On Fri, Jan 9, 2015 at 1:18 AM, Noel Chiappa <jnc@mercury.lcs.mit.edu> wrote:

Just out of curiousity, why don't you set the SR before you boot the machine?
That way it'll come up single user, and you can icheck/dcheck before you go
to multi-user mode. I prefer doing it that way, there's as little as possible
going on, in case the disk is slightly 'confused', so less chance any bit-rot
will spread...

Right and it's probably worth digging up the v6 version of fsck. I had it on tape but I worry that it might be 800 bpi which I have lost the ability to read. I need to find a working TS08.

Also remember for early UNIX, ps "knew" about some kernel data structures and had to compiled with the same sources that your kernel used if you want all the command field in particular to look reasonable.

I've forgotten when that got fixed, my memory is that V7 still had vestiges of that issue i.e. it was not until post 4.1BSD that got ps got more independant. That said, until V8 and /proc that user mode utilities like that got really cleaned up.

Clem