[Info-vax] SET VOLUME/SIZE

[Phillip Helbig---undress to reply]

SET

  VOLUME

    /SIZE

          /SIZE[=nnn]

       Specifies the amount of disk space (in blocks) that is usable for
       the file system. This value must be greater than the current
       logical volume size and less than or equal to the physical
       size of the disk or the expansion limit (specified by /LIMIT),
       whichever is smaller.

       If the value is omitted, the usable space is increased to the
       physical size of the disk or the expansion limit, whichever is
       smaller.

Normally, one would add a larger disk to an existing shadow set, 
dismount all of the smaller members and add one or more additional 
larger members.  All this time, the shadow set has the logical volume 
size of the original all-small-disk shadow set.  SET VOLUME/SIZE then 
allows it to grow to the size of the larger disks.

So far, so good.

However, presumably it would be possible to have a scenario like that 
above except that the larger disks are not all the same size.  In that 
case, presumably SET VOLUME/SIZE with no argument would set it to the 
size of the smallest of the larger disks (after all the small ones have 
been dismounted from the shadow set).  Right?

(Of course, if INIT was done without /LIMIT, at some point one has to do 
SET VOLUME/LIMIT while the shadow set is mounted /NOSYSTEM in order for 
SET VOLUME/SIZE to be able to work later on.  I just created my first 
dissimilar-device shadow set as a test.  Works like a charm.)