
P R O D R I V E   L P S   5 2 5   A T    QUANTUM
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 3.5"/SLIMLINE         Cylinders        | 1017|     |
Capacity form/unform   525/      MB        Heads           6|   16|     |
Seek time   / track  10.5/ 3.0 ms          Sector/track     |   63|     |
Controller           IDE / AT              Precompensation
Cache/Buffer           512 KB SEGMENTED    Landing Zone
Data transfer rate    3.750 MB/S int       Bytes/Sector      512
                     10.000 MB/S ext DMA
Recording method     RLL 1/7                        operating  | non-operating
                                                  -------------+--------------
Supply voltage     5/12 V       Temperature *C           55    |    -40 65
Power: sleep              W     Humidity     %         8 85    |      5 95
       standby            W     Altitude    km            3.000|        12.000
       idle           8.0 W     Shock        g         6       |     60
       seek          11.2 W     Rotation   RPM      4500
       read/write    11.0 W     Acoustic   dBA        38
       spin-up            W     ECC        Bit   112,REED SOLOMON
                                MTBF         h     250000
                                Warranty Month        24
Lift/Lock/Park     YES          Certificates     CSA,FCC,TUV,UL1950,VDE


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                        L   A   Y   O   U   T
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QUANTUM  PRODRIVE LPS 525AT  PRODUCT MANUAL 81-103305-01, 12/92

  +---------------------------------------------------------+
  | +-+                                +-+-+-+-+-+ +-+-+-+J9|XX
  | | |                                +-+++-+-+-+ +-+++++  |XX
  | | |                                   CS         SP DS  |XX
  | | |                                                     |XX
  | | |                                                     |XX AT-Bus
  | | |                                                     |.X  J1
  | | |                                                     |XX
  | | |                                                     |XX
  | +-+                                                     |XX
  |                                                         |XX
  |                                                         |X1
  |                                                         |
  |                                                         |xx
  |                                                         |xx
  |                                                         |xx
  | +-+LED                                                  |XX Power
  | +-+                                                     |XX  J3
  +---------------------------------------------------------+  1



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                      J   U   M   P   E   R   S
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QUANTUM  PRODRIVE LPS 525AT  PRODUCT MANUAL 81-103305-01, 12/92

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

 x = Jumper set at factory


 J9  Drive Select/Cable Select/Slave Present
 -------------------------------------------
   +------+------+------+--------------------------------------------+
   |DS    |CS    |SP    | Description                                |
   +------+------+------+--------------------------------------------+
   |OPEN  |OPEN  |OPEN  | Slave Drive                                |
   +------+------+------+--------------------------------------------+
   |OPEN  |OPEN  |CLOSED| Self Seek mode.                            |
   +------+------+------+--------------------------------------------+
  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 AT-bus connector.          |
   |      |      |      | If the signal state is set to OPEN         |
   |      |      |      | (grounded) then the drive is configured as |
   |      |      |      | if DS were CLOSED, described earlier. If   |
   |      |      |      | the Cable Select signal is set to CLOSED   |
   |      |      |      | (high), then the drive is configured as if |
   |      |      |      | DS were OPEN, described earlier.           |
   +------+------+------+--------------------------------------------+

 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 also daisy-chain two drives on the IDE-bus Interface as
 by using the DS (Drive Select) jumpers. If the DS jumper is
 installed, the CS jumper must be removed (OPEN).

 To configure a drive as the Master (Drive 0), a jumper must be
 installed at the DS pins.

 To configure a drive as the Slave (Drive 1), the DS jumper must be
 removed.

 NOTE
 The order in which drives are connected in a daisy chain has no
 significance.


 CS  Cable Select Jumper
 -----------------------
 When two ProDrive LPS 525AT 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 at the same time. 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).

 If pin 28 is 0 (grounded), the drive is configured as a Master. If
 it is a 1 (high), the drive is configured as a Slave. In order to
 configure two drives in a Master/Slave relationship using the CS
 jumper, you need to use a cable that provides the proper signal level
 at pin 28 of the AT bus connector.


 SP  Slave Present Jumper
 ------------------------
 In combination with the current DS jumper settings, the Slave
 Present jumper implements one of two possible configuratons:

 When the drive is configured as a Master - that is, with the DS
 jumper installed - the SP jumper should be installed on the Master
 drive only if the Slave drive does not use the Drive Active/Slave
 (DASP-) signal to indicate its presence.

 When the drive is cnfigured as a Slave - that is, without the DS
 jumper installed - the SP jumper enables the self-seek test. When
 power is applied to the drive with the self-seek test enabled, the
 drive executes seeks in a butterfly pattern.

 If an error is encountered during the self-seek test, the test
 terminates.


 J3  DC Power
 ------------
 +----------------------------------------------------------------+
 |                                                        4-Pin   |
 |    40-Pin AT-Bus Interface Connector J1                DC Power|
 |   +---------------------------------------+            J3      |
 |   |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| |
 |   +---------------------------------------+  +-----+ +4-3-2-1+ |
 +----------------------------------------------------------------+

 J3 Pin 1  +12 VDC
        2  +12 VDC Return (Ground)
        3  + 5 VDC Return (Ground)
        4  + 5 VDC

 Labels indicate the pin numbers on the connector. Pins 2 and 3 are
 connected on the drive.



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QUANTUM  PRODRIVE LPS 525AT  PRODUCT MANUAL 81-103305-01, 12/92

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

 Orientation
 -----------
 The mounting holes on the ProDrive LPS 525AT 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.

 Caution: The PCB is very close to the mounting holes. Do not
 exceed the specified length for the mounting screws. The specified
 screw length allows full use of the mounting-hole threads, while
 avoiding damaging or placing unwanted stress on the PCB. To avoid
 stripping the mounting-hole threads, the maximum torque applied to
 the mounting screws must not exceed 8 inch-pounds.


 Clearance
 ---------
 Clearance from the drive - except mounting surfaces - to any surface
 must be 0.10 inches minimum.


 Ventilation
 -----------
 The LPS 525AT hard disk drives operates without a cooling fan,
 provided the ambient air temperature does not exceed 131*F (55*C).


 J3 DC Power Connector
 ---------------------
 The recommended mating connectors for the +5VDC and +12VDC input
 power are listed above.

 4-Pin Connector:      AMP P/N 1-480424-0, or equivalent
 Loose piece contacts: AMP P/N 61173-4, or equivalent
 Strip contacts:       AMP P/N 350078-4, or equivalent


 Power Sequencing
 ----------------
 You may apply the power in any order or manner, or short or open
 either the power or power return line with no loss of data or damage
 to the disk drive. However, data may be lost in the sector being
 written at the time of power loss. The drive can withstand transient
 voltages of +10% to -100% from nominal while powering up or down.


 J1 IDE-Bus Interface Connector
 ------------------------------
 On the ProDrive LPS 525AT hard disk drive, the IDE-bus
 interface cable connector (J1 section C) is a 40-pin Universal
 Header.

 To prevent the possibility of incorrect installation, has been keyed
 by removing Pin 20, which ensures that a connector cannot be
 installed upside down.

 For the mating J1 connector, recommended cable connectors include AMP
 receptacle P/N 1-499506-0, with strain relief; P/N 1-746193-0 without
 strain relief; or an equivalent. To key the cable connectors, 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


 Drive Cable and Connector
 -------------------------
 The hard disk drive connects to the host computer by means of a
 cable. This cable contains a 40-pin connector that plug into the
 drive, and a 40-pin connector that plugs into the host computer. At
 the host end, the cable plugs into either an adapter board residing
 in a host expansion slot or an on-board IDE adapter.

 If two drives are connected by a cable with two 40-pin drive
 connectors, the cable-select feature of the ProDrive LPS 525AT
 automatically configure each as drive 0 or drive 1 depending on the
 configuration of pin 28 on the connector.


  For Systems with Motherboard IDE Adapter
  ========================================
  You can install the ProDrive LPS 525AT hard disk drive in an
  AT-compatible system that contains a 40-pin AT-bus connector on the
  motherboard.

  To connect the drive to the motherboard, use a 40-pin ribbon cable.
  Ensure that pin 1 of the drive is connected to pin 1 of the mother-
  board connector.


  For Systems with an IDE Adapter Board
  =====================================
  To install a ProDrive 525AT hard disk drive in an AT-compatible
  system without a 40-pin, AT-bus connector on its motherboard, you
  need a third-party AT adapter board.


  Adapter Board Installation
  --------------------------
  Carefully read the manual that accompanies your adapter board before
  installing it. Make sure that all the jumpers are set properly and
  that there are no addressing or signal conflicts. You must also
  investigate to see if your AT-compatible system contains a
  combination floppy and hard disk controller board. If it does, you
  must disable the hard disk drive controller functions on the
  controller board before proceeding.

  Once you have disabled the hard disk drive controller functions on
  the floppy/hard drive controller, install the adapter board. Again,
  make sure that you have set all jumper straps on the adapter board
  to avoid addressing and signal conflicts.


  Connecting the Adapter Board and the Drive
  ------------------------------------------
  Use a 40-pin ribbon cable to connect the drive to the board.

  1. Insert the 40-pin cable connector into the mating connector on
     the adapter board. Make sure that pin 1 of the connector matches
     with pin 1 on the cable.

  2. Insert the other end of the cable into the header on the drive.
     When inserting this end of the cable, make sure that pin 1 of
     the cable connects to pin 1 of the drive connector.

  3. Secure the drive to the system chassis by using the mounting
     screws.


 Base Casting Assembly
 ---------------------
 A single-piece aluminium-alloy base casting provides a mounting sur-
 face for the drive mechanism and PCB. The base casting also acts as
 the flange for the DC motor assembly. To provide a contamination-free
 environment for the HDA, a gasket provides a seal between the base
 casting and the metal cover that enclose the drive mechanism. In
 addition, an E-coat seals the surface of the base casting to provide
 additional contamination protection.


 Air Filtration
 --------------
 ProDrive Series hard disk drives are Winchester-type drives. The
 heads fly very close to the media surface, at a nominal flying height
 of 4.5 microinches. Therefore, it is essential that the air
 circulating within the drive be kept free of particles. Quantum
 assembles the drive in a Class-100, purified air environment, then
 sealing the drive mechanism under a metal cover. When the drive is in
 use, the rotation of the disk forces the air inside of the drive
 through an internal filter.



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                      F   E   A   T   U   R   E  S
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QUANTUM  PRODRIVE LPS 525AT  PRODUCT MANUAL 81-103305-01 12/92

 General Description
 -------------------
 Quantum's ProDrive LPS 525AT hard disk drive is manufactured to meet
 the highest product quality standards. The ProDrive LPS 525AT hard
 disk drive uses nonremovable, 3 1/2-inch hard disks, and is available
 with either a Small Computer System interface (SCSI) or an Advanced
 Technology (AT) interface.

 The LPS 525AT nomenclature refers to the capacity - 525MB - that is
 available with this drive. The 525AT is available in the Low Profile
 Series (LPS) family of Quantum drives.

 Note: As defined by Quantum, a megabyte is 1,000,000 bytes.

 Because the drive manages media defects and error recovery
 internally, these operations are fully transparent to the user. The
 innovative design of the ProDrive LPS 525AT hard disk drive enables
 Quantum to produce a low-cost, high-reliability drive.


 Hardware Requirements
 ---------------------
 The ProDrive 525AT hard disk drive is compatible with the IBM PC AT
 and other computers that are compatible with the IBM PC AT. It
 connects to the PC either by means of a third-party adapter board, or
 by plugging a cable from the drive directly into a PC motherboard
 that supplies an Integrated Drive Electronics (IDE) interface.


 Seek Times
 ----------
   +-----------------+--------------+
   |Read-on-arrival  |   10 ms typ. |
   +-----------------+--------------+
   |Track-to-track   |  < 3 ms typ. |
   +-----------------+--------------+
   |Average write    |   11 ms typ. |
   +-----------------+--------------+
   |Full stroke      |   20 ms typ. |
   +-----------------+--------------+


 System Startup and Operation
 ----------------------------
 Once you have installed the ProDrive LPS 525AT 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.

 3. Enter the appropriate parameters.

    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.

    During the AT system CMOS setup, you must enter the drive type for
    the ProDrive LPS 525AT hard disk drive. The drive supports the
    translation of its physical drive geometry parameters such as
    cylinders, heads, and sectors per track, to a logical addressing
    mode. The drive can work with different BIOS drive-type tables of
    the various host systems.

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

 NOTE
 The drive is shipped from the factory with a low-level format. A low-
 level format is not required.


 Formatted Capacity
 ------------------
 At the factory, the ProDrive LPS 525AT 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
 3.75 MB/s maximum, 1.87 MB/s minimum. Data is transferred from the
 read buffer to the AT bus at a rate up to 5.0 MB/s, using programmed
 I/O.


 Reliability
 -----------
 Mean Time Between Failures (MTBF): 250,000 Power On Hours (POH),
                                    typical usage
 Component Life:                    5 years
 Preventive Maintenance (PM):       Not required


 Error Detection and Correction
 ------------------------------
 An error occurs whenever the drive fails to read data correctly -
 because either the read does not complete its execution, or the drive
 read data checksum is different than the recorded checksum. During a
 read operation an error can occur while a sector's header or data is
 being read. During a write operation, an error can occur while
 reading a sector's header before the data is written.


 Error Correction Code and ECC On-The-Fly
 ----------------------------------------
 The ProDrive LPS 525AT hard disk drive implements a 96-bit single
 and double burst Reed-Solomon error correction techniques. Single
 burst errors of up to to 24 bits within one sector can be corrected
 "on-the-fly", in real time as they occur, allowing a high degree of
 data integrity with no impact to the drive's performance.

 The drive does not need to re-read sector on the next disk revolu-
 tion or apply ECC for those errors that are corrected on-the-fly.
 Errors corrected in this manner are invisible to the host system. The
 drive does not report a recovered error unless it needs more than two
 disk revolutions to correct any error.

 When errors cannot be corrected on-the-fly, an automatic retry and a
 more rigorous double burts error correction algorithm enable the
 correction of any sector with two burst of three incorrect bytes
 each. In addition to this error correction capability, the drive's
 implementation of an additional cross-checking code and algorithm
 double checks the main ECC correction and greatly improves the
 probability of miscorrection.


 Automatic Actuator Lock
 -----------------------
 To ensure data integrity and prevent damage during shipment, all
 ProDrive Series hard disk drives feature a dedicated landing zone and
 Quantum's patented AIRLOCK. AIRLOCK, locks the headstack in the
 landing zone. It consists of an airvane mounted near the perimeter of
 the disk stack and a locking arm that restrains the actuator arm
 assembly when the disks are not rotating.

 When DC power is applied to the motor and the disk stack rotates, the
 rotation generates an airflow on the surface of the disk. As the flow
 of air across the airvane increases with disk ratation, the locking
 arm pivots away from the actuator arm, enabling the headstack to move
 out of the landing zone. When DC power is removed from the motor, a
 return mechanism automatically pulls the actuator into the landing
 zone, where the AIRLOCK holds it in place.


 Disk Caching
 ------------
 The ProDrive LPS 525AT hard disk drive incorporates DisCache, a 512K
 disk cache, to enhance drive performance. This integrated feature
 can significantly improve system throughput. Read and write caching
 can be enabled or disabled by using the Mode Select command.

 There are 8 64Kbyte pages in the cache. Any given page (or segment)
 holds the data from one track - thus there are a variable number of
 sectors per segment depending on which recording zone is being used.
 Two of the segments are used in a ping-pong manner, which provides 4
 2-track cache segments.


 Write Precompensation
 ---------------------
 A write precompensation circuit within the chip provides independent
 control of early and late precompensation settings, which
 accommodates the asymmetrical pulses produces by thin-film heads.


 Defect Management
 -----------------
 The ProDrive LPS 525AT allocates one sector per cylinder as a spare.
 In the factory, the media is scanned for defects. If a sector is
 found to be defective, the addrss of the sector is added to the drive
 defect list. Sectors located physically subsequent to the defective
 sector are assigned logical block addresses such that a sequential
 ordering of logical blocks results. This inline sparing technique is
 employed in an attempt to eliminate slow data transfer which would
 result from a single defective sector on a cylinder.

 If more than one sector is found defective on a cylinder, the inline
 sparing technique is applied only to the first sector. The remaining
 defective sectors are replaced with the nearest available spare
 sectors on nearby cylinders. Such an assignment of additional re-
 placement sectors from nearby sectors rather than having a central
 pool of spare sectors is an attempt to minimize the motion of the
 actuator and head which would be otherwise needed to find a replace-
 ment sector. The result in minimal reduction of data throughput.

 Defects that occur in the field are known as grown defects. Inline
 sparing is not performed on these grown defects.

 Sectors are considered to contain grown defects if the double burst
 ECC algorithm must be applied in order to recover the data. If this
 algorithm is successful, the corrected data is stored in the newly
 allocated sector. If the algorithm is not successful, the erroneous
 data is stored in the new sector, and a flag is set in the data ID
 field which causes the drive to report an ECC error each time the
 sector is read. This condition remains until the sector is
 re-written.


 Track and Cylinder Skewing for ProDrive LPS 525AT
 -------------------------------------------------
    +-------+---------+------+---------+
    | Zone  |Sectors  |Track | Cylinder|
    | Number|Per Track|Skew  | Skew    |
    |       |         |(Sec.)| (Sec.)  |
    +-------+---------+------+---------+
    |  15   |   42    |  09  |   12    |
    +-------+---------+------+---------+
    |  14   |   48    |  10  |   13    |
    +-------+---------+------+---------+
    |  13   |   51    |  11  |   14    |
    +-------+---------+------+---------+
    |  12   |   56    |  12  |   15    |
    +-------+---------+------+---------+
    |  11   |   64    |  13  |   17    |
    +-------+---------+------+---------+
    |  10   |   64    |  13  |   17    |
    +-------+---------+------+---------+
    |  09   |   67    |  14  |   18    |
    +-------+---------+------+---------+
    |  08   |   70    |  15  |   19    |
    +-------+---------+------+---------+
    |  07   |   73    |  15  |   20    |
    +-------+---------+------+---------+
    |  06   |   75    |  16  |   20    |
    +-------+---------+------+---------+
    |  05   |   80    |  17  |   22    |
    +-------+---------+------+---------+
    |  04   |   80    |  17  |   22    |
    +-------+---------+------+---------+
    |  03   |   85    |  18  |   23    |
    +-------+---------+------+---------+
    |  02   |   86    |  18  |   23    |
    +-------+---------+------+---------+
    |  01   |   89    |  19  |   24    |
    +-------+---------+------+---------+
    |  00   |   92    |  19  |   25    |
    +-------+---------+------+---------+


