Guest
https://www.dropbox.com/sh/epecht5ds6t63gd/AAC8Oxg2pz2bLv5Jo7dohiJPa?dl=0
This thing must weigh 40 pounds.
This thing must weigh 40 pounds.
M
Martin Riddle
Guest
On Thu, 29 Aug 2019 18:27:03 -0700, jlarkin@highlandsniptechnology.com
wrote:
dozens of those drives on one floor. I assume its from one of those
carousel type drives where you pull the platters up and out.
Cheers
wrote:
I had the opportunity to visit a data center in the 80's, they had
dozens of those drives on one floor. I assume its from one of those
carousel type drives where you pull the platters up and out.
Cheers
T
Tauno Voipio
Guest
On 30.8.19 05:46, Martin Riddle wrote:
Looks like the IBM 3330, or equivalent 100 Mbyte 20 surface drive.
The head movement was powered by +/- 45V 20A supplies.
--
-TV
Looks like the IBM 3330, or equivalent 100 Mbyte 20 surface drive.
The head movement was powered by +/- 45V 20A supplies.
--
-TV
T
Terry Newton
Guest
On Thu, 29 Aug 2019 22:46:37 -0400, Martin Riddle wrote:
In the mid 80's I operated a Wamg mini (still huge) with five
330 meg disk-pack drives.. when doing reorg (defrag today) they'd
shake violently. Once they had a floor tile up and a drive fell in,
still running fine. But if you bumped it too hard it would crash.
Had a program that would kick the drive if someone was leaning
on it.. get off me. Good times...
In the mid 80's I operated a Wamg mini (still huge) with five
330 meg disk-pack drives.. when doing reorg (defrag today) they'd
shake violently. Once they had a floor tile up and a drive fell in,
still running fine. But if you bumped it too hard it would crash.
Had a program that would kick the drive if someone was leaning
on it.. get off me. Good times...
J
Jon Elson
Guest
On Fri, 30 Aug 2019 16:49:07 +0300, Tauno Voipio wrote:
No, no no. You are a couple DECADES off. I'd guess, maybe, IBM 305
RAMAC, or something closer to that vintage. This is 1950's to early
1960's gear.
Jon
No, no no. You are a couple DECADES off. I'd guess, maybe, IBM 305
RAMAC, or something closer to that vintage. This is 1950's to early
1960's gear.
Jon
T
Tauno Voipio
Guest
On 30.8.19 21:38, Jon Elson wrote:
Have you ever handled one? I repaired some CDC's clones
in the seventies.
--
-TV
Have you ever handled one? I repaired some CDC's clones
in the seventies.
--
-TV
P
piglet
Guest
On 30/08/2019 7:38 pm, Jon Elson wrote:
It's hard to judge from the photos but I reckon definitely more 1960s
than 1950s. My reasoning is that one didn't see rainbow ribbon cables
until well into the 60s. Those diodes look more like those seen in 60s
and tywraps didn't supplant lacing until 60s. It could even be made as
late as 1970 as a late model of an older design.
piglet
It's hard to judge from the photos but I reckon definitely more 1960s
than 1950s. My reasoning is that one didn't see rainbow ribbon cables
until well into the 60s. Those diodes look more like those seen in 60s
and tywraps didn't supplant lacing until 60s. It could even be made as
late as 1970 as a late model of an older design.
piglet
C
Clifford Heath
Guest
On 30/8/19 11:49 pm, Tauno Voipio wrote:
The HP "washing machine" drives like this were 404MB, in use around
1982-86 to my knowledge, and had a similar mechanism. I have some of the
parts. The voice coil was roughly 10cm in diameter and throw, the
carriage perhaps 300g. The rollers run on a highly polished cylindrical
rod of tungsten carbide, which I now use to sharpen wood scrapers
. I
still have the drive power supply too, IIRC it's about +/- 40V and must
be almost 2kW, it's a seriously large transformer and the two filter
capacitors big enough to fit a wine bottle inside.
Clifford Heath
The HP "washing machine" drives like this were 404MB, in use around
1982-86 to my knowledge, and had a similar mechanism. I have some of the
parts. The voice coil was roughly 10cm in diameter and throw, the
carriage perhaps 300g. The rollers run on a highly polished cylindrical
rod of tungsten carbide, which I now use to sharpen wood scrapers
. I still have the drive power supply too, IIRC it's about +/- 40V and must
be almost 2kW, it's a seriously large transformer and the two filter
capacitors big enough to fit a wine bottle inside.
Clifford Heath
Guest
On Fri, 30 Aug 2019 16:49:07 +0300, Tauno Voipio
<tauno.voipio@notused.fi.invalid> wrote:
The original 3330 had two spindles of 30MB each (hence the 30-30 or
"Winchester" nickname). I believe they came out with the S/360 in
1969, give or take.
>The head movement was powered by +/- 45V 20A supplies.
<tauno.voipio@notused.fi.invalid> wrote:
The original 3330 had two spindles of 30MB each (hence the 30-30 or
"Winchester" nickname). I believe they came out with the S/360 in
1969, give or take.
>The head movement was powered by +/- 45V 20A supplies.