23 Mar
23 Mar
1:18 p.m.
Wai-Sun Chia wrote:
It's a Fujitsu. My guess it's a SMD drive?
it needs a converter box to get to SMD. SMD is 26 pin radial + 60pin
bus in most configurations.
this bus cable has 50 pins (25 visible). I have one of these somewhere,
it probably is a 40 or 80
meg drive.
Jim
1:48 p.m.
On 3/24/06, jim stephens <jwstephens at msm.umr.edu> wrote:
Wai-Sun Chia wrote:
So, what is the exact model name/number?
What systems is this drive meant for (host/adapter/interface)?
It's a Fujitsu. My guess it's a SMD
drive?
it needs a converter box to get to SMD. SMD is 26 pin radial + 60pin
bus in most configurations.
this bus cable has 50 pins (25 visible). I have one of these somewhere,
it probably is a 40 or 80
meg drive.
2:05 p.m.
Wai-Sun Chia wrote:
On 3/24/06, jim stephens <jwstephens at
msm.umr.edu> wrote:
So, what is the exact model name/number?
What systems is this drive meant for (host/adapter/interface)?
In the 83 time frame (which I got from the drive) these drives were
early samples,
and in some cases were productized. I reread the posting, and note that
the seller
says it is 20mb, which may be true. I had sample drives which were 5
10, 20 and
40mb in that time frame. The largest size drives then other than IBM
was around
100mb 14" winchester in this sort of drive. This was probably an early
8" or so
form factor sample drive.
As to what the inteface was. Everyone was trying to break the SMD interface
mold. At the time, the main interfaces were Trident and SMD. I believe
that SMD
had to be licensed, but I never got into that side of the business. I
know we could
and did make a generic Trident and SMD controller, and didn't have to
pay any
license.
The manufacturers would design all sorts of similar interfaces with
"features" but
the real thing was to put in something that would entice users to design
something
other than SMD.
I know that for the CDC drives, we got several drives like this and all
had boxes
with a couple of boards that converted what ever the drive had on it to
SMD. It
was not economical early on to put a full SMD hardware suite on all the
drives,
because the manufacturers were trying to reduce the cost of these
drives, as well
as the size, and other interface methods would let them do that as well.
We recieved at the company I worked for several drives from CDC,
Fujitsu, Toshiba,
as well as a couple from companies around here in Orange County, CA.
there was a really nice little SMD 5 1/4" drive that came out that we
had for a while
too, which name escapes me too.
Jim
3:01 p.m.
On Thu, 23 Mar 2006 11:05:09 -0800
jim stephens <jwstephens at msm.umr.edu> wrote:
there was a really nice little SMD 5 1/4" drive
that came out that we
had for a while too, which name escapes me too.
I have a 1 GB SMD 5 1/4" drive
from Seagate. I should get it hooked up
to my PDP-11/73. But, on the other side, the 9" NEC SMD disk is so much
nicer. Especially the sound. When the heads move it sounds like someone
is hiting the platers with a hamer. The backstroke from the moving head
assembly is stong enough to get a DEC BA123 moving.
(Disk + BA123 = 100 kg) :-)
--
tsch??,
Jochen
Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/
4:58 p.m.
On 3/24/06, Jochen Kunz <jkunz at unixag-kl.fh-kl.de> wrote:
On Thu, 23 Mar 2006 11:05:09 -0800
jim stephens <jwstephens at msm.umr.edu> wrote:
That's it! I *MUST* get a 9" disk!! :-)
(just to see a BA123 "walk") :-)
Heck why stop at 9"?
ooh now I remember, shipping and electricity :-{
there was a really nice little SMD 5 1/4"
drive that came out that we
had for a while too, which name escapes me too.
I have a 1 GB SMD 5 1/4"
drive from Seagate. I should get it hooked up
to my PDP-11/73. But, on the other side, the 9" NEC SMD disk is so much
nicer. Especially the sound. When the heads move it sounds like someone
is hiting the platers with a hamer. The backstroke from the moving head
assembly is stong enough to get a DEC BA123 moving.
(Disk + BA123 = 100 kg) :-)
--
24 Mar
24 Mar
4:45 a.m.
On Fri, 24 Mar 2006 05:58:50 +0800
"Wai-Sun Chia" <waisun.chia at gmail.com> wrote:
That's it! I *MUST* get a 9" disk!! :-)
(just to see a BA123 "walk") :-)
Hehehe. :-)
My NEC 9" disks where really high performance equipment for that time.
(Ca. 1986, 1 GB capacity.) They use a quite high acceleration to move
the heads. That is the reason for the movement.
Heck why stop at 9"?
May I say
"washing mashine"?
ooh now I remember, shipping and electricity :-{
Yes. One disk is 40 kg and needs 250 W to 300 W of power when idle.
--
tsch??,
Jochen
Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/
23 Mar
23 Mar
3:17 p.m.
"Wai-Sun Chia" <waisun.chia at gmail.com> wrote:
It's a Fujitsu. My guess it's a SMD drive?
Looking at the PCB, it has a 50-pin and a 20-pin connector.
Is that SA4000? The 50-pin connector was something like the 8"
floppy bus and the 20-pin connector was radial.
SMD is a 60-pin bus and a 26-pin radial connection.
The HDA's from some of the 2311-series Fuji SMD drives have
transparent covers and roughly the same form factor,
but not a clear cover the whole length.
The 228x series drives were SMD but much larger (19" wide, 30"
deep,10.5" hi) and have real nice transparent covers over the works.
Tim.
4:05 p.m.
On 3/23/2006 at 3:17 PM shoppa_classiccmp at trailing-edge.com wrote:
Looking at the PCB, it has a 50-pin and a 20-pin
connector.
Is that SA4000? The 50-pin connector was something like the 8"
floppy bus and the 20-pin connector was radial.
Sounds right. I could take a peek at one here if anyone's really
interested.
Cheers,
Chuck
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days inactive
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