22 Jan
2009
22 Jan
'09
3:42 a.m.
--- On Thu, 1/22/09, Josh Dersch <derschjo at mail.msu.edu> wrote:
It's an ancient hard disk platter, about 31"
in
diameter and maybe 1/8" thick. It's made by 3M and
has a label sporting a serial number and inspection
/waxing/etc dates from November of 1966. Any ideas what
kind of drive this would have belonged to? Any ideas on
capacity?
I've seen large platters like this on head-per-track disks
made by Burroughs. There's one on the Illiac IV at CHM.
I saw a similar drive at CMU that was allegedly the swapping
disk for a DEC KA-10. I vaguely remember being told that
the capacity was 512K words (36 bit on the KA-10). The
drive was designed for speed, not capacity.
--Bill