Lenovo ThinkStation S20, Hardware Manual

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Installing SAS hard disk drives and configuring RAID
This section contains information about the required number of SAS hard disk
drives for the supported level of RAID and SAS RAID configuration.
Installing SAS hard disk drives
Your computer must have the minimum number of SAS hard disk drives installed
for the supported level of RAID below:
v RAID Level 0 – Striped disk array
– Two hard disk drives minimum
– Better performance without fault tolerance
v
RAID Level 1 – Mirrored disk array
– Two hard disk drives minimum
– Improved read performance and 100% redundancy
v
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 tolerance
To install a new SAS hard disk drive, refer to the installation procedure in
“Replacing a hard disk drive” in the
ThinkStation Hardware Installation and
Replacement Guide .
Entering the Marvell BIOS Setup to configure SAS RAID
This section describes how to enter the Marvell BIOS Setup to configure SAS
RAID.
1. Your computer must have a Marvell SAS adapter card (Marvell SAS controller)
installed to configure SAS RAID. For installing or replacing a Marvell SAS
adapter card, refer to “Replacing an adapter card” in the
ThinkStation Hardware
Installation and Replacement Guide .
2. Turn on the computer after you have installed the required number of SAS
hard disk drives and the Marvell SAS adapter card.
3. Press Ctrl+M when prompted to enter the Marvell BIOS Setup to configure SAS
RAID.
Configuring the Marvell BIOS Setup to enable SAS RAID 0, 1,
or 5 functionality
To enable SAS RAID 0, 1, or 5 functionality, use the Marvell BIOS Setup
configuration utility as the SAS configuration utility. This utility assumes that the
system has the required number of hard disk drives.
1. Turn on your computer and press Ctrl+M when prompted to enter the
Marvell BIOS Setup.
2.
On the Marvell BIOS Setup screen, use the arrow keys to select
RAID Config
and 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 that
you want to include in the array.
5. Select Next and press Enter.
Chapter 7. Installing hard disk drives and configuring RAID (types 4105, 4157, 4217)
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