Virtual Drive Definition

LSI 2108/2208 SAS MegaRAID Configuration Utility User's Manual

5. The Virtual Drive Definition screen displays, as shown below.

In the Virtual Drive Definition screen, configure the following options as needed:

RAID Level: Select the desired RAID level. The available options are:

•RAID 0 (data striping)

•RAID 1 (data mirroring)

•RAID 5 (data striping with parity)

•RAID 6 (distributed parity and disk striping)

•RAID 10 (striped mirroring)

•RAID 50 (striped mirroring)

•RAID 60 (distributed parity with two independent parity blocks per stripe)

Stripe Size: Select the desired stripe size.

Access Policy: Select the desired data access policy.

Read Policy: Select either Always Read Ahead or No Read Ahead. Selecting Al- ways Read Ahead will improve performance during sequential reads.

Write Policy: Select between the following options:

•Write-Through: Use this option to write data to both the controller cache and the drive once the data is retrieved.

•Write-Back With BBU: Use this option to write data only to the controller cache, provided that a battery backup is installed and functional.

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