Guy Sotomayor says:
> We had a similar problem when I was at IBM and we were developing a
> follow on to the PC/AT (it never shipped).
Was this the "PC II" (a "true" sequel to the PC) that magazines constantly
talked about IBM working on, until the PS/2 disappointed everyone?
--
Hello Paul,
Am 27.10.2020 um 17:33 schrieb Paul Koning via cctalk :
> The motor start surge current is a lot higher than the steady state current
I fondly remember my Seagate Elite 9GB (5.25“ double height), nominal 5400 RPM.
Power applied, it slowly spins until a certain speed and then
> On Oct 27, 2020, at 11:08 AM, Dave Wade G4UGM via cctalk
> wrote:
>
> ...
> I remember when doing standby power generator tests we had to remember to
> off-line all the drives at end of job, other wise they all tried to rewind at
> the same time
> .. and the generator could
> -Original Message-
> From: cctalk On Behalf Of Jon Elson via
> cctalk
> Sent: 27 October 2020 14:51
> To: nico de jong ; gene...@ezwind.net;
> discuss...@ezwind.net:On-Topic and Off-Topic Posts
>
> Subject: Re: Strange magtape anecdote
>
> On 10/27/2
On 10/27/2020 12:50 AM, nico de jong via cctalk wrote:
Hi all,
Back in the early 70's I was an operator on an IBM 360/40
with 4 tapedrives. Nobody could understand that sometimes
a tape transfer would stop saying "end of tape", mainly
around 3 PM,
It was also well-known that you should not
On 10/26/2020 11:24 PM, Guy Sotomayor via cctalk wrote:
It took us a while to figure several things out:
1) all of the machines were run with their covers off
I asked one of the mechanical / packaging guys at Microdata one time
what the hardest part
of making the cabinets and mechanical
On 10/26/2020 10:50 PM, nico de jong via cctalk wrote:
IBM 360/40 with 4 tapedrives.
the 3420 drives and I suspect their predecessors which were more common
on the 360s used
one light bulb to run the light from one bulb all over the drive.
The 3420's we had had a big box of spaghetti
We had a similar problem when I was at IBM and we were developing a
follow on to the PC/AT (it never shipped). We had a bunch of
prototypes in the lab running tests with stepper HDDs (rather than
voice coils) We kept having disk errors (failure to find track 0) when
running tests.
It took us a
Hi all,
Back in the early 70's I was an operator on an IBM 360/40 with 4
tapedrives. Nobody could understand that sometimes a tape transfer would
stop saying "end of tape", mainly around 3 PM, when not called for. It
was mainly one specific drive, but its two neighbours, one on each side,
Thanks for that Al. Never thought about humidity and mag tapes as
only time I used to backup data to 9 track tapes was in Vancouver
where humidity always high. Also used Time Shoppa's and Kevin
McGuigan's drives to extract data from those tapes in
Vancouver. Doubt I'll be copying any more
Hello Al,
Am 26.10.2020 um 17:01 schrieb Al Kossow via cctalk :
> There is a minimum RH specified for tape, but "tape heads depend on the
> moisture from the air" ??
First of all, my experiences are from ancient audio reel-to-reel tape. So maybe
I’m wrong. Also add the fact that „screwing
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