Hard drive specifications may vary slightly depending on vendor.


                                   170 MB                  250 MB
                                  =================================
Formatted Capacity Per Drive       171.6 MB                256.0 MB
Drives Supported                   One                     One
Drive Height (with drive frame)    0.5 inch                0.5 inch
                                   (12.7 mm)               (12.7 mm)
Drive Size                         2.5 x 0.5 inches        2.5 x 0.5 inches
                                   (6.35 x 1.27 cm)        (6.35 x 1.27 cm)
Drive Type                         65                      65
Transfer Rate:
  Media                            14.3 - 22.1 Mbits/sec   35.9 Mbits/sec
  Interface                        4 MB/sec                4 MB/sec
Seek Times (including settling):
  Track-to-Track                   7 ms                    5.0 ms
  Average                          20 ms                   17 ms
  Maximum                          28 ms                   24.0 ms
Physical Configuration:
  Cylinders                        1440                    1704
  Heads                            4                       4
  Sectors/Track                    48 - 72                 92 - 54
  Bytes Per Sector                 512                     512
Logical Configuration:
  Cylinders                        873                     723
  Head                             16                      11
  Sectors/Track                    24                      63
  Bytes Per Sector                 512                     512
NOTE 1: Hard drive specifications may vary slightly depending on vendor.

[C] Date: Wed, 21 May 1997 16:51:19 -0700
From: Pavel Svitek 

Quantum ProDrive 40/80AT Configuration Guide

CMOS Values

Capacity           40MB     80MB
Cylinders           965      965
Heads                 5       10
Sectors              17       17
Write Precomp     65535    65535
Landing Zone        965      965

Note on Write Pre-compensation:
The Quantum ProDrive series drive does not require write pre-compensation,
your CMOS setting should be set to reflect that this feature is not
enabled. If the setting of 'none' is not present, the value 65535 is a
number that the BIOS will accept to disable this feature. 

Related Documentation:

Jumper definitions 

Quantum IDE disk drives have multiple jumper setting options and are used
to set specific drive features. The most common settings are used to define
the drive as the primary or secondary drive on the IDE cable. [Master /
Slave] Quantum IDE drives have additional jumper settings used for optional
features found on the drive. Listed below are the various jumper options
that may be found on Quantum IDE drives and the corresponding feature that
they enable.


DS Jumper - Drive Select 

Used to identify the drive as the primary [MASTER] drive in a single or
dual drive configuration. This is the factory default setting. 

SP Jumper - Slave Present 

Used only when the second [SLAVE] drive in a two drive configuration does
not support DASP. DASP (Drive active / drive 1 present) is a CAM (Common
Access Method) defined signal that indicates the presence of a second
drive, DASP is used during power on initialization and after a reset. Prior
to this definition, products were introduced which did not utilize this
method to detect the presence of a second drive. The SP jumper is used on
the MASTER drive, with the DS jumper, when the second drive does not
support DASP. 

CS Jumper - Cable Select 

Only used in systems that support the cable select feature. Cable Select
allows for each IDE disk drive to be jumped the same and the position on
the cable determines the ID. This requires a special cable and both drives
on the interface would have to support this feature. 

PK Jumper - Park [Spare] 

This jumper does not enable any feature. It is used, instead, to provide a
spare location to any jumper removed from the drive during a configuration
change. 


Jumper Settings

Single Drive: DS only
Master Drive: DS only
Slave Drive:  No jumpers

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