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Hard Drive: MAXTOR: 72004A (11/03/96) 2004MB 3.5"/SL ATA2 FAST

7 2 0 0 4 A   ( 1 1 / 0 3 / 9 6 )    MAXTOR
                                                      Native|  Translation
Form                 3.5"/SLIMLINE         Cylinders    4702| 3893|     |
Capacity form/unform  2004/      MB        Heads           6|   16|     |
Seek time   / track  12.0/ 2.0 ms          Sector/track     |   63|     |
Controller           IDE / ATA2 FAST/ENHA  Precompensation
Cache/Buffer            64 KB SEGMENTED    Landing Zone
Data transfer rate          MB/S int       Bytes/Sector      512
                     16.600 MB/S ext PIO4
Recording method     RLL 1/7                        operating  | non-operating
Supply voltage     5/12 V       Temperature *C         5 55    |    -40 71
Power: sleep          1.0 W     Humidity     %         5 95    |      5 95
       standby        1.3 W     Altitude    km    -0.061  3.048|
       idle           4.4 W     Shock        g        34       |    100
       seek           7.0 W     Rotation   RPM      4480
       read/write     5.0 W     Acoustic   dBA        38
       spin-up        9.7 W     ECC        Bit   ON THE FLY
                                MTBF         h     300000
                                Warranty Month
Lift/Lock/Park     YES          Certificates     CE,CSA,EPA GREEN PC,FCC,TU...


MAXTOR 72004/71670/71336/7668-A/AP REFERENCE MANUAL #1333 REV.C '96

  |                                          J20*****J24    |
  |         COMPONENT SIDE                      *****       |XXI
  |                                                         |XXN
  |                                                         |XXT
  |                                                         |XXE
  |                                                         |XXR
  |                                                         |XXF J1
  |                                                         |XXA
  |                                                         |XXC
  |                                                         |XXE
  |                                                         |XX
  |                                                         |XX
  |                                                         |XX
  |                                                         |  1
  |                                                         1XX Power
  |                                                         |XX J2


MAXTOR 72004/71670/71336/7668-A/AP REFERENCE MANUAL #1333 REV.C '96

Jumper Setting

 Jumper Designation
     +---------------- J20 Master/Slave
     |  +------------- J21 FACTORY RESERVED!
     |  |  +---------- J22 FACTORY RESERVED!
     *  *  *  *  *
     *  *  *  *  *
              |  |
              |  +---- J24 Cable Select
              +------- J23 Write Cache

 J20 Master/Slave
 J20 CLOSED  Only drive in single drive system (default)
     CLOSED  Master drive in dual drive system
     OPEN    Slave drive in dual drive system

 J23 Write Cache
 J23 OPEN   Write Cache enabled (default)
     CLOSED Write Cache disabled

 J24 Cable Select
 J24 OPEN   Cable Select disable (default)
     CLOSED Cable Select enabled

Jumpers J21 and J22 are factory reserved.

A spare shunt is shipped between J23 and J24.

 DC Power connector
  pin 1    +12 VDC
  pin 2    +12 Volts Return
  pin 3    + 5 Volts Return
  pin 4    + 5 VDC


MAXTOR 72004/71670/71336/7668-A/AP REFERENCE MANUAL #1333 REV.C '96

Notes of Installation

Installation direction

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

The drive will operate in all axis (6 directions).

Recommended Mounting Configuration
Maxtor 7000 Series drive design allows greater shock tolerance than
that afforded by larger, heavier drives. The drive may be mounted in
any attitude using four size 6-32 screws with 1/8" maximum
penetration and a maximum torque of 5-inch pounds.

Allow adequate ventilation to the drive to ensure reliable drive

Air Filtration System
All 7000 Series drives are designed to operate in a typical
office environment with minimal environmental control. Over the life
of the drive, a 0.3 micron filter and breather filter (located within
the HDA) maintain a clean environment to the heads and disks.

Read/Write Electronics
An integrated circuit mounted within the sealed enclosure (near the
read/write heads) provides one of four head selection (depending on
the model), read preamplification, and write drive circuitry.

Read/Write Heads and Disks
Low mass, low force read/write heads record data on two 3.5"
diameter disks. Maxtor uses a sputtered thin film medium on all
disks for 7000 Series drives.

Drive Mechanism
A brushless DC direct-drive motor rotates the spindle at 4,480 RPM
( 0.1%). The dynamically balanced motor/spindle assembly ensures
minimal mechanical runout to the disks. A dynamic brake provides a
fast stop to the spindle motor upon power removal. The speed
tolerance includes motor performance and motor circuit tolerances.

Voice Coil Actuator
All 7000 Series drives employ a rotary voice coil actuator which
consists of a moving coil, an E-block or actuator arm assembly, and
stationary magnets. The actuator moves on a low-mass, low-friction
center shaft. The low friction generated contributes to fast average
access time and low power consumption.

Automatic Headpark and Lock Operation
Immediately following power-down, dynamic braking of the spinning
disks delays momentarily and lets the heads move to an inner
mechanical stop. A small fixed magnet holds the heads in place as the
disk spin down. The heads are released only when power is again

Dual Drive Support
Two drives may be accessed via a common interface cable, using the
same range of I/O addresses. The drives are jumpered as drive 0 or 1,
and are selected by the drive select bit in the Drive/Head register
of the task file.

All Task File registers are written in parallel to both drives. The
interface processor on each drive decides whether a command written
to it should be executed; this depends on the type of command and
which drive is selected. Only the drive selected executes the command
and activates the data bus in response to host I/O reads; the drive
not selected remains inactive.

A master/slave relationship exists between the two drives: drive 0 is
the master, and drive 1, the slave. When J20 is closed (factory
default), the drive assumes the role of master; when open, the drive
acts as a slave. In single drive configurations, J20 must be closed.

Cable Select
CSEL (cable select) is an optional feature per ATA CAM specification.
Drives configured in a multiple drive system are identified by CSEL's

- If CSEL is grounded, then the drive address is 0.
- If CSEL is open, then the drive address is 1.

If the Cable Select jumper (J24) is installed, the Master/Slave
jumper (J20) will be ignored.

Sector Address Translation
All 7000 Series drives feature a Universal Translate Mode. In an
AT-class system, the drive may be configured to any specified
combination of cylinders, heads, and sectors (within the range of the
drive's formatted capacity).

These drives powers-up in the Translate Mode:

Model Cylinders Heads Sectors
72004A/AP 3,893 16 63
71670A/AP 3,244 16 63
71336A/AP 2,595 16 63
7668A/AP 1,297 16 63

Interface Connector
All 7000 Series AT drives have a 40-pin interface connector mounted
on the PCBA. The drive may connect directly to the host; or it can
also accommodate a cable connection (maximum cable length: 18

(Striped Edge = Pin 1)

Buffer Segmentation
The data buffer is organized into three segments: the read buffer,
the write buffer, and an micro controller scratch pad. The read
segment occupies half of the buffer and operates as a circular read-
ahead buffer. The write segment occupies the other half. During write
operations, it contains the host write data. Commands ATA Read Buffer
(E4) and ATA Write Buffer (E8) are implemented per CAM specification

Read-Ahead Mode
Normally, this mode is active. Following a read request, disk read-
ahead begins on the first sector and continues sequentially until the
buffer is full. If a read request is received during the read-ahead
operation, the buffer is examined to determine if the request is in
the cache. If a cache hit occurs, read-ahead mode continues without
interruption and the host transfer begins immediately.


MAXTOR 72004/71670/71336/7668-A/AP REFERENCE MANUAL #1333 REV.C '96

Maxtor 7000 Series AT disk drives are 1" high, 3.5" random access
storage devices which incorporate an on-board AT controller. Maxtor
engineers have applied recent advances in hard drive technology to
the design and manufacture of these drives. High data transfer rates
and fast access times make them especially well-suited to desktop and
workstation applications.

Defect Management Zone (DMZ)
Each drive model has a fixed number of spare sectors per DMZ:
72004A/AP = 6,
71670A/AP = 5,
71336A/AP = 4 and
7668A/AP = 2
all of which are located at the end of each DMZ. Upon detection of a
bad sector that has been reassigned, the next sequential sector is

The first spare sector makes up for the loss of sector 3, and so
maintains the sequential order of data, with 3 spare sectors still
allocated for that cylinder. This push down method assures maximum

In the rare occurrence that the number of reassigned bad sectors
exceed the number of spare sectors allocated for that cylinder, an
alternate track area of the disk is used. All models have five (5)
alternate tracks per surface.

Error Correction Code
On-the-fly Hardware ECC
41 bits, single burst, guaranteed
17 bits, double burst, guaranteed

Software ECC Correction
113 bits, single burst, guaranteed
17 bits, five burst, guaranteed

Zone Density Recording
The disk capacity is increased with bit density management - common
with Zone Density Recording. Each disk surface is divided into 10
circumferential zones. All tracks within a given zone contain a
constant number of data sectors. The number of data sectors per track
varies in different zones; the outermost zone contains the largest
number of data sectors, and the innermost contains the fewest.

Execute Drive Diagnostics
Commands the drive to implements the internal diagnostics tests.
(These tests are executed only upon command receipt; they do not run
automatically at power up or after a reset.)

The drive sets BSY immediately upon receiving this command.

This table presents the codes and their descriptions:

Note that the value in the Error register should be viewed as a
unique 8 bit Code.

  |Error Code | Description                      |
  |    01     | no error detected                |
  |    02     | formatter device error           |
  |    03     | sector buffer error              |
  |    04     | ECC circuitry error              |
  |    05     | controller microprocessor error  |
  |    8x     | slave drive failed (Note)        |
                Note: If a slave drive fails diagnostics, the master
                drive OR's 80 hex with its own status, and loads that
                code into the Error register.

                If a slave drive passes diagnostics (or a slave is
                absent), the master drive OR's 00 with its own status
                and loads that code into the Error register.

EISA Type "B" and Type "F" DMA Modes
Direct Memory Access (DMA) transfers improves system performance by
significantly improving troughtput.

Physical Configuration Sectors per track
Zone 1 = 162 Zone 2 = 156 Zone 3 = 150
Zone 4 = 140 Zone 5 = 132 Zone 6 = 126
Zone 7 = 120 Zone 8 = 108 Zone 9 = 100
Zone 10 = 94

Data transfer rate (MBytes per second)
To from media

Zone 01 = 8.10 Zone 06 = 6.31
Zone 02 = 7.79 Zone 07 = 5.86
Zone 03 = 7.46 Zone 08 = 5.41
Zone 04 = 6.99 Zone 09 = 5.00
Zone 05 = 6.61 Zone 10 = 4.74

Logical Block Addressing
The Logical Block Address (LBA) mode can only be utilized into
systems that support this form of translation. The cylinder, head and
sector geometry of the drive, as presented to the host, differs from
actual physical geometry.

The host AT computer may access a drive of set parameters: number of
cylinders, heads, and sectors per track, plus cylinder, head and
sector addresses. However, the drive can't use these host parameters
directly because of zoned recording techniques. The drive translates
the host parameters to a set of logical internal addresses for data

The host drive geometry parameters are mapped into an LBA based on
this formula:

        = (HSCA-1)+HSPTx(HHDA+HNHDxHCYA)     (2)

 where  HSCA = Host Sector Address, HHDA = Host Head Address
        HCYA = Host Cylinder Address, HNHD = Host Number of Heads
        HSPT = Host Sectors per Track

The LBA is checked for violating the drive capacity. If it does not,
the LBA is converted to physical drive cylinder, head and sector
values. The physical address is then used to access the data stored
on the disk and other drive related operations.

S.M.A.R.T. Command Set
The Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T.)
command has been implemented to improve the data integrity and data
availability of hard disk drives. In some cases, a S.M.A.R.T.
capable device will predict an impending failure with sufficient time
to allow users to backup their data and replace the drive before data
loss of service.

The S.M.A.R.T. sub-command comprise the ATA S.M.A.R.T. feature set
that provide access to S.M.A.R.T. attribute values, attribute
thresholds and other logging and reporting information.

Prior to writing any S.M.A.R.T. command to the device's command
register, key values must be written by the host into the device's
cylinder low and cylinder high registers, or the command will be
aborted. For any S.M.A.R.T. sub-command, if a device register is not
specified as being written with a value by the host, then the value
in that register is undefined and should be ignored by the device.
the values are:

   4Fh    Cylinder Low  (1F4h)
   C2hH   Cylinder High (1F5h)

The S.M.A.R.T. sub-commands use a single command code (BOh) and are
differentiated from one another by the value placed in the feature
register. In order to issue a command, the host must write the sub-
command-specific code to the device's features register before
writung the command code to the command register. The sub-command
and their respective codes are:

D8h Enable S.M.A.R.T

D9h Disable S.M.A.R.T

 DAh S.M.A.R.T. Return Status
     This feature allows the host to access the status of a
     S.M.A.R.T. capable device by comparing all saved attribute
     values with their corresponding warranty failure thresholds. If
     no thresholds are exceeded, the drive is declared to have a
     positive health status. Executing this sub-comman results in all
     attribute values being saved to non-volatile storage on the

 DOh S.M.A.R.T. Read Attribute Value
     This feature returns 512 bytes of attribute information to the

 D1h S.M.A.R.T. Read Attribute Thresholds
     This feature returns 512 bytes of warranty failure thresholds
     to the host.

 D3h S.M.A.R.T. Save Attribute Value
     This feature saves the current attribute values to non-volatile

 D2h Enable/Disable Autosave
     To enable this feature, set the sector count register to F1h
     (enable) or 0 (disable). Attribute values are automatically
     saved to non-volatile storage on the device after five minutes
     of idle time and before entering idle, sleep or standby modes.
     This feature is defaulted to "enabled" when S.M.A.R.T. is
     enabled wia the S.M.A.R.T. Enable Operations commands. The
     autosave feature will not impact host system performance and
     does not need to be disabled.

The following attributes are available:

   ID    Status Flag   Definition
    1    OBh           Read Error Rate
    3    27h           Spin Time
    4    32h           Total Spinups
    5    33h           Reallocated Sectors
    7    OBh           Seek Error Rate
    9    12h           Power-On Hours
    A    27h           Spin-up Retries
    C    32h           Total Power-ups

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