APC RAID Subsystem SCSI-SATA II - Manual (Page 124)

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Figure H.4: a RAID 6 (size 2793G) VG is created.
2. Go to \Volume config\User data volume, create a UDV
Figure H.5: create UDV.
Figure H.6: setup capacity, stripe height, and block size for UDV.
Notice: When the OS is 64bit, user can set the block size to any available
value. If the OS is 32bit, user has to change the block size to larger values
than 512B. There will be a confirmation pop-up when UDV size is over 2TB
for reminding.
Figure H.7: choose “OK” for 64bit OS, choose “Cancel” for 32bit OS, this step will change
block size to 4K automatically.