30 Dec
2005
30 Dec
'05
11:56 p.m.
Item: 8744955990 on ebay
These look like RL01 packs, but RL01s are 5 MB ea. and these are
reportedly 2.5 MB ea.
What drive are they for?
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31 Dec
31 Dec
12:11 a.m.
----- Original Message -----
From: "Richard" <legalize at xmission.com>
To: <cctalk at classiccmp.org>
Sent: Saturday, December 31, 2005 8:56 AM
Subject: 2 Inmac 7724 Rigid Media 2.5 MB Disc Cartridges NOS NIB
Item: 8744955990 on ebay
These look like RL01 packs, but RL01s are 5 MB ea. and these are
reportedly 2.5 MB ea.
What drive are they for?
--
They look identical to the cartridges used on Philips 6875(?) disk drives.
One platter, hard sectored. The drive also could accomodate a "high density"
version, with was a whopping 5 MB
Nico
5:53 a.m.
Richard <legalize at xmission.com> wrote:
Item: 8744955990 on ebay
These look like RL01 packs, but RL01s are 5 MB ea. and these are
reportedly 2.5 MB ea.
What drive are they for?
The "grandaddy" of this physical cartridge is the IBM top-loading cartridge
(5440?) disk.
Many, many minicomputer systems use this physical form factor cart
with different (or sometimes the same, what a concept!) sectoring
and formatting in top-loading drives. Often with a fixed platter
as well.
DEC's innovation was to put embedded servo information on the
platter (factory formatted) and upping the density to 5 and then
10MBytes. They were justifiably proud to have succesfully done
an embedded-servo drive/cartridge system. But DEC's innovation
also means that generic non-embedded-servo-formatted carts won't
be usable on a RL01/RL02.
It's not quite as common as the IBM 2315 cart (front loading, which
spawned the Diablo, RK02/3/5, etc etc etc) but close.
Tim.
6712
days inactive
6712
days old
2 comments
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legalize＠xmission.com -
nico＠farumdata.dk -
shoppa_classiccmp＠trailing-edge.com