Large drives off of a Decstation 3100
Dirk Grunwald
grunwald at foobar.colorado.edu
Tue Jun 11 05:12:26 AEST 1991
>>>>> On 10 Jun 91 17:12:23 GMT, yzarn at lhdsy1.chevron.com (Philip Yzarn de Louraille) said:
PYdL> In article <12232 at jarthur.Claremont.EDU> jjensen at jarthur.claremont.edu (Jeff Jensen) writes:
>We're running Ultrix 4.1 Rev 52 off of a DecStation 3100. We are in the
>process of getting a new drive, of about 1.2gig. Now to the question...
>For some reason, I seem to remember hearing that there were problems
>running a disk of this size under Ultrix. Is this true, and if so, are
>there any patches? Any information/pointers to places to look would be
>appreciated.
PYdL> Nah. Just don't make any partition any bigger than 1 GB and you will be
PYdL> fine.
PYdL> --
--
wrong. If you're using a pre-4.2 Ultrix, you can not use more than
2^21 sectors in any given drive. The Ultrix SCSI drivers use a command
set that has sector numbers modulo 2^21; if you use more than 2^21,
you will e.g., over-write the superblock or things in the lower
portion of your disk. This is bad.
Ultrix 4.2 allegedly fixes this scsi driver. They may have a
limitation of 2^21 sectors per partition, I dunno.
Dirk Grunwald -- Univ. of Colorado at Boulder (grunwald at foobar.colorado.edu)
(grunwald at cs.colorado.edu)
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