Lenovo 415711U - THINKSTATION S20 TWR W3520 2.8G User Manual

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Contents

Installing SAS hard disk drives and configuring RAIDThis section contains information about the required number of SAS hard diskdrives for the supported level of RAID and SAS RAID configuration.Installing SAS hard disk drivesYour computer must have the minimum number of SAS hard disk drives installedfor the supported level of RAID below:v RAID Level 0 – Striped disk array– Two hard disk drives minimum– Better performance without fault tolerancev RAID Level 1 – Mirrored disk array– Two hard disk drives minimum– Improved read performance and 100% redundancyv RAID Level 5 – Block-level striped disk array with distributed parity– Three hard disk drives minimum– Data striped at the byte level– Stripe error correction information– Better performance and fault toleranceTo install a new SAS hard disk drive, refer to the installation procedure in“Replacing a hard disk drive” in the ThinkStation Hardware Installation andReplacement Guide.Entering the Marvell BIOS Setup to configure SAS RAIDThis section describes how to enter the Marvell BIOS Setup to configure SASRAID.1. Your computer must have a Marvell SAS adapter card (Marvell SAS controller)installed to configure SAS RAID. For installing or replacing a Marvell SASadapter card, refer to “Replacing an adapter card” in the ThinkStation HardwareInstallation and Replacement Guide.2. Turn on the computer after you have installed the required number of SAShard disk drives and the Marvell SAS adapter card.3. Press Ctrl+M when prompted to enter the Marvell BIOS Setup to configure SASRAID.Configuring the Marvell BIOS Setup to enable SAS RAID 0, 1,or 5 functionalityTo enable SAS RAID 0, 1, or 5 functionality, use the Marvell BIOS Setupconfiguration utility as the SAS configuration utility. This utility assumes that thesystem has the required number of hard disk drives.1. Turn on your computer and press Ctrl+M when prompted to enter theMarvell BIOS Setup.2. On the Marvell BIOS Setup screen, use the arrow keys to select RAID Configand press Enter. The RAID Config menu opens.3. From the RAID Config menu, select Create array.4. Use the arrow keys and the Enter key to select each free hard disk drive thatyou want to include in the array.5. Select Next and press Enter.Chapter 6. Installing hard disk drives and configuring RAID 27