[Info-vax] Need help mounting shadow set

[VAXman- at SendSpamHere.ORG]

In article <0083cd72$0$30078$c3e8da3 at news.astraweb.com>, JF Mezei <jfmezei.spamnot at vaxination.ca> writes:
>Just a question out there...
>
>Would it be possible to do a low level format of the drive and somehow
>give it parameters to make those missing 480 blocks appear ?
>
>Or would it be possible to dismount the already populated drive, and set
>something in it that would remove 480 blocks from its stated capacity
>which, when mounted, would then allow the new disk to be included in a
>showdow set ?


I had to go back and sift through the original quoted-pukeable post to
extract this:

Disk $1$DKA100: (EESN), device type COMPAQ ST32171W,...

Total blocks        4110000    Sectors per track        165
Total cylinders        4982    Tracks per cylinder        5


Disk DSA0:, device type DEC RZ1BB-CS,...

Total blocks        4110480    Sectors per track         86
Total cylinders        2988    Tracks per cylinder       16


There are two fairly disparate geometries between the two drives.  It
might be possible to modify firmware to make the larger DEC RZ1BB-CS
not report 480 blocks but it would be far easier to use modern volume
shadowing which permits HBVS of disparate drives.

There's more info on the ST32171W here: 
http://www.seagate.com/support/disc/manuals/scsi/67491d.pdf

The only sage advice that I can offer here is: When purchasing drives,
purchase spares.
-- 
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