Supermicro X13SWA-TF User Manual page 118

Super X13SWA-TF User's Manual
Select Disks:
Select the desired RAID disks one by one by setting them to X. The options are (not
selected) and X (selected).
Strip Size: (Available for RAID0/RAID5/RAID10 Only)
Use this feature to select the RAID strip size. The options are 4KB, 8KB, 16KB, 32KB,
64KB, and 128KB. The available options are based on the setting of "RAID Level" above.
Capacity (GB):
This feature allows you to enter the desired RAID capacity (in GB).
RWH Policy (Available for RAID5 Only)
Select a desired RAID Write Hole (RWH) policy when RWH occurs. If no disk has been set
as a journaling drive, the options are Distributed PPL and Disable. If any disk has been
set as a journaling drive, the options are Distributed PPL, Journaling Drive, and Disable.
For details on creating a journaling drive, refer to the
Note 1: A RWH occurs when a drive failure and power failure happen simultaneously or
close to each other during the write. The events of a drive failure and power failure are
connected and can lead to irrecoverable data or silent data corruption. This is caused
by the lack of atomicity of write operations across the disks in the RAID.
Note 2: Partial parity logging (PPL) can be defined as the result of XOR calculation
of old data and old parity. PPL is a feature available only for RAID5 volumes. While a
power/drive-failure/crash occurring, PPL information helps rebuild the RAID volume and
reduce the potential data loss.
Select RWH Journaling Drive (Available for RAID5 Only)
If a journaling drive has been created and RWH Policy is set to Journaling Drive, select a
desired journaling drive.
Create Volume
Use this feature to create a RAID volume with the settings above. The options are Yes
and No. After selecting Yes, you will return to the previous screen displaying the infor-
mation about the created RAID volume. You can click the created RAID volume to view
more information.
Delete (a RAID Volume)
To delete a RAID volume you have created, take the steps below:
1. Select Advanced -> Intel(R) VROC SATA Controller.
2. Select the RAID volume to be deleted and then select Delete.
Non-RAID Physical Disks
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