[TUHS] /dev/drum

Steve Nickolas usotsuki at buric.co
Tue Apr 24 09:57:44 AEST 2018

On Tue, 24 Apr 2018, 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 default.
> Not sure if Unix did that optimization, but I would hope so. (Never dug into 
> that part of the code.)

That reminds me of the Apple ][, whose original DOS put the directory and 
bitmap table on track 17 (0-indexed) on a 35-track floppy disk.


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