On Jul 15, 13:39, David Betz wrote:
>
> Thanks for your suggestions!
>
> On Jul 15, 2004, at 1:03 PM, Antonio Carlini wrote:
> > B/R5:10000000 DKA400:
> >
> > (that's 1 followed by 7 zeroes).
> >
>
> I tried this and ultimately got the same "DKA400: is offline"
message.
> I guess it doesn't like this CD-ROM drive either. This is the last
one
> I have to try. Maybe I can find someone with one at VCF East
tomorrow.
I've not tried to boot a VAXstation 4000 from CD-ROM, but I've had no
problem with lots of other classic machines using older Toshiba drives.
Almost all modern (newer than about mid-90s) drives understand the
SCSI command to set the blocksize to 512 bytes in software, but older
machines don't know to do that. I keep a couple of Toshibas just for
that reason; XM3201, XM3301 and XM3401 at least have a couple of pairs
of half-moon solder pads, near the SCSI connector, normally linked for
2048-byte blocks, but you can cut the tracks between one or both to set
512-byte blocks. The three different 512-byte settings are supposed to
be for Sun, SGI, and Intergraph, but I've never noticed much
difference. OTOH, I have a couple of Hitachis and an NEC which can be
set to 512-byte blocks, and they don't work too well (the Hitachis in
particular are very slow and generate lots of errors), so apparently
not all CD-ROM drives are created equal.
--
Pete Peter Turnbull
Network Manager
University of York
Received on Thu Jul 15 2004 - 17:13:55 BST