Date   : Wed, 22 Jul 1987 22:50:42 GMT
From   : ucsdhub!jack!dsi480!dtr@sdcsvax.ucsd.edu (DTR)
Subject: CORVUS DISK Salvage

Some of you may remember this request from a month or so ago.  Unfortunately,
a problem that I thought was dead has resurfaced...

I have a client running a Dec Rainbow out to a 20 MB Corvus hard disk
that was being backed up via a Mirror system to a VHS VCR.  A while ago
the disk started to go soft, and was cleaned (on the strength of 3
extant back ups) to give the diagnostics a chance to isolate the bad
sectors.  Once the disk had been cleared and the tracks locked out it
was time to restore the data and that is when the fun started.

The backups (all *3* of them) refused to resore properly and the system
just hung.   After confirming that the tapes did have data on them ( it
sure wasn't Gone With the Wind :-} ) we began to swap various and sundry
pieces of the lash up to try and isolate the problem and finally restore
the data.

It eventually became clear that the problem was neither the Rainbow, the
Corvus, the controller or the Mirror Card, but (apparently) the copy of
the mirror utilities themselves.

Corvus is attempting to deny that they have ever even seen a CP/M system
and soft-peddling the fact that a back-up is sight specific ( I can read
mine but not yours, due to level/alignment/driver-design problems).

SO...what I need at this point is a reliable copy of the Mirror
utilities and/or any suggestions as to how I can extract myself from
this never-ending disaster...

Thanks in advance....     Jack (..!man!dsi480!dtr)