
P R O D R I V E   E L S   4 2   A T    QUANTUM
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 3.5"/SLIMLINE         Cylinders    1536|  968|     |
Capacity form/unform    42/      MB        Heads           1|    5|     |
Seek time   / track  19.0/ 5.5 ms          Sector/track     |   17|     |
Controller           IDE / AT              Precompensation
Cache/Buffer             8 KB LOOK-AHEAD   Landing Zone
Data transfer rate    2.500 MB/S int       Bytes/Sector      512
                      4.000 MB/S ext
Recording method     RLL 1/7                        operating  | non-operating
                                                  -------------+--------------
Supply voltage     5/12 V       Temperature *C         4 50    |    -40 65
Power: sleep          1.0 W     Humidity     %         8 85    |      5 95
       standby        1.0 W     Altitude    km    -0.060  3.000| -0.060 12.000
       idle           2.8 W     Shock        g         6       |     70
       seek           3.0 W     Rotation   RPM      3663
       read/write     3.0 W     Acoustic   dBA        34
       spin-up            W     ECC        Bit   96
                                MTBF         h     250000
                                Warranty Month        24
Lift/Lock/Park     YES          Certificates     CSA,SDA,FCC,TUV,UL1950,VDE


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QUANTUM  PRODRIVE ELS 42/85/127/170AT  PRODUCT MANUAL 81-102823-02

  +---------------------------------------------------------+
  |                                             JP1+-+-+-+  |XX
  | +-+                                            +-+-+-+  |XX
  | | |                                            SP DS CS |XX
  | | |HDA                                                  |XX
  | +-+                                                     |XX AT-Bus
  |                                                         |.X  J41C
  |                                                         |XX
  |                                                         |XX
  |                                                         |XX
  |                                                         |XX
  |                                                         |X1
  |                                                         |
  |                                                         |XX Power
  |                                                         |XX1 J41B
  |                                                         |xx
  | +-+LED                                                  |XX Power
  | +-+                                                     |XX  J41A
  +---------------------------------------------------------+  1



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                      J   U   M   P   E   R   S
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QUANTUM  PRODRIVE ELS 42/85/127/170AT  PRODUCT MANUAL 81-102823-02

 Jumper setting
 ==============

 x = Jumper set at factory


 JP1  Drive Select/Cable Select/Slave Present
 --------------------------------------------
   +------+------+------+--------------------------------------------+
   |DS    |CS    |SP    | Description                                |
   +------+------+------+--------------------------------------------+
   |OPEN  |OPEN  |OPEN  | Slave Drive                                |
   |      |      |      | Compatible with drive using PDIAG- line to |
   |      |      |      | handle Master/Slave communications         |
   +------+------+------+--------------------------------------------+
   |OPEN  |OPEN  |CLOSED| Slave Drive                                |
   |      |      |      | The PDIAG- and DASP- lines are not driven  |
   +------+------+------+--------------------------------------------+
  x|CLOSED|OPEN  |OPEN  | Master Drive                               |
   |      |      |      | Uses DASP- to check for the presence of a  |
   |      |      |      | Slave                                      |
   +------+------+------+--------------------------------------------+
   |CLOSED|OPEN  |CLOSED| Master Drive                               |
   |      |      |      | Uses the SP jumper to determine whether a  |
   |      |      |      | Slave is present, without checking PDIAG-  |
   |      |      |      | or DASP-                                   |
   +------+------+------+--------------------------------------------+
   |OPEN  |CLOSED|   X  | Slave or Master Drive, depending on the    |
   |      |      |      | state of the Quantum Cable Select signal   |
   |      |      |      | (pin 28) at the IDE-bus interface          |
   |      |      |      | connector.                                 |
   |      |      |      | If the signal state is set to OPEN         |
   |      |      |      | (grounded) then the drive is configured a  |
   |      |      |      | if DS were CLOSED, described above. If the |
   |      |      |      | Cable Select signal is set to CLOSED       |
   |      |      |      | (high), then the drive is configured as if |
   |      |      |      | DS were OPEN, described above.             |
   +------+------+------+--------------------------------------------+

 X indicates the jumper setting does not matter.

 Caution: The CS and DS jumpers should never be installed at the same
          time.


 DS  Drive Select Jumper
 -----------------------
 You can configure two drives on the ATA Interface as Master (Drive 0)
 and Slave (Drive 1) using the DS jumpers. Set the CS jumpers to OPEN
 for each drive. Then, set the DS Jumper to CLOSED on one drive to
 configure that drive as Master. Set the DS jumper to OPEN on the
 other drive to configure as Slave.

 Note: For drives configured using the DS jumper, the order in which
       drives are connected in a daisy chain has no significance.


 CS  Cable Select Jumper
 -----------------------
 When two ProDrive ELS 42/85/127/170AT hard disk drives are daisy-
 chained together, they can be configured as Master and Slave by using
 the CS jumper or by using the DS jumper - BUT NOT BOTH. To configure
 the two drives using the CS jumper, set the CS jumper to CLOSED and
 the DS jumper to OPEN on each drive.

 Once you install the CS jumper, the drive is configured as a Master
 or Slave by state of the Cable Select signal, which is pin 28 at the
 IDE-bus interface connector. Quantum uses pin 28 as a vendor-specific
 pin; it does NOT conform to the function normally allocated for this
 pin according to the ATA (AT Attachment).

 Pin 28 is grounded - that is, set to OPEN - on the cable coming from
 the host. This configures the first drive as Master. Then, pin 28 on
 the connector at the second drive should be made an open circuit by a
 cut in signal line 28 in the cable from the first drive, so it
 becomes high - that is, set to CLOSED - due to a pull-up in the
 second drive. This configures the second drive as a Slave.


 SP  Slave Present Jumper
 ------------------------
 The SP jumper normally is not needed. However, when the ProDrive ELS
 42/85/127/170AT is configured as Master and is connected to a Slave
 drive that does not implement the Drive Active/Slave Present (DASP-)
 signal, it is necessary to set the SP jumper to CLOSED on the
 ProDrive ELS 42/85/127/170AT.


 J41A/B/C  DC Power/Interface Connector
 --------------------------------------
 The drive's DC power can be applied to either section A or B.
 The IDE-bus interface (40-pin) uses section C.

                J41 AT (40-pin)/DC (4-Pin & 3-Pin)
                Combination Connector
 +----------------------------------------------------------------+
 |                                               3-Pin    4-Pin   |
 |    40-Pin AT (J41 Section C)                  DC Power DC Power|
 |   +---------------------------------------+   J41B     J41A    |
 |   |o o o o o o o o o o o o o o o o o o o 1|  +-----+ +-------+ |
 |   |o o o o o o o o o o . o o o o o o o o o|  |o o o| |o o o o| |
 |   ++-------------------+------------------+  +3-2-1+ +4-3-2-1+ |
 +----+-------------------+---------------------------------------+
      |                   |
      Pin 40              Missing Pin
                          Pin 20

 J41A Pin 1  +12 VDC
          2  +12 VDC Return (Ground)
          3  + 5 VDC Return (Ground)
          4  + 5 VDC

 J41B Pin 1  + 5 VDC
          2  +12 VDC
          3  Ground



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QUANTUM  PRODRIVE ELS 42/85/127/170AT  PRODUCT MANUAL 81-102823-02

 Notes on installation
 =====================

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

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

 Orientation
 -----------
 The mounting holes on the ProDrive ELS 42/85/127/170AT hard disk
 drive allow the drive to be mounted in any orientation.


 Mounting
 --------
 Drive mounting orientation, clearance, and ventilation requirements
 are described in the following subsections. For mounting, #6-32 UNC
 screws are recommended. To avoid stripping the mounting-hole threads,
 the maximum torque applied to the screws must not exceed 8 inch-
 pounds.


 Drive Installation
 ------------------
 You can install the ProDrive ELS 42/85/127/170AT hard disk drive in
 an AT-compatible system in two ways:

 - To install the drive on a motherboard that contains a 40-pin IDE-
   bus connector, connect the drive to the motherboard using a 40-pin
   ribbon cable. Ensure that pin 1 of the drive is connected to pin 1
   of the motherboard connector.

 - To install the drive in a system without a 40-pin, IDE-bus
   connector on its motherboard you need an IDE-bus adapter kit. The
   adapter kit includes an adapter board and a ribbon cable, which is
   used to connect the board to the drive.

 Clearance
 ---------
 The printed-circuit board assembly (PCBA) is very close to the
 mounting holes. Clearance from the drive to any other surface -
 except mounting surfaces - must be 3.5 millimeters (0.14 inches)
 minimum. The specified screw length allows full use of the mounting-
 hole threads, while avoiding damaging or placing unwanted stress on
 the PCBA.


 Ventilation
 -----------
 The ProDrive ELS 42/85/127/170AT hard disk drives operates without a
 cooling fan, provided the ambient air temperature does not exceed
 122*F (50*C).


 DC Power (J41 A and B)
 ----------------------
 The recommended mating connectors for the +5VDC and +12VDC input
 power are listed above.

 J41A  4-Pin Connector:      AMP P/N 1-480424-0

       Loose piece contacts: AMP P/N 61173-4

       Strip contacts:       AMP P/N 350078-4

 J41B  3-Pin Connector:      Molex P/N 39-01-0033

       Loose piece contacts: Molex P/N 39-00-00341

       Strip contacts:       Molex P/N 39-00-0023

 Labels indicates the pin numbers on the connectors.


 IDE-Bus Interface Connector (J41C)
 ----------------------------------
 On the ProDrive ELS 42/85/127/170AT hard disk drive, the IDE-bus
 interface cable connector (J41 section C) is a 40-pin Universal
 Header.

 To prevent the possibility of incorrect installation, make sure the
 connector is keyed by removing Pin 20. Removing this pin ensures the
 connector cannot be installed upside down.

 For mating with J41 section C, recommended cable connectors include
 the following parts or their equivalents:

 AMP receptacle with strain relief     P/N 1-499506-0

 AMP receptacle without strain relief  P/N 1-746193-0

 To key the cable connector, you must plug the hole that corresponds
 to pin 20.

 Other recommended part numbers for the mating connector include:

 40-Pin Connector              3M 3417-7000 or equivalent

 Strain Relief                 3M 3448-2040 or equivalent

 Flat Cable (Stranded 28 AWG)  3M 3365-40 or equivalent

 Flat Cable (Stranded 28 AWG)  3M 3517-40 (shielded) or equivalent


 AT Interface Controller
 -----------------------
 The AT Interface Controller portion of the DCAIA provides data
 handling, bus control, and transfer management services for the IDE
 interface. It is capable of data transfer rates of up to 4 MB/s.
 Configuration and control of the interface is accomplished by the
  Controller across the MAD bus. Data transfer operations are
 controlled by the DCAIA Buffer Controller module.


 Disk Caching
 ------------
 The ProDrive ELS 42/85/127/170AT hard disk drive incorporates
 DisCache, a 32K (8K for the 42AT) disk cache, to enhance drive
 performance. This integrated feature can significantly improve system
 throughput. Read and write caching can be enabled or disabled using
 the SET CONFIGURATION command.


 Accoustics
 ----------
   +----------------+----------------+----------+
   |Operating Mode  | Measured Noise | Distance |
   +----------------+----------------+----------+
   |Idle On Track   | 32 dbA (mean)  | 39.3in   |
   |                | 37 dbA (max.)  | (1m)     |
   +----------------+----------------+----------+
   |Seeking (Random)| 36 dbA (mean)  | 39.3in   |
   |                | 41 dbA (max.)  | (1m)     |
   +----------------+----------------+----------+


 DC Motor Assembly
 -----------------
 Integral with the base casting, the DC motor assembly is a rotating-
 shaft, brushless DC spindle motor that drives the counter-clockwise
 rotation of the disks.



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                      F   E   A   T   U   R   E  S
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QUANTUM  PRODRIVE ELS 42/85/127/170AT  PRODUCT MANUAL 81-102823-02

 System Startup and Operation
 ----------------------------
 Once you have installed the ProDrive ELS 42/85/127/170AT hard disk
 drive and adapter board (if required) in the host system, you are
 ready to partition and format the drive for operation. To set up the
 drive correctly, follow these steps:

 1. Power on the system

 2. Run the SETUP program. This is generally on a Diagnostics or
    Utilities disk, or within the system's BIOS.

    The SETUP program allows you to enter the types of optional hard-
    ware installed - such as the hard disk drive type, the floppy disk
    drive capacity, and the display adapter type. The system's BIOS
    uses this information to initialize the system when the power is
    switched on. For instructions on how to use the SETUP program,
    refer to the system manual for your PC.

 3. Enter the appropriate parameters.

    During the AT system CMOS setup, you must enter the drive type for
    the ProDrive ELS 42/85/127/170AT hard disk drive. This procedure
    allows the system to recognize the drive by translating its
    physical drive geometry oarameters such as cylinders, heads, and
    sectors per track, into a logical addressing mode.

    ProDrive ELS 42/85/127/170AT drives can work with different BIOS
    drive-type tables of various host system. You can choose any drive
    type that does not exceed the capacity of the drive.

   +----------------------------------------------+
   |Logical Addressing Format                     |
   +---------------------+-----+-----+------+-----+
   |                     |42AT |85AT |127AT |170AT|
   +---------------------+-----+-----+------+-----+
   |Logical Cylinders    | 968 | 977 |  919 | 1011|
   |Logical Heads        |   5 |  10 |   16 |   15|
   |Logical Sectors/Track|  17 |  17 |   17 |   22|
   +---------------------+-----+-----+------+-----+

 4. Boot the system using the operating system installation disk.


 Formatted Capacity
 ------------------
 At the factory, the ProDrive ELS 42/85/127/170AT receives a low-level
 format that creates the actual tracks and sectors on the drive.


 Data Transfer Rates
 -------------------
 Data is transferred from the disk to the read buffer at a rate up to
 2.5MB/s in burst. Data is transferred from the read buffer to the AT
 bus at a rate up to 4.0 MB/s, using programmed I/O.


 Timing Specifications
 ---------------------
 +------------+-----------------+-----------------+------------------+
 |            | Typical Nominal | Maximum Nominal |Maximum Worst Case|
 | Parameters +-------+---------+------+----------+------+-----------+
 |            | 42AT  | 85/127/ | 42AT | 85/127   | 42AT | 85/127/   |
 |            |       | 170AT   |      | 170AT    |      | 170AT     |
 +------------+-------+---------+------+----------+------+-----------+
 |Single-track| 5.5ms | 5.5ms   | 6.5ms|  6.5ms   | 6.5ms|  6.5ms    |
 |Average Seek| 19ms  | 17ms    | 20ms |  18ms    | 21ms |  19ms     |
 |1/3-Stroke  | 20ms  | 18ms    | 21ms |  19ms    | 23ms |  20ms     |
 |Full Stroke | 37ms  | 33ms    | 38ms |  34ms    | 39ms |  35ms     |
 |Sequential  |       |         |      |          |      |           |
 |Head-Switch | 4ms   | 4ms     | 6ms  |  6ms     | 6ms  |  6ms      |
 |Ave. Latency| 8.2ms | 8.2ms   | 8.2ms|  8.2ms   | 8.2ms|  8.2ms    |
 +------------+-------+---------+------+----------+------+-----------+


 Reliability
 -----------
 Mean Time Between Failures (MTBF): 250,000 Power On Hours (POH),
                                    typical usage
 Preventive Maintenance (PM):       None required
 Mean Time To Repair (MTTR):        30 minutes
 Start/Stop:                        40,000 cycles (minimum)

 The Quantum MTBF numbers represent Bell-Core MTBF predictions at
 ambient operating conditions and represent the minimum MTBF that
 Quantum or a customer would expect from the drive. Quantum's ongoing
 reliability testing and field return data has historically confirmed
 an actual MTBF of twice the Bell-Core prediction.


 Error Detection and Correction
 ------------------------------
 As disk drive areal densities increase, obtaining extremely low error
 rate requires a new generation of soghisticated error-correction
 codes. Quantum ProDrive ELS 42/85/127/170AT series hard disk drives
 implement 112-bit single- and double-burst Reed-Solomon error
 correction techniques to reduce the uncorrectable read error rate to
 less than one bit in 1 x 10(14) bits read.

 When errors occur, an automatic retry and a more rigorous double-
 burst correction algorithm enable the correction of any sector with
 two burst of three incorrect bytes each or up to six multiple random
 one-byte burst errors. In addition to these advanced error correction
 capabilities, the drive's additional cross-checking code and
 algorithm double checks the main ECC correction to greatly reduce the
 probability of miscorrection.


