26 Mar
2024
26 Mar
'24
4:48 p.m.
On Mar 26, 2024, at 10:08 AM, Bill Gunshannon via
cctalk <cctalk(a)classiccmp.org> wrote:
On 3/26/2024 9:15 AM, Paul Koning wrote:
Don't know, but doubt it. Some of the disks have probably been used
for other purposes since the VAXen went away more than 20 years ago.
Chances are those were classic RAID systems, with fixed layouts across much of the RAID
set (not "mapped RAID") exposing what looks like a regular device LUN (no page
based virtualization). If so, there is only a limited set of possibilities, basically a
question of stripe sizes, drive count, and drive order. Given a guess (or better) of
what's on it, such as what file system type, the right layout would be clear from the
fact that it produces valid content.
It would be a pain to try this with modern complex SAN devices, but with those of 30+
years ago it's not quite so bad.
paul
On Mar
26, 2024, at 8:57 AM, Bill Gunshannon via cctalk <cctalk(a)classiccmp.org> wrote:
...
Do you have just part of the RAID set, or enough disks to make a complete one?
If the latter then it's a matter of reverse
engineering the RAID layout, which is likely to be doable.
While possible, I think hardly likely. I don't even remember what the
appliance was. Something DECish.