The largest logical volume size supported by OpenVMS VAX is
as follows: V5.5-2, V5.5-2H4, and all prior versions: 8GB (2**24-1
blocks) V6.0 and later versions: 2TB (2**31-1 blocks)
All versions of OpenVMS Alpha support logical volumes up to 2TB.
By logical volume, we mean any disk or aggregation of disks that
appears in the system as a single logical unit. For example, a
stripe or RAID set constitutes a single logical unit. On the other
hand, a file system volume set consists of multiple logical units,
each of which is subject to the above limits. Because a file can
occupy multiple volumes of a volume set, using a volume set makes
it possible to have files greater than 8GB in size on a V5.5-2
system.
