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In article <1342@mitisft.Convergent.COM> Phil Burton writes:
>I would like the net's help to get specs on these drives:
>
>Miniscribe 8438.  Is this an RLL or MFM drive?
RLL, see below
>
>Maxtor 2190.  Is this 1024 or 1224 cyliners?
1224, see below.
>
>Supposedly, a Maxtor 1140 is just a 2190 that has been tested to "only" 918
>cylinders.  Does anyone run an 1140 to 1024 (1224 ???) cylinders?
>
>Comments?
>
>Phil Burton

I have also heard the about Maxtor 1140 -> 2190 possibility.  I have no
first hand knowledge.

The Western Digital Bulletin Board has geometry for many drives in a
file called DRVTALL.TXT.  The number for the BBS is 714-756-8176.  Here
is what it contains for your drives:

-----------------------------------------------------------10/2/89-----------
|       CAP   = CAPACITY IN FORMATTED MEGABYTES
|       CYC   = MAXIMUM NUMBER OF CYLINDER
|       H     = NUMBER OF DATA HEADS
|       RWC   = START REDUCED WRITE CURRENT
|               IF IT'S = CYC + 1 THEN IT IS NOT USED
|       WPC   = START WRITE PRECOMP
|               IF IT'S = CYC + 1 THEN IT IS NOT USED
|       ENC   = ENCODING METHOD R=RLL, M=MFM
|       RATE  = TRANSFER RATE IN MEGABITS/SEC
|       ACCESS= AVERAGE ACCESS TIME
|       SPT   = SECTORS/TRACK X 512 bytes
|       FH    = FULL HIGH FORM FACTOR
|       HH    = HALF HIGH FORM FACTOR
|       R     = RLL (run length limited)
|       N     = NRZ (non return to zero)
|       M     = MFM (modified frequency modulation)
|       SA    = STAND ALONE
|       Z     = ZBR
------------------------------------------------------------------------------
MAXTOR         408-432-1700
------------------------------------------------------------------------------
MODEL   ST-506  MFM      CAP   CYC  H  RWC  WPC ENC  RATE ACCESS  SPT COMMENTS
XT-1140          5.25 FH  119  918 15  919  919 M    5    27 MS   17
XT-2190          5.25 FH  159 1224 15 1225 1225 M    5    29 MS   17
------------------------------------------------------------------------------
MINISCRIBE     303-651-6000
------------------------------------------------------------------------------
MODEL   AT               CAP   CYC  H  RWC  WPC ENC  RATE ACCESS  SPT COMMENTS
        ST-506  RLL
8438              3.5"    32   615  4  616  128 R    7.5  68 MS   26
------------------------------------------------------------------------------

Hope this helps - Mark (davis@cs.unc.edu or uunet!mcnc!davis)