APC RAID Subsystem SCSI-SATA II - Manual (Page 130)

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Figure H.22: the new disk is ready to go, available size = 2.72TB.
Notice: if user setup 512B block size for UDV and the host/server OS is
32bit, in the last step of formatting disk, user will find OS cannot format the
area after 2048GB (2TB).
Figure H.23: wrong setting result: OS cannot format area after 2048GB (2TB)!