[TUHS] Unix v6 File System information

Will Senn will.senn at gmail.com
Mon Feb 22 01:21:30 AEST 2016

A technical description would be appreciated although the manpage looks like a good start as does Lions. I hadn't gotten to chapter 20 yet, should have known he would cover the topic.

Sent from my iPhone

> On Feb 21, 2016, at 7:34 AM, Dave Horsfall <dave at horsfall.org> wrote:
>> On Sun, 21 Feb 2016, Noel Chiappa wrote:
>> http://minnie.tuhs.org/cgi-bin/utree.pl?file=V6/usr/man/man5/fs.5
> Yeah, but I was unsure whether the OP wanted a technical description, or 
> one in plain English :-)  I'm still prepared to do the latter, once I can 
> find a spare hour.
> Somewhere, deep within Minnie's bowels, there might be a paper that I 
> wrote upon implementing a "bad block" system (specifically directed at the 
> RK-05, but generally applicable to any device); it involved the hitherto- 
> unused inode "0", to which were chained the bad blocks (added by hand).
> The trick was that normal FS utilities would ignore it...
> Someone at the time (Kevin Hill?) pointed out that inode "-1" could also 
> be used, but I wasn't prepared to go that far :-)
> -- 
> Dave Horsfall DTM (VK2KFU)  "Those who don't understand security will suffer."

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