12 Mar
2002
12 Mar
'02
7:46 a.m.
While waiting and hoping for my SCSI controller, I
was curious if
anyone knows if its possible to burn a CD-ROM of the OS and my program, to
boot my 11/23 from a SCSI CD-ROM. I would assume the controller/OS would
just see this as a regular disk. The only problem I can think of would be
if something tried to write to the disk, which obviously wouldn't work.
My program doesn't write any files to the disk. As far as I can tell, the
OS doesn't either. Has anyone ever tried this?
I was mainly thinking CD-ROM would be nice option because if the
drive fails, the data is unaffected, and its easy and inexpensive to copy
CDs.
Yes, it is possible. The real trick is finding a SCSI CD-ROM that will work
with your SCSI Adapter! In my case I'm using a Viking QDT with a DEC RRD-42
drive (I think that's the right drive, it's the one that uses standard
caddies). I feel a lot safer being able to restore from CD's rather than
old flakey TK50's. Basically you just burn a disk image of a HD that's been
built on that controller to a CD-R. I've done this for RT-11, RSX-11M, and
RSX-11M+. Of the three RT-11 complains the least about being on CD. The
two RSX's I tried *really* don't like it, but appear to come up enough that
I should be able to copy them to a real HD.
Zane