nlm Megamgr.nlm NetWare ASPI Megaspi.dsk Megaspi.
7. Type "mon" from the HP NetRAID directory to run the monitor utility. Type "megaconf.exe" from the HP NetRAID directory to run the configuration utility. Microsoft Windows NT 4.0 1. Select "Start" from the taskbar. 2. Select "Run" from the "Start" menu. 3. Type ":\setup" at the "Open:" prompt ( is the drive letter of the floppy disk drive). 4. Follow the onscreen instructions. Microsoft Windows 3.5x 1. Select "File/Run" from the Program Manager. 2.
Windows NT: HP NetRAID Assistant Overview HP NetRAID Assistant is an object-oriented GUI RAID management utility that runs under Microsoft Windows NT on a server. HP NetRAID Assistant allows you to control and monitor the status of hard disk drives, locally or over a network with several servers. For instructions on configuring Physical Devices and Logical Devices, refer to the HP NetRAID Series Installation and Configuration Guide. This section describes: A. HP NetRAID Assistant Menu Options B.
NOTE Since the HP NetRAID-1 is a single channel adapter, the HP NetRAID Assistant Main Menu Screen for HP NetRAID-1 contains only Channel 0 information. Channel 1 and Channel 2 columns do not exist. Config Menu Options The following Configuration menu options will assist you in configuring the RAID. • Wizard: The Wizard performs an Automatic or Custom Configuration to suit your needs.
• Rebuild Rate: This option allows you to set the RAID rebuild drive rate for rebuilding a failed drive. The rebuild rate determines the percentage of system resources devoted to the rebuild. A 100% rebuild rate means that 100% of the system’s resources are applied to the rebuild, leaving no resources available for other tasks until the rebuild completes. The default rebuild rate is 50%.
◊ Make Hot Spare: Click first on the drive icon of the drive you want to be the hot spare • Properties: Choose this option from the Physical Drv Menu to display physical drive properties of a selected drive. The properties include Device Identification, Device Attributes, and Device Error. Physical Drive Right Mouse Button Menus When the Physical Devices box is set to either Physical View or Logical View, clicking on the right mouse button opens the Physical Drive Menu.
• Check Consistency: Ensures that parity or mirroring is correct for the selected drives. Click on the drive to be checked (LD0-LD7). RAID levels 1, 3, and 5 use mirroring or parity to store parity data blocks. Parity or mirroring is checked between these parity data blocks and the selected drives when you select this option. Check consistency should be run if the system shuts down irregularly, e.g., if the system hangs or suffers a power failure.
• Initialize • Check Consistency • Change Policy • Advanced Menu ◊ ◊ ◊ Change Config (changes RAID level only) Add Drive Virtual Sizing • Properties Progress Menu Options Using the Windows option, you can access and view the following utility monitors: • • • • • Rebuild Progress Initialize Progress Check Consistency Progress Reconstruction Progress Performance Monitor Help Menu Options The Help Menu option yields the following choices. • Help: Accesses the Help Menu for assistance.
C. Managing RAID With HP NetRAID Assistant Procedures for performing some of the most common RAID management functions are described in this section. Many of the adapter’s management functions can be performed using the drag-and-drop feature of the graphical interface in HP NetRAID’s Management Menu. Rebuilding a Failed Physical Drive The data of a failed physical drive will automatically be rebuilt onto another drive that is standing by as a hot spare.
Changing RAID Levels RAID levels can be changed using a drive in the Ready state in one of two ways: • From the Logical Drv Menu of the HP NetRAID Assistant 1. Select Logical View. 2. Highlight the logical drive you want to change from the Logical Devices box on the right side of the screen. 3. Select Logical Drv, Change Status, RAID Level. The Change RAID Level dialogue box opens. 4. Select your new RAID Level from the levels available for the new logical drive configuration. 5. Select Apply.
NetWare, OS/2, SCO and Vines: HP NetRAID Config Overview HP NetRAID Config is a character-based, non-GUI utility that configures and monitors RAID systems. HP NetRAID Config runs under the following operating systems: • Novell NetWare 3.x, 4.xx, 4.xx SMP, SFTIII 4.1 • Banyan VINES 6.0 and 7.0 • IBM OS/2 Server 2.11, 2.11 SMP, and Warp SMP • MS-DOS 3.2 or later • SCO ODT 3.0, MPX 3.0, and OpenServer 5.
B. HP NetRAID Config Management Menu Options The Management Menu options are explained below. NOTE These instructions in using HP NetRAID Config refer specifically to the Novell NetWare network operating system. Specific features may not be available in all network operating systems, and the exact location of specific menu options may vary. Configure Choose the Configure option to select a method for configuring arrays and logical drives. Refer to Configuration Methods below for instructions.
Logical Drive Choose this option to perform the listed actions. You must first select the logical drive on which you want to perform these options. • Initialize: Initializes the selected logical drive. This should be done for every logical drive you configure. • Check Consistency: Verifies the correctness of the redundancy data in the selected logical drive. This option is only available if RAID level 1, 3, 5, 10, 30, or 50 is used. Check consistency should be run if the system shuts down irregularly, e.
• Terminate Wide Channel: Enables Wide termination for the selected channel. This is required if the HP NetRAID or HP NetRAID-1 adapter is at one end of the SCSI bus for the selected channel. The default setting is Wide Termination. • Disable Termination: Disables termination on the adapter for the selected channel. This option should be used if the selected SCSI channel is terminated with Wide devices at both ends. • View Parameters: Displays the termination and active status of the selected channel.
Check Consistency Choose the Check Consistency option to verify the redundancy data in logical drives using RAID levels 1, 3, 5, 10, 30, or 50. When you choose Check Consistency, the parameters of the existing logical drives on the current adapter appear. The logical drives are listed by number. Press the arrow keys to highlight the desired logical drives. Press the spacebar to select or deselect a drive for consistency checking. Press F2 to select or deselect all the logical drives.
• View/Add/Delete Configuration: View/Add/Delete Configuration allows you to control the same logical drive parameters as New Configuration, but without disturbing the existing configuration information. It also allows you to delete a configuration. • Clear Configuration: Deletes the existing configuration. Using Auto Configuration In Auto Configuration, HP NetRAID and HP NetRAID-1 use the following configuration guidelines in the following sequence: 1.
F2 F3 F4 Display drive information for the highlighted drive. Display the logical drives that have been configured. Designate the highlighted drive as a hot spare. 3. Press the arrow keys to highlight specific physical drives. Press the spacebar to associate the highlighted physical drive with the current array. The indicator for the selected drive changes from READY to ONLIN A [array number]-[drive number]. For example, ONLIN A2-3 means disk drive 3 in array 2.
Using New Configuration The New Configuration option allows you to associate logical drives with partial and/or multiple physical arrays (the latter is called spanning of arrays). Erases Configuration Choose the New Configuration option to erase the existing configuration information about the selected adapter. To use the spanning feature and keep the existing configuration, use View/Add Configuration. 1. Choose Configure from the HP NetRAID Config Management Menu. 2.
The default setting is NoSpan. 6. Set the RAID level for the logical drive. Highlight RAID and press Enter. The available RAID levels for the current logical drives are listed. Select a RAID level and press Enter to confirm. 7. Set the spanning mode for the current logical drive. (Refer to the Span submenu options above.) Highlight Span and press Enter. 8. Set the logical drive size. Move the cursor to Size and press Enter.
3. Press the arrow keys to highlight the physical drives. Press the spacebar to select physical drives to be associated with the current array. The indicator for the selected drive changes from READY to ONLIN A [array number]-[drive number]. For example, ONLIN A2-3 means disk drive 3 in array 2. Add physical drives to the current array as desired. Try to use drives of the same capacity in a specific array.
10. When you are finished defining the current logical drive, highlight Accept and press Enter. If there is space remaining in the arrays, the next logical drive ready to be configured appears. Repeat steps 6 to 9 to configure another logical drive. If the array space has been used up, a list of the existing logical drives appears. Press any key to continue. Respond to the Save prompt. 11. Initialize the logical drives you have just configured. See Initializing Logical Drives below. D.
Individual Initialization To initialize an individual logical drive, perform the following steps: 1. Choose the Objects option from the HP NetRAID Config Management Menu. Choose the logical drive option from the Objects menu. 2. Select the logical drive to be initialized. 3. Choose Initialize from the Action menu. The progress of the initialization appears as a bar graph on the screen. 4. When initialization completes, press any key to return to the previous menu. F.
Batch Formatting 1. Choose Format from the HP NetRAID Config Management Menu. A device selection window is displayed showing the devices connected to the current adapter. 2. Press the arrow keys to highlight all drives to be formatted. Press the spacebar to select the highlighted physical drive for formatting. The selected drive flashes. 3. When you have selected the physical drives, press F10 and choose Yes to the confirmation prompt to begin formatting.
Manual Rebuild with Batch Mode 1. Choose Rebuild from the HP NetRAID Config Management Menu. A device selection window is displayed showing the devices connected to the current adapter. The failed drives have FAIL indicators. 2. Press the arrow keys to highlight all drives to be rebuilt. Press the spacebar to select the highlighted physical drive for rebuild. 3. After selecting the physical drives, press F10 and type Yes at the confirmation prompt. The indicators for the selected drives changes to REBLD.
HP NetRAID Express Tools Overview HP NetRAID Express Tools is a text-based utility contained in the adapter BIOS that configures and maintains RAID arrays, formats disk drives, and manages the RAID subsystem. HP NetRAID Express Tools contains management and diagnostic utilities that are not available with HP NetRAID Assistant or HP NetRAID Config. HP NetRAID Express Tools resides in the HP NetRAID and HP NetRAID-1 adapter BIOS, and is therefore independent of any operating system.
30, or 50. Check consistency should only be run if the system shuts down irregularly, e.g., if the system hangs or suffers a power failure. Check consistency will always remedy inconsistencies. Check consistency will only fail because firmware could not complete parity and data writes due to a power-failure or a system hang, or because the logical drive degraded or failed due to the physical drives going offline. • Disable/Enable BIOS: Disables the BIOS, e.g.
• Cache Flush Timings: Sets the cache flush interval to once every 2, 4, 6, 8, or 10 seconds. The default setting is four seconds. • View/Update Rebuild Rate: View or change the rebuild rate for the adapter. • Alarm Control: Enables, Disables, or Silences the onboard alarm tone generator. The default setting is Enabled.
• • • • Make Online: Changes the state of the selected disk drive to Online Fail Drive: Changes the state of the selected disk drive to Fail Make Hot spare: Designates the selected disk drive as a hot spare Properties: Displays the selected physical drive properties of Device Type, Capacity, Vendor ID, Product ID, Revision, SCSI Standard, and Device Errors. • Synchronous Negotiation: Disables synchronous negotiation for the selected physical device. The default is Enabled.
drive you want to rebuild by highlighting it. Press the spacebar to select the drive, F10 to start the Rebuild, F2 to view drive information, and F3 to view logical drives. Check Consistency Choose this option to verify the redundancy data in logical drives using RAID levels 1, 3, 5, 10, 30, or 50. When you choose Check Consistency, the parameters of the existing logical drives on the current adapter and a selection menu listing the logical drives by number appear.
New Configuration In New Configuration, you can modify the following logical drive parameters: • • • • • • • RAID level Stripe size Cache write policy Read policy I/O policy logical drive size Spanning of arrays If you select New Configuration, the existing configuration information on the selected adapter is destroyed when the new configuration is saved.
A message box opens to warn you if you select a drive that has already been selected in a different array. 3. Press the arrow keys to highlight specific physical drives. Press the spacebar to associate the highlighted physical drive with the current array. The indicator for the selected drive changes from READY to flashing ONLIN A[array number]-[drive number]. For example, ONLIN A2-3 means disk drive 3 in array 2. Add physical drives to the current array as desired.
After you respond to the Save prompt, you will return to the Configure menu. 9. Initialize the logical drives you have just configured; refer to Initializing logical drives later in this section. Creating Arrays Using New Configuration The New Configuration option allows you to associate logical drives with partial and/or multiple physical arrays (the latter is called spanning of arrays). NOTE Choosing the New Configuration option erases the existing configuration information on the selected adapter.
7. Set the spanning mode for the current logical drive. Highlight Span and press Enter. The options are: • CanSpan: Array spanning is enabled for the current logical drive. The logical drive can occupy space in more than one array • NoSpan: Array spanning is disabled for the current logical drive. The logical drive can occupy space in only one array To be able to span two arrays, they must have the same stripe width (they must contain the same number of physical drives) and must be consecutively numbered.
F2 F3 F4 F10 NOTE Displays the manufacturer data and the adapter error count for the highlighted drive. Displays the logical drives that have been configured. Designates the highlighted drive as a hot spare. Displays the logical drive configuration screen. Before you can press F10 to start the configuration, you must press Enter to end the configuration of the array. 3. Press the arrow keys to highlight specific physical drives.
• Stripe Size: This parameter specifies the size of the segment written to each disk in a RAID logical drive. • Write Policy: This parameter specifies the cache write policy. You can set the write policy to Write-Back or Write-Through. • Read-Ahead: This parameter enables the SCSI Read-Ahead feature for the logical drive. You can set this parameter to Normal, Read-Ahead, or Adaptive. • Cache Policy: This parameter sets read cache operation during data transfers involving the current logical drive.
2. Select the logical drive to be initialized. 3. Choose the Initialize option from the action menu. The progress of the initialization appears as a bar graph on the screen. 4. When initialization completes, press any key to return to the previous menu. Using Logical Drives in the Operating System For information on an operating system other than DOS, see the software manual accompanying the drivers for that operating system. To use the logical drive(s) in DOS, follow the procedure outlined below. 1.
• Individual Formatting: Choose the Format option from Objects on the physical drive action menu for an disk physical drive. NOTE A 5-drive RAID 5 array typically takes 620 seconds to initialize 10 GB of logical capacity, equivalent to 16.5 MB/s (physical capacity to initialize). Batch Formatting 1. Choose Format from the BIOS Setup management menu. A device selection window displays the devices connected to the current adapter. 2. Press the arrow keys to highlight all drives.
3. Choose the Rebuild option from the action menu and respond to the confirmation prompt. Rebuilding can take some time, depending on the drive capacity. 4. When rebuild completes, press any key to return to the previous menu. Manual Rebuild – Batch Mode 1. Choose Rebuild from the HP NetRAID Config Management Menu. A device selection window is displayed showing the devices connected to the current adapter. The failed drives have FAIL indicators. 2. Press the arrow keys to highlight all drives to be rebuilt.
Troubleshooting Problem Solving Issue Answer Some operating systems do not load in a NetServer with a HP NetRAID adapter. Check the system BIOS configuration for boot sequence. Make sure some Interrupts are assigned for PCI. One of the hard drive in the array fails often. Check the drive error counts using HP NetRAID Assistant. Be sure the system is booting to the correct drive. Format the drive. Rebuild the drive.
Monitor Alert List NOTE For Windows NT, the monitor capability is integrated into the HP NetRAID Assistant utility.
SCO UNIX Monitor Messages Condition Messages Monitor starts HP NetRAID Monitor activated Monitor deactivated HP NetRAID Monitor deactivated No adapter found No HP NetRAID Adapter found Adapter inquiry failed HP NetRAID inquiry failed for adapter x Physical drive state change Adapter: # PDrv Channel: SCSI ID # state change from (previous state) to (new state).
BIOS Error Messages Physical Drive Roaming Message Condition Solution Error: Following SCSI disk not found and no empty slot available for mapping it. No slot to map the disk; controller cannot complete roaming due to missing disk. Reconfigure the array because the adapter cannot resolve the physical drives into the current configuration. Following SCSI IDs have the same data Channelx:a,b,c Two or more drives (a, b, c, etc.
Other Error Messages Message Condition Following SCSI disk not found and NO empty slot available for mapping it The physical drive roaming feature failed to find the physical drive with the listed SCSI ID, and no slot is available in which to map the physical drive. The battery backing the cache memory is approaching its predicted end of life. Reconfigure the array. Warning: Battery voltage low The voltage of the battery backing the cache is low. Fast charge the battery.
Audible Warnings HP NetRAID has an onboard tone generator that indicates events and errors. Tone Pattern Three seconds on and one second off Meaning A logical drive is offline. Examples One or more drives in a RAID 0 configuration failed. Two or more drives in a RAID 1, 3, or 5 configuration failed. One second on and one second off A logical drive is running in degraded mode. One drive in a RAID 3 or 5 configuration failed.
Connector Pinouts High-Density 68-Pin SCSI Connector and P-Cable SingleEnded Cable Pinout High-Density Connector The following facts apply to the information in the High-Density SCSI connector table below: • A hyphen before a signal name indicates that signal is active low. • The connector pin refers to the conductor position when using 0.025 inch centerline flat ribbon cable with a high-density connector (AMPLIMITE .050 Series connectors).
Signal Connector Pin Cable Pin Cable Pin Connector Pin Signal TERMPWR 18 35 36 52 TERMPWR RESERVED 19 37 38 53 Reserved GROUND 20 39 40 54 GROUND GROUND 21 41 42 55 -ATN GROUND 22 43 44 56 GROUND GROUND 23 45 46 57 -BSY GROUND 24 47 48 58 -ACK GROUND 25 49 50 59 -RST GROUND 26 51 52 60 -MSG GROUND 27 53 54 61 -SEL GROUND 28 55 56 62 -C/D GROUND 29 57 58 63 -REQ GROUND 30 59 60 64 -I/O GROUND 31 61 62 65 -dB(8) GROUND
Battery Backup Module The Battery Backup Module preserves data handled by the HP NetRAID adapter by providing protection from power supply interruptions to the HP NetRAID cache memory. The Battery Backup Module can preserve 4 MB of data in DRAM for up to 72 hours. The HP NetRAID Battery Backup Module monitors the voltage level of the DRAM modules installed on the HP NetRAID card and supporting circuitry.
WARNING Do not dispose of the HP NetRAID Battery Backup Module by burning it. Do not mutilate the battery pack. Do not damage it in any way. Toxic chemicals may be released if it is damaged. Do not short-circuit the battery pack. Installing the Battery Backup Module on the Adapter Card Battery Specifications Charge Time for Battery Packs The following time-to-charge values are calculated assuming 80% efficiency in the charging process.
CAUTION Do not place the HP NetRAID battery backup module or the HP NetRAID adapter card on a conductive surface while the battery is being attached. Connecting Battery Packs The HP NetRAID battery backup module usually is shipped with an onboard four-cell Nickel-Metal Hydride battery pack already installed. If this is the case, you must only insert the battery connector into J2, as shown in the following figure.
Changing DRAM Modules NOTE The battery backup module must be disconnected before you add or remove DRAM’s to or from the HP NetRAID adapter card. Refer to the section Battery Backup for instructions on disconnecting the battery backup module. To change DRAM Modules, perform the following steps: 1. Bring down the operating system properly. Make sure that cache memory has been flushed. You must perform a system reset if operating under DOS.
HP NetRAID Specifications Parameter Specification Product Number D4943A (NetRAID); D4992A (NetRAID-1) Card Size 12.3" x 4.2" (full length PCI) Processor Intel i960CA™ 32-bit RISC processor @ 33 MHz Bus Type PCI 2.1 PCI Adapter Custom ASIC Bus Data Transfer Rate Up to 132 MB BIOS HP NetRAID BIOS Cache Configuration 4 MB using 60/70 ns × 36 (72-pin) SIMMs Firmware 256 KB × 8 flash ROM Nonvolatile RAM 8 KB × 8 for storing RAID configuration Operating Voltage 5.00 V ± 0.
Glossary Array: An array of disk modules combines the storage space on the disk modules into a single segment of contiguous storage space. The HP NetRAID adapter can group disk modules on one or more of its SCSI channels into an array. A hot spare disk module does not participate in an array. Array Management Software: Software that provides common control and management for a disk array.
Disk Mirroring: Writing duplicate data to more than one (usually two) hard disks, in order to protect against loss of data in the event of device failure. It is a common feature of RAID systems. Disk Spanning: Disk spanning allows multiple disk drives to function like one big drive. Spanning not only overcomes disk space shortage; it also simplifies storage management by combining existing resources or adding relatively inexpensive resources.
Initialization: The process of writing zeros to the data fields of a logical drive and generating corresponding parity to put the logical drive in a Ready state. Initializing erases previous data, generating parity so that the logical drive will pass a Consistency Check. Arrays will work without initializing, but they may fail a Consistency Check because parity fields may not have been generated.
distributed among all the disks in the system. If a single disk fails, it can be rebuilt from the parity of the respective data on the remaining disks. Partition: An array virtual disk made up of logical disks rather than physical ones. Also called logical volume. Physical Disk: A hard disk, one or more rigid magnetic discs rotating about a central axle with associated read/write heads and electronics, used to store data.
Replacement Disk: A disk available for use as or used to replace a failed member disk in a RAID array. Replacement Unit: A component or collection of components in a disk subsystem that are always replaced as a unit when any part of the collection fails. Typical replacement units in a disk subsystem includes disks, adapter logic boards, power supplies, and cables.
Wide SCSI: A variant on the SCSI-2 interface. It uses a 16-bit bus, double the width of the original SCSI-1, and therefore cannot be connected to a SCSI-1 bus. It supports transfer rates up to 20 MB/s, like Fast SCSI. Write-Through/Write-Back: When the processor writes to main memory, the data is first written to the cache on the assumption that the processor will probably read it again soon. In a "write-through" cache, data is written to main memory at the same time as it is cached.
