Creating raid volumes – Lenovo ThinkServer TS140 User Manual
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• RAID 5: block-level striping with distributed parity
RAID 5 uses disk striping and parity data across all drives (distributed parity) to provide high data
throughput, especially for small random access. RAID 5 distributes parity along with the data and requires
all drives but one to be present to operate; drive failure requires replacement, but the array is not
destroyed by a single drive failure. Upon drive failure, any subsequent read operations can be calculated
from the distributed parity so that the drive failure is masked from the end user. The array will have data
loss in the event of a second drive failure and is vulnerable until the data that was on the failing drive is
rebuilt onto a replacement drive. A single drive failure in the set will result in reduced performance of
the entire set until the failing drive has been replaced and rebuilt.
RAID 5 requires a minimum number of three hard disk drives.
• RAID 10: a combination of RAID 0 and RAID 1
RAID 10 consists of striped data across mirrored spans. A RAID 10 drive group is a spanned drive
group that creates a striped set from a series of mirrored drives. RAID 10 allows a maximum of eight
spans. You must use an even number of drives in each RAID virtual drive in the span. The RAID 1
virtual drives must have the same stripe size. RAID 10 provides high data throughput and complete data
redundancy but uses a larger number of spans.
RAID 10 requires a minimum number of four hard disk drives and also requires an even number of drives,
for example, six hard disk drives or eight hard disk drives.
Configuring the system BIOS to enable onboard SATA RAID functionality
This section describes how to configure the system BIOS to enable onboard SATA RAID functionality.
Note: Use the arrow keys on the keyboard to make selections.
To enable SATA RAID functionality, do the following:
1. Start the Setup Utility program. See “Starting the Setup Utility program” on page 21.
2. Select Devices ➙ ATA Drive Setup.
3. Select Configure SATA as and press Enter.
4. Select RAID Mode and press Enter.
5. Press F10 to save changes and exit the Setup Utility program.
Creating RAID volumes
This section describes how to use the Intel Rapid Storage Technology enterprise option ROM configuration
utility to create RAID volumes.
To create RAID volumes, do the following:
1. Press Ctrl+I when prompted to enter the Intel Rapid Storage Technology enterprise option ROM
configuration utility during system startup.
2. Use the up and down arrow keys to select Create RAID Volume and press Enter.
3. Type a proper RAID volume name in the Name field and press Tab.
4. Use the arrow keys to select a RAID level in the RAID Level field and press Tab.
5. If appropriate, use the arrow keys to select a stripe size in the Stripe Size field and press Tab.
6. Type a volume size in the Capacity field and press Tab.
7. Press Enter to initiate volume creation.
8. When prompted, press Y to accept the warning message and create the volume.
9. If desired, return to step 2 to create additional RAID volumes.
10. When finished, select Exit and press Enter.
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