Accusys ExaRAID GUI - Manual (Page 66)

Using the RAID GUI
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2.6.3 Disk groups
This feature allows you to create, delete, and modify your disk group
settings.
• Create disk groups
Click Create to add a new disk group, where up to a maximum of 8
(single controller) / 32 (redundant controller model) disk groups can be
created. Specify the following options for configuration.
DG ID Select a DG ID from the drop-down menu.
Name Use the system default name as dgx. ‘x’ is the DG
identifier.
OR
Uncheck the ‘Use system default name’ box and
enter the name in the Name field. The maximum
name length is 63 bytes.
Members and
Spares Select member disks and spare disks to be
grouped.
Capacity to
Truncate (GB) Specifies the capacity to be truncated for the
smallest disk of this disk group.
This option is useful when the replacement disk
that is slightly smaller than the original disk. Without
this option, the capacity to truncate is 0GB.
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.
Write-zero
immediately When enabled, this function will start a
background task to write zero to all member disks
of the created disk group. The disk group can be
used for logical disks only after this process is
completed.
Note
The minimum number of member disks in a disk group is two.
Different disk groups may have a different number of member disks.
The number of member disks also determines the RAID level that can
be used in the disk group.