Note: These hard drives are
mostly 50 or 68 pin SCSI. Features and Specification PDFs are not
available for all drives, so I grabbed the Product Summary instead.
Note: I do know most early
ThinkPads used either IDE or DBA-ESDI. Early non-MCA PS/2s used
MCA-IDE. Later PS/2s used MFM, ESDI (or even ST506) or SCSI.
The 9533, 9553, Reply upgrades, 9556 / 9557, and 9576 / 9577 systems
at a minimum, could potentially use one version of IDE or another.
If you are looking for 80 pin (SCA), SSA or FC-AL specs
(RS/6000), they most likely are available, but since I do not use
them (YET) they are not here.
j_mcspec.pdf DASD Storage Interface
Specification Micro Channel (REV 2.2)
(retrieved from Internet Archive)
Travelstar (2.5” mobile computers)
Deskstar (3.5” desktop computers)
Ultrastar (3.5” servers)
Other IBM disk drives
Drive |
Model |
Capacity |
Interface |
Speed |
0661 |
371 |
320 MB |
SCSI |
4316 RPM |
0661 |
467 |
400 MB |
SCSI |
4316 RPM |
0662 |
A10 |
1.05 GB |
IDE |
5400 RPM |
0662 |
S1x |
1.05 GB |
SCSI |
5400 RPM |
0663 |
E1x |
1-1.2 GB |
SCSI |
4316 RPM |
0663 |
L1x, H1x |
1 GB |
SCSI |
4316 RPM |
0664 |
CSH, ESH (5.25”) |
4 GB |
SCSI |
5400 RPM |
0664 |
M1H, N1H |
2 GB |
SCSI |
5400 RPM |
H2xxx |
H2xxx-Ax |
172-344 MB |
IDE |
3800 RPM |
H2xxx |
H2xxx-Sx |
172-344 MB |
SCSI |
3800 RPM |
H3xxx |
H3xxx-Ax |
133-342 MB |
IDE |
3800 RPM |
H3xxx |
H3xxx-Sx |
133-342 MB |
SCSI |
3800 RPM |
WDA |
L4x |
40-42 MB |
IDE |
3600 RPM |
WDA |
L80, L160 |
80-160 MB |
IDE |
3600 RPM |
WDA |
240, 280 |
40-80 MB |
IDE |
3600 RPM |
WDA |
S260, 2120 |
60-120 MB |
IDE |
3600 RPM |
WDA |
380, 3160 |
80-160 MB |
IDE |
3600 RPM |
WDS |
L4x, LC40 |
40-42 MB |
SCSI |
3600 RPM |
WDS |
L80, L160 |
80-160 MB |
SCSI |
3600 RPM |
WDS |
240, 280 |
40-80 MB |
SCSI |
3600 RPM |
WDS |
3100, 3200 |
108-216 MB |
SCSI |
4320 RPM |
WDS |
380, 3160 |
80-160 MB |
SCSI |
3600 RPM |
Peter Wendt talks of earlier SCSI Drives:
It is better to buy appropriate drives for the purpose: 50-pin types
like the DORS for the desktops with onboard SCSI or "Tribble" /
"Spock" / "Spock Prime", DCAS, DCHS in 68-pin for the Fast / Wide
arrangement in Server 85 and 95 Non-Array and DFHS, DCHS, DDRS in
68-pin version for the Server 95 Array / Server 3xx, 5xx "Hot Swap"
bays. These drives were designed to fully support the Hot Swap
function - which is not the case on the "workstation drives" DCAS
and DORS.
0662? (Spitfire) and DFHS are not recommended if you plan to sit
next to the machine. There running loud, hot and are power hogs.
Same with DFRS to avoid like the plague
Today's reading from the Oracle of Lemgo, Peter the Wendt, goes
thusly-
DFHS
Use them externally in an enclosure with
sufficient room and additional fans with enough airflow in length
over the drives. IBM made pretty bad first series DFHS. They
were hot, loud and had problems with the internal controller
microcode as well as with the surface coating which leads to
"sudden death".
There were "active cooled" 5.25" bays - which
have two of these noisy "trouser button" fans ... which (in
theory) should keep the drives cool enough. Practice shows, that
these thingies are only nerving loud and fail occasionally (like
CPU fans - they are similarly lousy). DFHS are -like the Quantum
Atlas II and III- intended for servers which supply active
cooling. Parts of the DFHS heat up to 95C
The older DFHS series 1 (the "Fat Ones") get really hot - and are
not recommended. Towards the end of the series the drives get
better.
DFRS
Keep away from DFRS - they are "refurbished" (hence -R-) DFHS that
had been sent back for repair and returned to the spares cycle.
These "refreshed" drives have a large black stripe on the barcode
label with white "RE" in it atop. They are second choice.I had
three of them - all are dead in the meantime."
> My tip, try to get DCAS, DDRS or even DNES drives and
try to get a
fast/wide (corvette) controller.
DDRS
7.200 rpm version of the DCAS. They're 7.200rpm - but don't make
much noise. The DDRS finally was the 3rd generation drive (after
DFHS and DCHS) where they learned to handle the problems. I have 7
of them in my Server 520 (DDRS-34560 UW, some LVD) along with 2 x
DCHS and 2 x Quantum Atlas. The DDRS is available as 50, 68 and 80
pin version. For
the Server 95A "non Array" with F/W "Corvette" I would pick the
68-pin version and tailorize an appropriate SCSI 68-pin cable. The
DDRS superseded the DCHS, which superseded the DFHS.
DNES
The follow-up to the DDRS was the DNES, which is a good 7.200rpm
drive and viable at ebay in masses. Short-lived because 10.000 rpm
DRVS came out. The DNES ran parallel with he DRVS for some time.
DCAS
Not a bad drive - but a 5.400 rpm type. The DCAS was designed for
desktops / workstations rather than servers. But they were
suitable for smaller servers as well - especially when they were
"power-wise and thermally challenged" (mean: small power supply
and bad internal ventilation). The DCAS runs pretty cool - only
topped by its successor DORS. The DCAS is a nice, fast and
low-noise drive.
DORS
5.400 rpm rated 5V/300mA and 12V/200mA, which makes a total of a
lousy 4Watts .....It is my favorite desktop drive in old PS/2s (56
/ 57, 76 / 77) *because of* its low power consumption.
DPES
"Pegasus" drive is a 5.400 rpm drive designed for desktops. It has
about 50% lower current draw and -therefore- runs significantly
cooler than the DCHS. With the introduction of the DSAS and DPES
series IBM returned to other conceptions of the R/W-amplifiers and
different screening of the drive. These are rock-solid general
purpose drives, which need no special treatment."
... I've had the "pleasure" of dealing with literally thousands of
IBM SCSI hard drives over the past several years. In the 9.1GB
size, the DDRS, DNES and DPSS all did well -- very few bad drives,
they all have good reliability. The DCHS family I would avoid
-- we had about a 5% fallout rate after several months of use.
The DDYS family was better than DCHS, but not as good as
DDRS/DNES/DPSS. For a sample size of only one or two, it's
hard to say, because you might have the good luck to get one of the
"better" drives in the lot, or you might have the bad luck to get
one of the few "bad" drives.
DDYS
Ed. Not a bad drive, but check on the fab. The DDYS fabs were in
Japan, two in Thailand, one in Singapore, and one in Hungary.
IBM WILL OFFICIALLY officially close a hard drive plant in Hungary
by the end of November, "due to weak global demand", it was revealed
today.
Source
Our sources, however, reveal that the real reason for the Hungary
pullout is because of extremely poor quality, and major product
control and quality control failures.
Peter wrote:
...some outstanding poor-quality DDYS 36GB's ... that failed after a
few weeks when been hard ridden in RAIDs. My own record was 24
drives in 2 days for one customer... Argh ! The lot of them were made on
Saturdays and Sundays according to the date-of-mfg stamp. Judge
yourself. IBM claimed it were caused by a change of the magnetic
coating - but I could prove that it was in fact largely day-of-the-week
dependent. At least for 9 out of 10 dead drives. Imagine the funny
faces they made when being confronted with my list.)
|