
S T 3 6 5 5 A           M E D A L I S T    SEAGATE
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 3.5"/SLIMLINE         Cylinders        | 1024|     |
Capacity form/unform   528/      MB        Heads           5|   16|     |
Seek time   / track  12.0/ 3.5 ms          Sector/track     |   63|     |
Controller           IDE / ATA2 FAST/ENHA  Precompensation
Cache/Buffer           256 KB SEGMENTED    Landing Zone
Data transfer rate    3.000 MB/S int       Bytes/Sector      512
                     11.100 MB/S ext
Recording method     RLL 1/7                        operating  | non-operating
                                                  -------------+--------------
Supply voltage     5/12 V       Temperature *C         5 55    |    -40 70
Power: sleep              W     Humidity     %         8 80    |      5 95
       standby        0.9 W     Altitude    km    -0.305  3.048| -0.305 12.192
       idle           3.2 W     Shock        g         2       |     75
       seek           5.6 W     Rotation   RPM      4500
       read/write     5.4 W     Acoustic   dBA        36
       spin-up        7.0 W     ECC        Bit
                                MTBF         h     250000
                                Warranty Month        24
Lift/Lock/Park     YES          Certificates     CSA,FCC,IEC950,UL1950,UL47...


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SEAGATE  ST3390A/3655A  PRODUCT MANUAL 36212-001, REV. A

  +---------------------------------------------------------++-1 J5
  |                                                         |+-+
  |                                                         |XX J7
  |                                                         |xx
  |                                                         |XX
  |                                                         |XX
  |                                                         |XX
  |                                                         |XX
  |                                                         |XX
  |                                                         |XX J1
  |                                                         |XX I/O
  |                                                         |XX
  |+-+J8                                                    |XX
  ||x|                                                      |1X
  ||x|                                                      |
  ||x|                                             +--+J6   |XX Power
  |+-1                                             +--+     |XX J3
  +---------------------------------------------------------+  1



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                      J   U   M   P   E   R   S
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SEAGATE  ST3390A/3655A  PRODUCT MANUAL 36212-001, REV. A

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


 J5  Master/Slave and Slave Present Jumper Block
 ------------------------------------------------

 +3--1+ One Drive Only  +3--1+ Drive is   +3--1+ Drive is
 |o  o| (Default)       |o  X| is Slave   |X  o| Master with
 |o  o|                 |o  X|            |X  o| Slave Present
 +4--2+                 +4--2+            +4--2+

 If only one drive is installed, do not install any jumpers on the
 master/slave and slave present jumper block.

 If there are two drives installed on the bus, one must be configured
 as a master and the other as a slave. No more than two drives can be
 connected on the AT bus.

 To configure the drive with a slave present, install a jumper on pins
 3 and 4 only of the master/slave and slave present jumper block.

 If both the master and the slave are ST3390A or ST3655A drives, you
 do not need to install a jumper on pins 3 and 4. This is because the
 master can detect the presence of the slave using the DASP- signal.
 If the drives in your application do not implement the DASP- signal,
 install the jumper on the master drive only.

 To configure the drive as a slave, install a jumper on pins 1 and 2
 only of the master/slave and slave present jumper block.



 J8  Options Jumper Block
 -------------------------

       13 11  9  7  5  3  1
   ---+---------------------+---Circuit-board
      | o  o  o  o  o     o |
      | o  o  o  o  o  o  o |
      +---------------------+
       14 12 10  8  6  4  2


  Pin     Function
  -------------------------------------
   3      Removed for Key
   8      Spindle clock to I/O pin 28
   9      Clock Ground
  10      External Spindle Clock Sync.
  13      Remote LED-
  14      Remote LED+

 Note: All other pins are RESERVED! Do NOT use them.


 Spindle synchronization
 -----------------------
 The spindle clock signal (SPSYNC-) synchronizes the rotation of up to
 12 drives in a system. When two or more drives are connected to the
 host, the drives automatically configure themselves in either of two
 ways:

  - The spindle synchronization clock signal is generated by the host.
    The drives configure themselves as slaves and synchronize their
    spindles according to the host signal.

  - The spindle synchronization clock signal is generated by one of
    the drives. The master configures itself as the originator of the
    SPSYNC- signal; the other drives become slaves, or receivers of
    the SPSYNC- signal.

 The slave receives the signal to synchronize its spindle with the
 host or master and synchronizes its index with the SPSYNC- signal.
 Synchronization is achieved, and is indicated by the drive setting
 the DRDY bit in the Status register. (If a drive that was already
 synchronized loses synchronization, but continues to function, it
 does not clear DRDY.)

 There are three ways to enable spindle synchronization:

  - Enable pin 28 (SPSYNC-) of the AT interface connector by install-
    ing a jumper on pins 8 and 10 of the options jumper block (J8).

  - Connect a twisted pair to pins 9 and 10 of the options jumper
    block to transmit and receive SPSYNC-.

    Use one strand of the twisted pair to connect pin 9 of the options
    jumper block of each drive. Use the other strand to connect pin 10
    of the options jumper block of each drive. The cable should not be
    longer than six feet (1.8 meters).

 The spindle clock uses a single-ended TTL, active low, 75 Hz signal
 with a clock period of 13.34 msec.   0.5% and a duty cycle of 0.5
  sec minimum, 500  sec maximum. The spindle clock is leading edge to
 index leading edge 0   250  sec.

                        +-------------------+
                        |J8+-10+  Drive     |
                        +--+-9++------------+
                             ||
    +--------------------+   ||
    |J8+10-+     Drive   |   ||
    +--++9-+-------------+   ||
        |+-------------------+|
        +---------------------+



 J8 Remote LED connection
 ------------------------
 If you want to add a remote LED, attach a two-pin, 0.1-inch connector
 to Pins 13 and 14 of the options jumper block.



 J3  DC Power and Pin Connector Assignment
 -----------------------------------------

    --+------------+--
      | 1  2  3  4 |
      +-+--+--+--+-+
        |  |  |  +----- + 5 VDC
        |  |  +-------- + 5 Volts Return
        |  +----------- +12 Volts Return
        +-------------- +12 VDC



 J7  Mini Power Connector
 ------------------------
    --+-------+--
      | o o o |
      +-+-+-+-+
        | | +---- + 5 VDC
        | +------ +12 VDC
        +-------- +GND


 J6 Factory Test
 ---------------
 J6 for factory test!
 The pins on this jumper block are used for testing during the manu-
 facturing process; they are not for field use.


 CAUTION
 When installing jumpers on the options jumper block, be carefuk to
 install jumpers on the correct pins. If you install jumpers on the
 wrong pins, you could damage the drive.



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SEAGATE  ST3390A/3655A  PRODUCT MANUAL 36212-001, REV. A

 Drive Orientation
 =================

 You can mount the drive in any orientation. Follow the guidelines
 below appropriate to the set of mounting holes you select to use:
 either bottom mounting holes or side mounting holes.

 Regardless of which set of holes you use, use only three mounting
 screws.

 NOTE
 For optimum performance, format the drive in the same orientation as
 you mount it in the host system.


 Bottom mounting holes
 ---------------------
 Use 6-32 UNS screws in three of the four available bottom mounting
 holes.

 Do not insert the bottom mounting screws more than 0.20 inches (6
 turns) into the drive frame. If you use a screw that is too long, you
 could damage the drive.


 Side mounting holes
 -------------------
 Use three 6-32 UNS screws in three of the six available side mounting
 holes according to the following guidelines:

   - Do not use all three mounting holes on the same side of the
     drive.

   - Use one or both of the following: the side mounting hole near
     the power connector or the side mounting hole (on the other
     side of the drive) near the I/O connector.

   - Use at least one, but no more than two, of the other four side
     mounting holes.

 CAUTION
 Do not insert side mounting screws more than 0.13 inches (4 turns)
 into the drive frame. If you use a screw that is too long, you cold
 damage the drive.


 I/O cable and connector
 -----------------------
 The I/O connector is a 40-pin connector. The even pins are next to
 the edge of the printed circuit board; the odd pins are away from the
 printed circuit board. Pin 1 is near the 4-pin power connector.

 There is no pin 20 because that location is used as a key. The corre-
 sponding pin hole on the cable connector should be plugged to prevent
 the connector from being installed upside down. The I/O cable cannot
 be any longer than 18 inches (0.46 meters).

 The table below lists recommended parts for the mating connector.
 You can use equivalent parts.


  Part        Description      3M part number
  Connector   40-pin           3M-3417-7000
  Connector   40-pin           3M-3448-2040
  Flat cable  AWG28 (stranded) 3M-3365-40


 AT interface
 ------------
 These drives are compatible with the requirements of the IBM AT bus.
 The AT interface consists of single-ended, TTL-compatible receivers
 and drivers communinating through a 40-conductor flat-ribbon, non-
 shielded cable with a maximum length of 18 inches (0.45 meters) using
 an asynchronous interface protocol. The drivers can sink up to 24 mA
 and drive a load uo to 300 pF.


 Jumpers
 -------
 The drive can be daisy-chained with a second drive if the second
 drive meets the same interface specifications. In this configuration,
 one drive is designated as the master and the other as the slave.


 Jumper sizes
 ------------
 The drive uses 0.1-inch configuration jumpers. Using connectors and
 jumpers other than those specifically made for 0.1-inch applications
 damages the connectors and jumpers.

 Use Seagate part number 10562-001, or an equivalent.


 Power connector
 ---------------
 The drive has two power connectors: a standard 4-pin power connector
 and 3-pin mini power connector. You can connect the 3-pin power
 connector to a Molex mating connector. The part number for the Molex
 housing is 39-01-0033 and the part number for the Molex contact is
 30-00-0023.



 Multisegment read look-ahead buffer
 -----------------------------------
 The drive uses the read look-ahead buffer to improve performance by
 eliminating access times under certain conditions. The read look-
 ahead buufer contains four 64K-segments of RAM (one for writing and
 three for reading) for a total capacity of 256 Kbytes.

 The read segments are used to store the next logical sectors after
 the previously read sector into a buffer before those sectors are
 actually requested by the host. The read look-ahead buffer stores
 data from the start of a read until the buffer segment is full, or
 until another command is received from the host.

 The write segment is used for write immediate and write merging.


 Auto-park
 ---------
 Upon power-down, the read/write heads automatically move to the
 shipping zone. The heads park inside the maximum data cylinder. When
 power is applied, the heads recalibrate to track 0.

 CAUTION
 Do not move the drive until the motor has come to a complete stop.


 Power management
 ----------------
 The drive implements intelligent power managment by automatically
 changing power modes based on interface activity. Power management
 reduces the average power consumption considerably compared to a
 drive without this feature.

 Interface commands and interface-selectable parameters allow you to
 customize the power management configuration. Transitions between the
 Standby mode and the Idle mode (through the Spinup mode) are
 controlled by both the power management configuration and the inter-
 face demands. Transitions between the Idle mode, the Read/Write mode
 and the Seeking mode are controlled solely by interface requests
 (seeks, reads and writes).

 NOTE
 If you install the ST3390A or the ST3655A as a slave with a master
 drive that does not support power management (for example, a Seagate
 ST1239A drive), do not use power management commands on the ST3390A
 or the ST3655A.

 To enable power management, use the system setup utility.



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                      F   E   A   T   U   R   E  S
**********************************************************************
SEAGATE  ST3390A/3655A  PRODUCT MANUAL 36212-001, REV. A

 Low-level formatting
 -------------------
 ST3390A and ST3655A family drives are low-level formatted at the
 factory to 512 bytes per sector. You cannot low level format them.


 Seek Time
 ---------
       +-------------------------------------------+
       |Seagate ST3390A and ST3655A                |
       +----------------------------------+--------+
       |Track-to-Track         msec. typ. |   3.5  |
       |Track-to-Track         msec. max. |   4    |
       +----------------------------------+--------+
       |Average                msec. typ. |  12    |
       |Average                msec. max. |  14    |
       +----------------------------------+--------+
       |Full-stroke seek       msec. typ. |  30    |
       |Full-stroke seek       msec. max. |  32    |
       +----------------------------------+--------+
       |Latency                msec. avg. |   6.67 |
       +----------------------------------+--------+


 Reliability
 -----------
 Read error rates are measured with automatic retries and data
 correction with ECC enabled and all flaws re-allocated. MTBF is
 measured at nominal power at sea level and an ambient temperature of
 40*C.

 Nonrecoverable read errors         1 per 10(13) bits transferred

 Seek errors                        1 per 10(7) physical seeks

 MTBF                               250,000 power on hours

 Service life                       5 years


