APC RAID Subsystem SCSI-SATA II - Manual (Page 54)

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1. Select “/ Volume config / Physical disk”.
2. Select the global spare disk by clicking the checkbox of the row, then
click “ “ to free disk.
Step 10: Done, all volumes have been deleted.
· Example 2
Example 2 is to create two UDVs in one VG. One UDV shares global cache
volume, the other uses dedicated cache volume. First, dedicated cache volume
should be created; it can be used in creating UDV. The last, delete them.
Each UDV is associated with one specific CV (cache volume) to execute the data
transaction. Each CV could have different cache memory size. If there is no
special request in UDVs, it uses global cache volume. Or user can create a
dedicated cache for indivifual UDV manually. Using dedicated cache volume, the
performance would not be affected by the other UDV’s data access.
The total cache size depends on the RAM size and set all to global cache
automatically. To create a dedicated cache volume, first step is to cut down
global cache size for the dedicated cache volume. Please follow the procedures.
Step 1: Create dedicated cache volume.
Figure 3.6.7.9
1. Select “/ Volume config / Cache volume”.
2. If there is no free space for creating a new dedicated cache volume, cut
down the global cache size first by clicking the blue square button
“
” in the size column. After resized, click “ ”
to return to cache volume page.
3. Click “ “ to enter the setup page.