23 Mar
1998
23 Mar
'98
11:38 a.m.
According to my ancient HD reference textfile, there's a 93028-A and -AD.
The -AD is an IDE drive and the -A is an ST506 RLL drive. Specs are
identical, 19.86 MB, 69ms, 3.5" HH, 2/782/26 geometry.
Kai
-----Original Message-----
From: allisonp(a)world.std.com [SMTP:allisonp@world.std.com]
Sent: Monday, March 23, 1998 2:04 PM
To: Discussion re-collecting of classic computers
Subject: drive info needed
I have a WD93028A disk I know the geometry but the interface is
apparently IDE. It's currently attached to a 8bit ISA card (also from
WDC) and I'm curious about it.
What I need to know is what flavor of IDE it is (it may be 8bit)
and its pinouts.
Allison
23 Mar
23 Mar
7:23 a.m.
According to my ancient HD reference textfile,
there's a 93028-A and -AD.
The -AD is an IDE drive and the -A is an ST506 RLL drive. Specs are
identical, 19.86 MB, 69ms, 3.5" HH, 2/782/26 geometry.
Guys,
I was referring to:
http://theref.c3d.rl.af.mil/
This says:
Same physical specs:
782/2/27 - bit faster transfer.
For -A you could try 614/4/17 - more compatiable with old fixed bios.
-A is ATA 1:1
-AD is oddball drive ATA with slower 3:1
-X is XTA (aka 8 bit IDE interface with one side all grounded except
for one pin) This might looks like that hd with swapped logic board.
So, there is no ST-506 interface either MFM or RLL unless otherwise.
That is only 3 types of this same 93028 model and based on 40 pin IDE
interface. Unless this HD pack and logic board were built from junk
drives. That have happened before and logic boards and packs fail
very frequently. Oh, Be careful of that orange cable on that front
end. I have broke that one often.
When I bought first 386dx 25 when I was offered 40mb WD 93044A and I
asked for ST1102A instead because I do not want that "tandon" hd (hd
breaker) and that served me very well. :)
Jason D.
Kai
email: jpero(a)cgo.wave.ca
Pero, Jason D.
-----Original Message-----
From: allisonp(a)world.std.com [SMTP:allisonp@world.std.com]
Sent: Monday, March 23, 1998 2:04 PM
To: Discussion re-collecting of classic computers
Subject: drive info needed
I have a WD93028A disk I know the geometry but the interface is
apparently IDE. It's currently attached to a 8bit ISA card (also from
WDC) and I'm curious about it.
What I need to know is what flavor of IDE it is (it may be 8bit)
and its pinouts.
Allison
1:40 p.m.
Kai Kaltenbach wrote:
According to my ancient HD reference textfile,
there's a 93028-A and -AD.
The -AD is an IDE drive and the -A is an ST506 RLL drive. Specs are
identical, 19.86 MB, 69ms, 3.5" HH, 2/782/26 geometry.
Really ancient I guess, and possibly incorrect. They're 21 mb, all IDE 40 pin
interface. The -A is a faster IDE AT, the -AD is a 3:1 (slower) IDE AT and
the -X is an IDE XT. The access time is 70 ms for all three. The heads are 2
and the cylinders 782 (as above) but the sectors per track are 27, not 26
(typo??). The landing zone is 783 (not an auto parker/auto locker) and it's a
3.5" HH case. There is NO translation given for the drive specs so the
782/2/27 is what should be used. Since it's an IDE there should NOT be a low
level format performed on the drive.
The reference for TheRef that was given is a great reference but these specs
came from the most recent Pocket PCRef by Sequoia Publishing. I've always
found these to be extremely accurate.
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Phone: (502) 756-1749 Data/Fax:(502) 756-6991
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* Parts/Service/Upgrades and more for MOST Computers*
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8:45 a.m.
Kai Kaltenbach wrote:
SNip!
and the cylinders 782 (as above) but the sectors per
track are 27, not 26
(typo??). The landing zone is 783 (not an auto parker/auto locker) and it's a
3.5" HH case. There is NO translation given for the drive specs so the
782/2/27 is what should be used. Since it's an IDE there should NOT be a low
level format performed on the drive.
Oh no. They can take LLF. I have done that many time when I did
rebuilding these as fun experiments! This is real wonder that Nidec
motors was balanced very well that it just hum along with very soft
vibrations.
Jason
The reference for TheRef that was given is a great
reference but these specs
came from the most recent Pocket PCRef by Sequoia Publishing. I've always
found these to be extremely accurate.
What's this book costs?
Jason D.
email: jpero(a)cgo.wave.ca
Pero, Jason D.
9618
days inactive
9618
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jpero＠cgo.wave.ca -
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