8 Jun
2015
8 Jun
'15
7:26 a.m.
On Tue, Jun 9, 2015 at 2:06 AM, Paul Koning <paulkoning at comcast.net> wrote:
Hmmm IBM used exactly the same trick - removable platter, with a fixed
platter below it - in 1969 with rather larger platters on their 5440
disk for the System/3... I have one of these; have had various things
to fix (some still unfixed!) but the disks have been entirely
reliable. Cartridges look very similar to RL02...
http://mit-a.com/Images/big/MFCM%20and%202%20disk%20drives.jpg
http://www.corestore.org
'No greater love hath a man than he lay down his life for his brother.
Not for millions, not for glory, not for fame.
For one person, in the dark, where no one will ever know or see.'
On Jun 8, 2015, at 10:02 AM, Mike Ross
<tmfdmike at gmail.com> wrote:
No, and I don?t think DEC ever made any drives like that. The removable cartridge drives
are all variations on the RK05: one or more platters wrapped in a plastic shell that has
an aperture for the heads to enter. The heads are in the drive.
The RC25 was one of the last cartridge drives (before fixed drives came back in small
sizes and exploding capacity), somewhat interesting because of its compact size, and very
odd and hard to use because the designers threw in a fixed platter. Perhaps they thought
that it was a good idea because it gave you double the capacity at modest extra cost, but
in practice it made for a major pain in the software and operationally. ...
Ugh OK, I've never laid hands on one as I said; for some reason I
thought the cartridge on these was a sealed unit containing the heads,
like some IBM drives, e.g. 3340? 