[Info-vax] WTB: DSSI disks
Paul Sture
paul.nospam at sture.ch
Fri Nov 20 10:59:39 EST 2009
In article <E$jJgI2fyF82 at eisner.encompasserve.org>,
koehler at eisner.nospam.encompasserve.org (Bob Koehler) wrote:
> In article <787it6-sie.ln1 at Ubuntu.mike-r.com>, Mike Rechtman
> <mike at rechtman.com> writes:
> >>
> > IIRC there is/was a small storage box that took SCSI disks and connected to
> > DSSI
> > (BA10 or some such?) I know I've seen them in action.
>
> DEC's HSD05 was one such beast. Very small beast, physically. 8-)
Ah yes. There was a small wrinkle with the HSD05 in that the same disks
which could be attached direct to a SCSI controller would end up with a
slightly different MAXBLOCK size (something silly like 4 blocks
difference), which in those days meant we couldn't shadow across the two
interfaces. The HSD05 would also format a "new" disk when you connected
it, so you couldn't simply plonk a data disk in there for data transfer
purposes (we were looking at disaster recovery solutions at the time).
--
Paul Sture
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