From: thad@cup.portal.com (Thad P Floryan)
Newsgroups: comp.sys.hp
Subject: Re: scsi & HP
Date: 5 Apr 92 14:16:30 GMT
Organization: The Portal System (TM)

Hmmm, all this banter about H-P not being the manufacturer of the 97549 just
makes me laugh.  I suppose H-P also doesn't manufacture the 97544 and the
97548 drives?  :-)

To settle this mess once and for all, enclosed are what I posted last month
to comp.periphs.scsi about these drives in answer to someone else who was
having problems configuring them on some SGI and Unisys machines.  Also note
my corrections to the H-P manual which is, by the way, H-P Part No. 5960-0112,
"OEM Product Specifications Manual".

As regards standards and conformance of H-P drives, I use my 97549 drives on
my Sun and Amiga computers, both at home and at work (yes, I have both Suns and
Amigas at home and at work).  H-P, and note I'm saying H-P, sells the 97549
drives in single boxes and in 4-paks.  They're cheaper if you buy pallets of
the 4-paks.  And they're "Damn Fine Drives"(tm), typical H-P high quality; I
expect these drives to be still operating come the year 2000.

Sheesh.

Thad Floryan [ thad@btr.com (OR) thad@cup.portal.com ]

-------------------- begin enclosure 1

           H-P DISK MODELS [97544, 97548, 97549] DISK DRIVE CAPACITIES


Unformatted capacities in the following table are calculated excluding embedded
servo information.  Formatted capacities are calculated using a 512-byte
sector.  When other sector sizes are used, formatted capacities will change.


MODEL:              HP 97544             HP 97548                HP 97549
               unfrmted formatted   unfrmted  formatted     unfrmted  formatted

DATA
SURFACES:             8         8          16        16           16         16

TRACKS PER:
Surface (1):       1457      1447        1457      1447         1921       1911
Drive:            11656     11576       23312     21152        30736      30576

SECTORS PER:
Track (2):           57        56          57        56           65         64
Surface:          83049     81032       83049     81032       124670     122112
Drive:           664392    648256     1328784   1296512      1997840    1956864

DATA BYTES PER:
Sector (3):         599       512         599       512          590        512
Track:            34143     28672       34143     28672        38350      32768
Surface:       49746351  41488384    49746351  41488384     73670350   62619648
Drive:        397970808 331907072   795941616 663814144   1178725600 1001914368


Notes:

(1)     Seven physical tracks are reserved as spares, one is for defect list
        storage, one is a maintenance track, and one is reserved, leaving
        1447 [97544/48] or 1911 [97549] user accessible tracks.

(2)     One physical sector is reserved as a spare, leaving 56 [97544/48] or
        64 [97549] user accessible sectors.

(3)     There are an additional 58 [97544/48] or 67 [97549] bytes in each
        intersector gap that contain embedded servo information and speed
        tolerance bytes.


Thad

P.S. The tables (above) correct some errors on page 1-4 in their OEM Product
Specifications Manual, H-P Part No. 5960-0112.   The only spec on the manual
page that still seems in error is the "590" for the unformatted data bytes
per sector for the 97549; I believe the number should be "599" to agree with
that for the 97544/48.

-------------------- begin enclosure 2

           H-P DISK MODELS [97544, 97548, 97549] DISK DRIVE JUMPERS


  POWER      ========= JUMPERS ==========    ==== SCSI CONNECTOR ====
 _______     2
[O_O_O_O]    : [:][:][:][:][:][:][:][:][:]   :::::::::::::::::::::::::
             1  1  2  3  4  5  6  7  8  9                            1
             |  `+'   |  |  |  |  `--+--'
             |   |    |  |  |  |     |___ SCSI ID, weighted 4,2,1 respectively
             |   |    |  |  |  |
             |   |    |  |  |  |__ AUTO SPIN: 0=requires start unit command
             |   |    |  |  |                 1=drive spins on power-up
             |   |    |  |  |__ PARITY: 0=disabled, 1=checking enabled
             |   |    |  |
             |   |    |  |__ Drive initiation of SDTR message per:
             |   |    |          0=inhibit initiation of SDTR message
             |   |    |          1=enable initiation at Power On and Reset
             |   |    |__ UNIT Attention: 0=enabled (std default), 1=disabled
             |   |
             |   |___ TERMPWR options per:
             |            10 (all drives) drive supplies +5 for on-board
             |                            terminators ONLY
             |            11 (all drives) drive supplies +5 for on-board
             |                            terminators, and onto SCSI pin 26
             |            01 (single-ended drives) initiator supplies +5 on
             |                            SCSI pin 26 for on-board terminators
             |               (differential drives) initiator supplies +5 on
             |                            SCSI pins 25 & 26 for on-brd termin
             |            00 no power supplied by drive to on-board terminator
             |               or to pin 26, and SCSI pin 26 is NOT connected to
             |               on-board terminators.
             |
             |___ Synchronized Spindle Pins: 1 is Ground, 2 is SYNC

-------------------- end enclosures
Newsgroups: uiuc.sys.hp,comp.sys.hp