17 Sep
2019
17 Sep
'19
9:13 a.m.
On Sep 17, 2019, at 8:17 AM, Stefan Skoglund
<stefan.skoglund at agj.net> wrote:
m?n 2019-09-16 klockan 11:17 -0700 skrev Guy Sotomayor Jr via cctalk:
The problem (and I?d be thrilled to be wrong) is that the probability of having
a binary dump of Hydra is 0 for small values of 0. Part of the issue is that the
C.MMP has a few RP06 drives (4-6?). If it were ever saved, it would have to
be to 9-track tapes and I don?t recall any sort of backup facilities. The RP06
packs *might* still be around but I wouldn?t hold out too much hope for them
either.
TTFN - Guy
And that?s just the HW. Hydra (the OS that ran on C.MMP) was a
capability based system (so you needed the proper capability to do
anything). I recall at one point the grad student who was doing work
on the file system, ?lost? the root capability to the file system?so
it was no longer possible to create new file systems.
Which also means that for boot-strap you need to create a correct fully
populated binary dump of all the file system in the system.
A dump which is sane which regards to capabilities and user
capabilities ....
It is a little like kick-starting a database system ie writing the
system database (pg_system) into such a state that is it possible to
correctly run for example:
---
create tablespace 'stefan';
create schema 'pg';
---
and so on?