Accusys ExaRAID GUI - Manual (Page 67)

Using the RAID GUI
2-27
• Delete disk groups
Select the disk group(s) you want to delete and click Delete.
• Modify disk groups
To modify a setting, select a DG and click Modify. Specify the following
options for configuration.
Name Type a name associated for the DG ID.
Spare Disks Assign disks to be used as local spares.
Disk Cache This option enables or disables the on-disk cache
of hard disks in a disk group. When a new disk
becomes a member of the disk group (for
example, by disk rebuilding and cloning); the on-
disk cache uses the same settings as the disk
group.
LD Initialization
Mode The initialization mode defines how logical disks of
a disk group are initialized. Different disk groups
can have different initialization modes.
Parallel: The initialization tasks of logical disks are
performed concurrently.
Sequential: Only one initialization task is active at a
time.
LD Rebuild
Mode This determines how to rebuild logical disks in a
disk group. All logical disks can be rebuilt at the
same time or one at a time. Different disk groups
can have different rebuild modes.
Parallel: The rebuilding tasks are started
simultaneously for all logical disks in the disk group.
The progress of each rebuilding task is
independent from each other.
Sequential: Rebuilding always starts from the
logical disk with the smallest relative LBA on the
disk group, continues to the logical disk with the
second smallest relative LBA, and so on.
Prioritized: Similar to sequential rebuild mode, this
rebuilds one logical disk at a time, but the order of
logical disks to be rebuilt can determined by users.
Rebuild Task
Priority Low / Medium / High
This option sets the priority of the background task
for disk rebuild of disk groups.