
S T 5 6 6 0 A    SEAGATE
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 3.5"/SUPERSLIMLINE    Cylinders    3420| 1057| 1024|
Capacity form/unform   545/      MB        Heads           4|   16|   16|
Seek time   / track  13.0/ 3.5 ms          Sector/track     |   63|   63|
Controller           IDE / ATA2 FAST/ENHA  Precompensation
Cache/Buffer           256 KB MULTI-SEGMEN Landing Zone
Data transfer rate    4.000 MB/S int       Bytes/Sector      512
                     13.300 MB/S ext DMA
Recording method     RLL 1/7                        operating  | non-operating
                                                  -------------+--------------
Supply voltage     5/12 V       Temperature *C         5 55    |    -40 70
Power: sleep              W     Humidity     %                 |
       standby        0.7 W     Altitude    km                 |
       idle           2.5 W     Shock        g         2       |     75
       seek           5.0 W     Rotation   RPM      4500
       read/write     5.5 W     Acoustic   dBA        27
       spin-up            W     ECC        Bit
                                MTBF         h     300000
                                Warranty Month        24
Lift/Lock/Park     YES          Certificates     CSA,FCC,IEC950,UL1950,UL47...


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                        L   A   Y   O   U   T
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SEAGATE  ST5660A  PRODUCT MANUAL 36242-001, REV. A, 3/1994

  +---------------------------------------------------------+
  |                                                         |XX I
  |                                                         |XX N
  |                                                         |XX T
  |                                                         |XX E
  |                                                         |XX R
  |                                                         |XX F
  |                                                         |XX A
  |                                                         |XX C
  |                                                         |XX E
  +--33                                                     |XX
  |  |Options                                               |XX  J1
  |  |Jumper                                                |XX
  |  |Block                                                 |XX1
  |  | J8                                                   |
  |  |                                                      |XX J3
  +--1                                                      |XX Power
  +---------------------------------------------------------+   1



**********************************************************************
                      J   U   M   P   E   R   S
**********************************************************************
SEAGATE  ST5660A  PRODUCT MANUAL 36242-001, REV. A, MARCH 1994

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


       Options Jumper Block
   +33--------23--+--17-----+9+7-5+3-1+
 --+ o o o o o o o|o o|o o o|o|o o|o *+----Circuit--
   | o o o o o o o|o o|o   o|o|o o|o o|    Board
   +34--------+---+---+-----+-+---+--2+----------------------------+
              |X X|o o|X o o|o|o o|o o|Spares                      |
              |X X|o o|X   o|o|o o|o o|                            |
              +---+---+-----+-+---+---+----------------------------+
                            | |o o|o o| One drive only             |
                            | |o o|o o|                            |
 NOTE                       | |   |   |                            |
 ALL OTHER PINS             | |o o|X o| Drive is master;           |
 ARE RESERVED.              | |o o|X o| Slave present              |
 DO NOT USE THEM.           | |   |   |                            |
                            | |o o|o X| Drive is Slave             |
                            | |o o|o X|                            |
                            +-+---+---+----------------------------+
                            |o|o X|X X| Cable Select               |
                            |o|o X|X X|                            |
                            +-+---+---+----------------------------+
                            | |xxx|   | RESERVED                   |
                            | |o o|   |                            |
                            +-+---+---+----------------------------+
                            |o|X o|   | RESERVED                   |
                            |o|X o|   |                            |
                            +-+---+---+----------------------------+
                            |X|   |   | Remote LED connection      |
                            |X|   |   |                            |
                            +-+---+---+----------------------------+



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                      I   N   S   T   A   L   L
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SEAGATE  ST5660A  PRODUCT MANUAL 36242-001, REV. A, MARCH 1994

 Notes On Installation
 =====================


 Mounting the drive
 ------------------
 Mount the drive securely in the computer using either the bottom or
 side mounting holes, as described below. Position the drive so that
 you do not strain or crimp the cables.


 Bottom mounting holes
 ---------------------
 Insert 6-32 UNC-2A mounting screws in the four available bottom
 mounting holes. Do not insert the screws more than 0.20 inches (6
 turns) into the drive frame.


 Side mounting holes
 -------------------
 Insert 6-32 UNC-2A mounting screws in four of the six available side
 mounting holes. Use two mounting holes on each side of the drive. Do
 not insert the screws more than 0.20 inches (6 turns) into the drive
 frame.

 CAUTION
 To avoid damaging the drive:

 - Use mounting screws of the correct size and length.

 - Gently tighten the mounting screws_do not apply more than 6 inch-
   pounds of torque.


 Auto-park
 ---------
 Upon power-down, the 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.


 DC Power
 --------
 Except during the write procedure, you can turn off and turn on power
 to the drive in any sequence without losing data or damaging the
 drive. If you turn off the power during a write procedure, you may
 lose the data currently being written.


 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. Make sure
 the corresponding pin hole on the cable connector is plugged to
 prevent the connector from being installed upside down. The I/O cable
 cannot be 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
 ------------
 The drive complies with all ATA interface specifications. The
 interface consists of single-ended, TTL-compatible receivers and
 drivers communicating through a 40-conductor flat ribbon, nonshielded
 cable with a maximum length of 18 inches (0.46 meters) using an
 asynchronous interface protocol. The drivers can sink up to 24 mA and
 drive a load up to 300 pF.


 Attaching cables
 ----------------
 - Make sure the computer is off.

 - Put on a grounded wrist strap.

 - Connect the remote LED (optional). If you want to connect the
   drive-activity indicating LED of your computer front panel to the
   drive, attach the two-wire LED connector cable from the case to
   pins 9(-) and 10(+) of jumper block J8.

 - Attach the power cable. Connect a system power cable to the 4-pin
   power connector.

 - Attach the interface cable. Note that the cable length must be 18
   inches or less.

 CAUTION
 Connector midalignment can damage the computer and the drive.

 One-drive system using standard ATA 40-pin interface cable: Connect
 one end of the cable to the computer's host adapter card or the hard
 drive connector located on the motherboard, and the other end to
 interface connector J1 on the drive. Align pin 1 on each cable
 connector with pin 1 on its matching equipment connector.

 Two-drive system with standard ATA 40-pin interface cable: If you are
 using a standard 40-pin two-drive ribbon cable, plug one connector
 into J1 on each drive and attach the remaining connector to the host
 adapter. Two-drive system using cable select: Use of this method
 requires drives supporting the cable select option and also requires
 a special daisy-chain interface cable built for cable-select; this
 cable is not the same as a standard 40 pin hard drive cable. To make
 a drive the master, attach it to the connector that has the CSEL
 signal line connected to pin 28. To make a drive the slave, attach it
 to the connector that has pin 28 unconnected. Finally, connect the
 cable to the host adapter.

 Note that CSEL is grounded on the host adapter.



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                      F   E   A   T   U   R   E  S
**********************************************************************
SEAGATE  ST5660A  PRODUCT MANUAL 36242-001, REV. A, MARCH 1994

 Formatted Capacity
 ------------------
 The drive was low-level formatted at the factory, you cannot low-
 level format it.

 You can operate the drive using many different logical configura-
 tions, provided the number of sectors per track does not exceed 63.
 Three possible configurations are shown below. The first two
 configurations represent conventional CHS addressing as used on most
 DOS computers. The third configuration uses LBA addressing.

                                  |    CHS    |   CHS*    |   LBA**
 ---------------------------------+-----------+-----------+----------
 Cylinders                        | 1,024     | 1,057     |   N/A
 Heads                            |    16     |    16     |   N/A
 Sectors                          |    63     |    63     |   N/A
 Total sectors                    | 1,032,192 | 1,065,456 | 1,066,184
 Formatted capacity (Mbytes***)   |   528.48  |   545.3   |   545.8

 * This is the default configuration. This configuration can only
   be used in computers that are capable of addressing more than
   1,024 cylinders. Therefore, if your computer cannot address more
   than 1,024 cylinders, you must change the configuration using the
   setup utility.

 ** This configuration can only be used in computers that support LBA
    addressing.

 *** One megabyte equals one million bytes.

 The drive was configured in translation mode at the factory. You can
 verify the number of cylinders, sectors per track and heads and the
 total number of LBA sectors by using the Identify Drive (ECH)
 command.


 Multisegmented cache buffer
 ---------------------------
 The drive uses the 256-Kbyte, multisegmented cache buffer to improve
 performance by eliminating access times under certain conditions.

 Read look-ahead
 The drive uses the read segments to store additional logical sectors,
 after the last requested sector, into a buffer before the additional
 sectors are requested by the computer. The cache buffer stores data
 from the start of a read until the buffer segment is full, or until
 another command is received from the computer.

 Write immediate
 The drive uses the write segment to store write commands and data.
 After the drive receives all the data for the com-mand, it issues a
 write complete. Then, the drive writes the data to the disc.

 Write merging
 The drive accepts contiguous write commands and executes them as one
 command.

 Write caching
 The last data written by the drive is retained in the buffer for use
 by future reads.


 Power management
 ----------------
 This drive provides and uses power-management modes which reduce
 power consumption. The level of drive activity for each power-
 management mode is described below.

 You can customize the power-management modes using the AT interface
 commands that control the power modes. These commands are described
 in the Seagate ATA Interface Reference Manual, publication number
 36111- xxx.

 NOTE
 If you install the ST5660A as a slave with a master drive that does
 not support power management (for example, a Seagate ST1239A drive),
 do not send power-management commands to the ST5660A.


 Power-management modes
 ----------------------
 The drive supports the following power-management modes:

 - Spinup
   The drive brings the spindle and discs up to operating speed.
   Power in this mode is defined as the average power during the first
   10 seconds of spinup. The drive enters this mode during startup and
   from the Standby mode.

 - Seeking
   The drive moves the read/write heads to a specific location on the
   disc surface in preparation for reading from or writing to the
   disc. Read/write electronics are powered down and servo electronics
   are active. The power measured during this mode is the average
   power while executing random seeks with a 2-revolution (26.6 msec)
   dwell between Seek commands.

 - Read/write
   The drive reads from or writes to the disc. Read/write electronics
   are active and the servo is on track. The drive enters this mode
   from the Idle mode.

 - Idle
   The heads are parked in the shipping zone. The spindle is spinning
   and the cache buffer remains enabled, and the drive accepts all
   commands and returns to the Seeking or Read/write modes when it
   receives a command that requires disc access.

- Standby
  The spindle is stopped, the heads are parked in the landing zone,
  the actuator is latched, and some of the drive electronics are
  powered down. The drive sets a status flag indicating to the
  computer that it is ready to access the disc. When the drive re-
  ceives a command that does not require disc access, the drive
  remains in the Standby mode. When the drive receives a command that
  requires disc access, it spins up and performs the command.


 Access time
 -----------
 Seek time is measured under nominal conditions of temperature and
 voltage with the drive mounted horizontally. Seek time is a true
 statistical average of at least 5,000 seeks.

 Track-to-track seek time is the average of all possible single-track
 seeks in both directions. Average seek time is measured by executing
 seeks in both directions between random cylinders.

 Full-stroke seek time is half the time needed to seek from track 0 to
 the maximum track and back to track 0.

 Host overhead varies between systems and cannot be specified. Drive
 internal overhead is measured by issuing a no-motion seek and is
 typically less than 0.5 msec.

   +--------------+----------------+--------------+------------+
   |Track-to-track| Average/Typ    | Full stroke  | Average    |
   |seek time     | seek time      | seek time    | latency    |
   +--------------+----------------+--------------+------------+
   |4.0 msec max. | 14.0 msec write| 25.0 msec max| 6.67 msec  |
   |3.5 msec typ. | 12.0 msec read |              |            |
   +--------------+----------------+--------------+------------+


