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HP Dc5750 RAID on HP Compaq dc5750 Business PCs - Page 2

Introduction, Basics of RAID Technology

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Introduction A RAID (Redundant Array of Independent Disks) is a data storage scheme that uses two or more drives accessed in combination to improve fault tolerance. Initially used with servers, desktop PCs are increasingly using RAID controller and extra ATA or SCSI disks. Newer system boards often have RAID controllers. RAID technology takes advantage of Serial Advanced Technology Attachment (SATA) and the integration of RAID into ATI's Radeon Xpress 1150 chipset with SB600 technology. The HP Compaq dc5750 Business PC products incorporate RAID drive support through factory configurations. This white paper provides a basic overview of RAID technology, supported factory configurations of HP Compaq dc5750 Business PCs, and other supported RAID configurations. Mirroring and Parity Fault tolerance is achieved by mirroring or parity. Mirroring is 100% duplication of the data on two drives (RAID 1). Parity is used to calculate the data in two drives and store the results on a third drive (RAID 5). After a failed drive is replaced, the RAID controller automatically rebuilds the lost data from the other two drives. RAID systems may have a spare drive (hot spare) ready and waiting to be the replacement for a drive that fails. Disk Striping RAID improves performance by disk striping, which interleaves bytes or groups of bytes across multiple drives, so more than one disk is reading and writing simultaneously. Basics of RAID Technology Definitions Table 1 Basic RAID Definitions ATA BIOS Chipset HDD IDE INF Migration Advanced Technology Attachment. Basic Input/Output System, also known as system ROM. Term used to define a collection of integrated components required to make a PC function. Hard disk drive. Integrated Drive Electronics. Information file (.inf) used by Microsoft operating systems that support the Plug & Play feature. When installing a driver, this file provides the operating system needed information about driver filenames, driver components, and supported hardware. Term used to describe the movement of data from one configuration or usage model to another. 2

Section	Page
Redundant Array of Independent Disks (RAID) on HP Compaq dc5750 Business PCs	1
Using ATI Array Management Software (WebPAM)	1
Introduction	2
Mirroring and Parity	2
Disk Striping	2
Basics of RAID Technology	2
Definitions	2
Table 1 Basic RAID Definitions	2
Table 2 RAID Drives	3
Basic RAID Types	4
RAID 0 with two hard drives (Striped)	4
Table 3 RAID 0 with two hard drives (Striped)	4
Figure 1 Performance - RAID 0 with two hard drives	5
Figure 2 RAID 0 - Three hard drives	5
RAID 1 with two hard drives (Mirror)	6
Table 4 RAID 1 with two hard drives (Mirror)	6
Figure 3 Reliability: RAID 1 - Mirroring	7
Configurations	7
Recommended configurations	7
HP Backup and Recovery interactions	8
1. Click Start > Search.	8
2. Click All files and folders.	8
3. Type supp*.ini in the name field.	8
4. Enter the drive letter of the HP Recovery partition and \\isos. Example: d:\\isos.	8
5. Click Search. Search results may locate more than one .ini file. Double click to open the .ini files until you locate the file containing HP Backup and Recovery.	8
Table 5 HP Backup and Recovery	9
Other supported configurations	9
Unsupported configurations	9
Configuring RAID on non-factory preinstalled configurations	10
Required BIOS Version	10
1. To download the latest BIOS softpaq go to the dc5750 software and drivers website at http:// h18007.www1.hp.com/support/files/hpcpqdt/us/locate/64_6313.html#0.	10
1. Turn on or restart the computer by clicking Start > Shut Down > Restart the Computer.	10
2. Press F10 as soon as the monitor light turns green. If you do not press F10 at the appropriate time, you must restart the computer, and then press F10 again to access the utility.	10
3. Select your language from the list, and then press Enter.	10
4. Select File > System Information and press Enter.	10
Enabling RAID through F10 System BIOS	10
1. Turn on or restart the computer by clicking Start > Shut Down > Restart the Computer.	10
2. Press F10 as soon as the monitor light turns green.	10
3. Select your language from the list, and then press Enter.	10
4. Use the arrow keys to select Storage.	10
5. Use the down arrow key to select Storage Options, and then press Enter.	11
6. On the Storage Options menu, use the down arrow key to select SATA Emulation.	11
7. Press the right arrow key until RAID displays, and then press F10 to accept.	11
8. To apply and save changes, select File > Save Changes and Exit.	11
Configuring RAID Option ROM	11
1. Turn on or restart the computer by clicking Start > Shut Down > Restart the Computer.	11
2. Press Ctrl + F as soon as the monitor light turns green to enter the RAID configuration utility. If you do not press Ctrl + F at the appropriate time, you must restart the computer, and then press Ctrl + F again to access the utility.	11
Configuring RAID Volume using the Option ROM	12
1. From the Main Menu press 3 to access the Delete LD screen. Use the arrow keys to select the drives. Press Del or Alt + D to d...	13
2. Press 1 to access the View Drive Assignments screen. The screen displays a detailed description of available physical drives, including channel, size and status. Press Esc to exit and return to the main menu.	13
3. Press 2 to access the Define LD screen. This screen allows you to configure RAID settings and assignments.	14
4. Use the arrow keys to scroll to the desired LD number and press Enter. The following screen appears. RAID 1 configurations should accept HP default settings. For all other configurations:	14
5. Press Esc to exit. At system prompt, press Y to reboot or any other key to go back.	14
Select boot order	15
1. Turn on or restart the computer by clicking Start > Shut Down > Restart the Computer.	15
2. Press F10 as soon as the monitor light turns green.	15
3. Select your language from the list, and then press Enter.	15
4. Use the arrow keys to select Storage.	15
5. Use the down arrow key to select Boot Order, and then press Enter.	15
6. Use the down arrow key to select ATAPI CD-ROM Drive, and then press Enter. Press the arrow key up to the desired position in the boot order. Press Enter again and F10 to accept the change.	15
7. To apply and save changes, select File > Save Changes and Exit.	15
Notes for operating system installation	15
1. Insert the Windows XP CD-ROM and reboot the computer.	15
2. Press F6 at the prompt to begin installation.	15
3. Press S at the prompt to Specify Additional Device.	16
4. Insert the RAID driver floppy and press ENTER to select the RAID driver.	16
5. Press ENTER to complete the Microsoft Windows installation.	16
ATI Array Management Software (WebPAM)	17
Java Runtime Environment	17
Console Software Installation	17
1. Double-click on the WebPAM icon on your desktop.	17
2. When the opening screen appears, type admin in the Login ID field. Type admin in the Password field. Note: The WebPAM login and password are case sensitive.	17
3. Click the Sign in button.	17
Recommended Initial Settings	18
Administrator’s Settings	18
1. In Tree view, under Administrative Tools, click on the User Management icon.	18
2. In the Management Window, click on the admin link.	18
3. Click on the Settings tab.	18
4. If you want to change the default password, type the new password into the New Password field.	18
5. Type the same password into the Retype Password field.	18
6. If you plan to set up Event Notification, type the Administrator’s email address in the Email field.	18
7. Click on the Submit button. If the action was successful, the Management Window will display the message “Update Success.”	18
8. If you plan to set up Event Notification, click on the Events tab.	19
9. Check the boxes of the notification events that you want to have reported to you via email and popup messages. To select events by their severity, check one of the four Select Events boxes at the top of the window.	19
10. Click the Submit button. For more information about Event Notification, see the WebPAM User Manual.	19
Utility Configuration	19
1. In Tree View, under Administrative Tools, click on the Utility Configuration icon.	19
2. Enter the Sender’s address in the Email Sender field. Be sure the sender has an account in your email system.	19
3. Enter your email server in the Email Server field.	19
4. Keep or change the Email Subject line.	19
5. Click the Submit button when you are done.	20
Degradation	20

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Introduction

A RAID (Redundant Array of Independent Disks) is a data storage scheme that uses two or more drives

accessed in combination to improve fault tolerance. Initially used with servers, desktop PCs are increas-

ingly using RAID controller and extra ATA or SCSI disks. Newer system boards often have RAID control-

lers.

RAID technology takes advantage of Serial Advanced Technology Attachment (SATA) and the integration

of RAID into ATI’s Radeon Xpress 1150 chipset with SB600 technology. The HP Compaq dc5750 Business

PC products incorporate RAID drive support through factory configurations. This white paper provides a

basic overview of RAID technology, supported factory configurations of HP Compaq dc5750 Business

PCs, and other supported RAID configurations.

Mirroring and Parity

Fault tolerance is achieved by mirroring or parity. Mirroring is 100% duplication of the data on two drives

(RAID 1). Parity is used to calculate the data in two drives and store the results on a third drive (RAID 5).

After a failed drive is replaced, the RAID controller automatically rebuilds the lost data from the other two

drives. RAID systems may have a spare drive (hot spare) ready and waiting to be the replacement for a

drive that fails.

Disk Striping

RAID improves performance by disk striping, which interleaves bytes or groups of bytes across multiple

drives, so more than one disk is reading and writing simultaneously.

Basics of RAID Technology

Definitions

Table 1

Basic

RAID Definitions

ATA

Advanced Technology Attachment.

BIOS

Basic Input/Output System, also known as system ROM.

Chipset

Term used to define a collection of integrated components required to make a PC function.

HDD

Hard disk drive.

IDE

Integrated Drive Electronics.

INF

Information file (.inf) used by Microsoft operating systems that support the Plug & Play feature.

When installing a driver, this file provides the operating system needed information about driver

filenames, driver components, and supported hardware.

Migration

Term used to describe the movement of data from one configuration or usage model to another.