1 9 4 3 5 7 COMPAQ
NO MORE PRODUCED Native| Translation
------+-----+-----+-----
Form 3.5"/SLIMLINE Cylinders | 768| |
Capacity form/unform 341/ 399 MB Heads 3| 14| |
Seek time / track 12.0/ 3.5 ms Sector/track | 62| |
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...
**********************************************************************
L A Y O U T
**********************************************************************
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
**********************************************************************
J U M P E R S
**********************************************************************
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.
**********************************************************************
I N S T A L L
**********************************************************************
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.
**********************************************************************
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