[TUHS] /dev/drum

[Charles Anthony]

On Fri, Apr 20, 2018 at 9:45 AM, Noel Chiappa <jnc at mercury.lcs.mit.edu>
wrote:

>     > From: Warner Losh
>
>     > Drum memory stopped being a new thing in the early 70's.
>
> Mid 60's. Fixed-head disks replaced them - same basic concept, same amount
> of
> bits, less physical volume. Those lasted until the late 70's - early PDP-11
> Unixes have drivers for the RF11 and RS0x fixed-head disks.
>
> The 'fire-hose' drum on the GE 645 Multics was the last one I've heard
> of. Amusing story about it here:
>
>   http://www.multicians.org/low-bottle-pressure.html
>
> Although reading it, it may not have been (physically) a drum.
>
>
Correct; it was a fixed head disk; nicknamed firehose for the high data
rate. I am not sure if this is the exact model number, but it was a
Librafile device:

https://archive.org/stream/TNM_Librafile_3800_mass_memory_from_Librascope_-__20170825_0139#page/n0/mode/2up

-- Charles
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