[TUHS] i-nodes in middle of disk

Warren Toomey wkt at tuhs.org
Tue Apr 24 10:27:46 AEST 2018

On Tue, Apr 24, 2018 at 10:25:17AM +1000, Warren Toomey wrote:
>On Tue, Apr 24, 2018 at 01:44:06AM +0200, Johnny Billquist wrote:
>>Which is also why the file system for RSX (ODS-1) placed the index 
>>file (equivalent of the inode table) at the middle of the disk by 
>>Not sure if Unix did that optimization, but I would hope so. (Never 
>>dug into that part of the code.)
>Boston Children's Museum RK05 driver for 6th Ed springs to mind!

See the blurb for the UNSW 01 image here:

	Tape label: System Source Disk
		    DD format URK? BS=24B count=203 800bpi 9track
		    UNIX System Source 1 of 1

A distribution of UNIX source from UNSW, with several changes. record0.gz is
an RK05 image laid out according to the `Boston Children's Museum' format
(i-nodes in the middle). Latest file timestamp is Jan 24 1978. There is only
kernel source, plus a `unswbatch' directory. The latter seems to hold the
source to a UNIX batch system developed by Ian Johnstone and other at the
School of Electrical Engineering at UNSW.

record0.tar.gz is a tar archive of the RK05 image.

Cheers, Warren

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