[TUHS] Unix v6 File System information

Dave Horsfall dave at horsfall.org
Sun Feb 21 20:01:24 AEST 2016

On Sun, 21 Feb 2016, Will Senn wrote:

> Is there a good source of information about the Unix v6 filesystem 
> outside of the source code itself? Also, is there a source for the 
> history of the early Unix filesystems from v6 onward?

Well, I could tell you exactly how the V6 FS worked, but it would take me 
over an hour to type it all in, so hopefully someone will come forward.

Dir entry: 14 chars (non-null term), plus 16 bit index into inode.

Inode table: a bit weird, involving single/double/triple block addresses 
into the disk itself.

And then we have the superblock (yep, only one, in those days).

Dave Horsfall DTM (VK2KFU)  "Those who don't understand security will suffer."

More information about the TUHS mailing list