
G O D R I V E   G L S   1 2 7   S    QUANTUM
                                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 2.5"/SUPERSLIMLINE    Cylinders    1395|     |     |
Capacity form/unform   127/      MB        Heads           3|     |     |
Seek time   / track  17.0/ 5.0 ms          Sector/track     |     |     |
Controller           SCSI2 SINGLE-ENDED    Precompensation
Cache/Buffer            96 KB              Landing Zone
Data transfer rate    2.938 MB/S int       Bytes/Sector      512
                      4.000 MB/S ext
Recording method     RLL 1/7                        operating  | non-operating
                                                  -------------+--------------
Supply voltage     5 V          Temperature *C         5 55    |    -40 60
Power: sleep          0.5 W     Humidity     %        10 90    |     10 90
       standby        1.3 W     Altitude    km    -0.061  3.048| -0.061 12.192
       idle           1.9 W     Shock        g        10       |    100
       seek           2.5 W     Rotation   RPM      3600
       read/write     2.5 W     Acoustic   dBA        33
       spin-up            W     ECC        Bit   112,REED SOLOMON
                                MTBF         h     350000
                                Warranty Month        12
Lift/Lock/Park     YES          Certificates     CSA,FCC,IEC950,TUV,UL1950,VDE


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QUANTUM  GODRIVE GLS 85/127/170/256 S  PRODUCT MANUAL 81-103563-02



        +--------------------------------------------------+
        |                                                  |
        |                                                  |
        +--------------------------J1----------------J2----+
        |+------------------------------------------------+|
        ||o o o o o o o o o o o . o o o o o o o 1  o o o 1||
        ||o o o o o o o o o o o o o o o o o o o 2  o o o 2||
        |40-----------------------------------------------+|
        +-----------SCSI-----------------------------------+
        +                                                  +



 J1 and J2 are fabricated from one 50-pin connector. J1 has 40 pins,
 J2 has 8 pins, and 2 pins have been removed at the boundry between
 J2 and J1.



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QUANTUM  GODRIVE GLS 85/127/170/256 S  PRODUCT MANUAL 81-103563-02

 Jumper Setting
 ==============

 x = Factory default


 GoDrive GLS 85/127/170/256 S drives have a single 2 x 25 connector
 (on 2mm centers) for both power and data. The connector also includes
 four pins which are used as factory test points (these pins must be
 allowed to float), for the SCSI device ID (J2 pins 5 through 7), and
 for a drive activity LED (J2 pin 8).


 J2  SCSI ID
 -----------
   +----------+-----------------------+
   | SCSI ID  |         Pins          |
   |          |   7   |   6   |   5   |
   +----------+-------+-------+-------+
   |x   0     | OPEN  | OPEN  | OPEN  |
   +----------+-------+-------+-------+
   |    1     | OPEN  | OPEN  | GROUND|
   +----------+-------+-------+-------+
   |    2     | OPEN  | GROUND| OPEN  |
   +----------+-------+-------+-------+
   |    3     | OPEN  | GROUND| GROUND|
   +----------+-------+-------+-------+
   |    4     | GROUND| OPEN  | OPEN  |
   +----------+-------+-------+-------+
   |    5     | GROUND| OPEN  | GROUND|
   +----------+-------+-------+-------+
   |    6     | GROUND| GROUND| OPEN  |
   +----------+-------+-------+-------+
   |    7     | GROUND| GROUND| GROUND|
   +----------+-------+-------+-------+



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QUANTUM  GODRIVE GLS 85/127/170/256 S  PRODUCT MANUAL 81-103563-02

 Notes on Installation
 =====================

 Installation direction
 ----------------------

     horizontally                           vertically
   +-----------------+             +--+                       +--+
   |                 |             |  +-----+           +-----+  |
   |                 |             |  |     |           |     |  |
 +-+-----------------+-+           |  |     |           |     |  |
 +---------------------+           |  |     |           |     |  |
                                   |  |     |           |     |  |
                                   |  |     |           |     |  |
 +---------------------+           |  +-----+           +-----+  |
 +-+-----------------+-+           +--+                       +--+
   |                 |
   |                 |
   +-----------------+

 Dimensions and Mounting
 -----------------------
 The drive can be mounted in any orientation. Maximum screw penetra-
 tion is 3 mm with a minimum penetration of three full threads. The
 maximum mounting torque for these screws is 40 inch-ounces.

 NOTE
 For optimum drive performance, the system mounting method should not
 result in any disortion or twisting of the drive's base casting. For
 example, if the drive is attached (via its bottom mounting holes) to
 a stiff mounting surface that does not meet the GoDrive GLS flatness
 requirements of 0.01 inch, then head switch times may be degraded.

 The threaded holes in each of the four corners of the GoDrive GLS are
 for top cover attachment only and should never be used for any other
 purpose.


 Ventilation
 -----------
 GoDrive GLS 85/127/170/256 S hard disk drives can operate without a
 cooling fan, provided the ambient air temperature des not exceed 55*C
 (131*F). Any user-designed cabinet must provide adequate air
 circulation to prevent the maximum temperature from being exceeded.


 Cable Connector
 ---------------
 GoDrive GLS 85/127/170/256 S drives have a single 2 x 25 connector
 (on 2mm centers) for both power and data. The connector also
 includes four pins which are used as factory test points (these pins
 must be allowed to float) for the SCSI device ID (J2 pins 5 through
 7), and for a drive activity LED (J2 pin 8).

 The recommended system mating connector is a 3M Series 150 50-pin
 connector or equivalent. The maximum cable length is 18 inches. The
 maximum cable length is 12 inches. To assure that the system cable
 connector is installed with the proper orientation, plug Pin 17
 hole on the J1 system connector.



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                      F   E   A   T   U   R   E  S
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QUANTUM  GODRIVE GLS 85/127/170/256 S  PRODUCT MANUAL 84-103563-02

 General Description
 -------------------
 Quantum's GoDrive GLS 85/127/170/256 S hard disk drives provide
 the high capacity, performance and reliability required by today's
 advanced 386- and 486-based notebook computers. The GoDrive GLS
 products offer outstanding performance, with fast time-to-data and
 outstanding sustained data transfer rates. These drives also offer
 low power consumption (0.2 watts standby). Fast spin-up times from
 the standby mode help conserve power and improve system response
 time.

 The GoDrive GLS hard disk drives provide extensive error correction
 capability, with features such as ECC on-the-fly which minimizes the
 impact of recoverable errors on throughput. The GoDrive GLS products
 feature highly reliable one,- two- and three-disk designs supported
 by a projected field MTBF of more than 350,000 hours. A one-year
 warranty is standard on GoDrive GLS drives purchased directly from
 Quantum or a authorized distributor or dealer.


 Features
 --------
 Key features of GoDrive GLS 85/127/170/256 S hard disk drives
 include:

 - Embedded SCSI controller

 - Fast time to data: < 17 ms average seek time and 8.3 ms latency

 - Fast spin-up from shutdown: less than 2.5 seconds

 - Lightweight (GLS 85 4.2 ounces, GLS 256 6.1 ounces)

 - 96KB cache buffer
   - DisCache look.ahead read caching firmware for faster data
     retrieval
   - WriteCache sophisticated caching technique to streamline write
     commands
   - AccuWrite system battery backup permits accumulation of write
     request in the buffer

 - Multiple-zone recording for fast sustained data transfer rates

 - Low parts count for increased reliability

 - 112-bit Reed Solomon Error Correction Code (ECC), with 48-bit
   double burst correction

 - Defect Free Interface firmware for automatic reassignment of new
   defective sectors without reformatting

 - Automatic actuator magnetic latch and dedicated landing zone

 - Excellent power management to preserve battery life

 - > 350,000 hour projected field MTBF

 - Automatic diagnostic testing power-up

 - High shock resistance, 250g non-operating (2ms)

 - One-year warranty

 - Low profile, optimized for number of disk


 Seek Time
 ---------
       +-------------------------------+--------+
       |                               |GLS SCSI|
       +-------------------------------+--------+
       |Track-to-Track      msec. typ. |   5    |
       +-------------------------------+--------+
       |Average             msec. typ. |  17    |
       +-------------------------------+--------+
       |Full-Stroke         msec.      |  24    |
       +-------------------------------+--------+
       |Latency             msec. avg. |   8.3  |
       +-------------------------------+--------+



 Quantum-Unique Drive Control Parameters, Page Code 39h
 ------------------------------------------------------
 SSID - SOFTWARE SELECTABLE ID (Byte 3, Bit 3):
 When set to zero, SSID indicates the SCSI ID will be determined
 by the value set using the hardware ID select. When SSID is set to
 one, the drive SCSI ID is determined by the value set in SCSIADR
 (Byte 3, bits 2-0). The default is zero.

 SCSIADR - SCSI Address (Byte 3, Bits 2-0):
 When SSID (bit 3 of byte 3) is set to one, SCSIADR determines the
 drive's SCSI ID. When chaning the SCSI ID with the MODE SELECT
 command, the SCSI ID will change immediately. If at initial power
 on, the SSID bit is set to one - that is, if this bit's previous
 setting was saved on the disk - the SCSIADR bit will determine the
 drive's SCSI ID. The default is zero.


 Number of Defects
 -----------------
 The factory limit for the number of defects per surface is 42 or one
 per megabyte of surface capacity. Any spare capacity not consumed at
 the factory is available for reallocation of field grown defects.
 The logical block address of a sector found defective in the field is
 reassigned thus maintaining the Defect Free Interface. It is
 reassigned to a spare sector physically closet to the defective
 sector. The physical address of the defective sector is added to the
 defect list. The defect list provides for a maximum of 292 entries.


