Lenovo ThinkServer RD330 Software User's Manual page 93

MegaRAID SAS Software User Guide
Figure 50: WebBIOS Virtual Drive Definition Screen
NOTE: The WebBIOS Configuration Utility shows the maximum available capacity while
creating the RAID 10 drive group. In version 1.03 of the utility, the maximum size of the
RAID 10 drive group is the sum total of the two RAID 1 drive groups. In version 1.1, the
maximum size is the size of the smaller drive group multiplied by two.
18. Change the virtual drive options from the defaults listed on the screen as needed.
Here are brief explanations of the virtual drive options:
— RAID Level: The drop-down menu lists the possible RAID levels for the virtual
drive. Select RAID 10.
— Strip Size: The strip size is the portion of a stripe that resides on a single drive in
the drive group. The stripe consists of the data segments that the RAID
controller writes across multiple drives, not including parity drives. For example,
consider a stripe that contains 64 KB of drive space and has 16 KB of data
residing on each drive in the stripe. In this case, the stripe size is 64 KB and the
strip size is 16 KB. You can set the strip size to 8, 16, 32, 64, 128, 256, 512, and
1024 KB. A larger strip size produces higher read performance. If your computer
regularly performs random read requests, choose a smaller strip size. The default
is 64 KB.
— Access Policy: Select the type of data access that is allowed for this virtual drive:
RW: Allow read/write access.
Read Only: Allow read-only access. This is the default.
Blocked: Do not allow access.
Chapter 4: WebBIOS Configuration Utility
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Creating a Storage Configuration
Page 93