S W I F T 9 4 3 5 4 - 0 9 0 IMPRIMIS
NO MORE PRODUCED Native| Translation
------+-----+-----+-----
Form 3.5"/HH Cylinders 1072| 536| 653| 335
Capacity form/unform 79/ 90 MB Heads 5| 10| 14| 16
Seek time / track 15.0/ 4.0 ms Sector/track 29| 29| 17| 29
Controller IDE / AT Precompensation
Cache/Buffer 32 KB Landing Zone
Data transfer rate 1.000 MB/S int Bytes/Sector 512
6.000 MB/S ext
Recording method RLL operating | non-operating
-------------+--------------
Supply voltage 5/12 V Temperature *C 10 50 | -40 70
Power: sleep W Humidity % 8 90 | 5 95
standby W Altitude km -0.305 3.048| -0.305 12.192
idle W Shock g 2 | 50
seek W Rotation RPM 3600
read/write 15.0 W Acoustic dBA 43
spin-up W ECC Bit 32,56
MTBF h 150000
Warranty Month
Lift/Lock/Park YES Certificates VDE
**********************************************************************
L A Y O U T
**********************************************************************
SEAGATE ST1090/1126/1162/1186/1201/1239-A PRODUCT MANUAL 36133-004
ORIGINAL AT INTERFACE CONNECTOR
===============================
+------------------------------------------------------+Power
| |XXXX
| |1234
| |
| |X1
| |XX AT
| |XX INTERFACE
XXLED |XX CONNECTOR
XX |XX
| |XX
| |XX
| |XX
| |XX
| |+-1 OPTIONS
| 10 or 14 || | JUMPER
| pin || | BLOCK
+------------------------------------------------------++-+
REORIENTED AT INTERFACE CONNECTOR
=================================
+---------------------------------------------------+
| |XXXX Power
| |1234
| | 1
| |XX
| |XX
| |XX SHROUDED AT
| |XX INTERFACE
| |XX CONNECTOR
| |XX
| |X1
| |
| 8-Pin Factory con-|+-1
| figuration Jumper || |12-Pin
| Block +---+ || |User Confi-
+---------------------------------------------+---1-++-+guration
Jumper Block
**********************************************************************
J U M P E R S
**********************************************************************
SEAGATE ST1090/1126/1162/1186/1201/1239-A PRODUCT MANUAL 36133-004
Jumper setting
--------------
x = Jumpers set from factory
--------------------------------------------------------------------
Original AT Interface Connector
--------------------------------------------------------------------
10-pin and 14-pin version have the same pin definition for pins 1-10.
The 14-pin version has 4 additional pins (11-14)
Master/Slave Jumper
-------------------
1-2 OPEN Master
CLOSED Slave
If only one drive is installed, configure the drive as a master. 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 as a slave, install a jumper on pins 1 and 2
of the the 12-pin user configuration jumper block.
To configure the drive as a master, leave pins 1 and 2 of the options
jumper block open.
Slave-Present Jumper
--------------------
5-6 OPEN Slave not installed
CLOSED Slave installed
If both the master and the slave are Swift AT interface drives, you
do not need this jumper. This is because the master can detect the
presence of the slave using the interface DASP-signal state.
If the drives in your application do not implement the DASP-signal,
install the jumper on the master drive only, (The slave drive ignores
this jumper).
To tell the master that a slave is present, install a jumper on pins
5 and 6 of the options jumper block on the master drive.
ECC Jumper
----------
7-8 OPEN 4 ECC Bytes
CLOSED 7 ECC Bytes
This jumper setting selects the number of ECC bytes transferred to or
from the host during read long and write operations. (The media
always uses seven ECC bytes. The jumper only controls the number of
bytes transferred.)
- If you install a jumper on pins 7 and 8 of the options jumper
block, seven ECC bytes are transferred.
- If you do not install a jumper on pins 7 and 8 of the options
jumper block, four ECC bytes are transferred.
Factory Test Jumper
-------------------
9-10 OPEN Normal Operation
CLOSED Factory Test
Pins 9 and 10 are used for testing during the manufacturing process;
they are not for field use.
Drive Type Jumper
-----------------
+--------+--------+---------+--------+
|DRIVE | 3-4 | 11-12 | 13-14 |
+--------+--------+---------+--------+
|ST1090A | CLOSED | OPEN | OPEN |
+--------+--------+---------+--------+
|ST1126A | OPEN | CLOSED | OPEN |
+--------+--------+---------+--------+
|ST1162A | OPEN | OPEN | OPEN |
+--------+--------+---------+--------+
|ST1201A | OPEN | OPEN | OPEN |
+--------+--------+---------+--------+
|ST1239A | OPEN | OPEN | CLOSED|
+--------+--------+---------+--------+
Jumper locations 3-4, 11-12 and 13-14 are pre-set at the factory
and should not be changed. Should the jumper setting need to be
verified, the correct settings are shown below.
--------------------------------------------------------------------
Reoriented (SHROUDED) AT Interface Connector
--------------------------------------------------------------------
The reoriented (industry-standard) AT interface version of the on-
board controller is used on the models listed in the table below.
If your drive does not have one of the part numbers listed in the
table, this section does not apply.
Model | 32K Buffer | 64K Buffer
--------+-------------+------------
ST1186A | 920048-xxx | 920039-xxx
--------+-------------+------------
ST1201A | 920046-xxx | 920045-xxx
--------+-------------+------------
ST1239A | 920047-xxx | 920044-xxx
The reoriented I/O AT interface drive can be distinguished from the
original AT interface drive by following characteristics:
- The drive has a shroud on the AT interface connector.
- The options jumper block has 12 pins, not 10 or 14 pins, as on the
original AT interface drive.
- The drive has an additional, 8-pin, factory configuration jumper
block that the original AT interface drives does not have.
In addition to the features of the original AT interface drive, the
reoriented AT interface drive has spindle synchronization.
Master/Slave Jumper
-------------------
1-2 OPEN Master
CLOSED Slave
If only one drive is installed, configure the drive as a master. 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 as a slave, install a jumper on pins 1 and 2
of the the 12-pin user configuration jumper block.
To configure the drive as a master, leave pins 1 and 2 of the options
jumper block open.
Slave-Present Jumper
--------------------
3-4 OPEN Slave not installed
CLOSED Slave installed
If both the master and the slave are Swift AT interface drives, you
do not need this jumper. This is because the master can detect the
presence of the slave using the interface DASP-signal state.
If the drives in your application do not implement the DASP-signal,
install the jumper on the master drive only, (The slave drive ignores
this jumper).
To tell the master that a slave is present, install a jumper on pins
3 and 4 of the options jumper block on the master drive.
Spindle Synchronization
-----------------------
5-6 CLOSED SPSYNC on Pin 28 enabled
11-12 Connector SPSYNC External Connection with twisted pair
The spindle clock signal (SPSYNC-) synchronizes the rotation of up to
12 drives in a system. Spindle synchronization on pin 28 is enabled
by installing a jumper on pins 5 and 6 of the 12-pin user configura-
tion jumper block. With spindle synchronization, the drives auto-
matically configure themselves in either of two ways.
- Two or more drives are connected to the host: 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.
- Two or more drives are connected to the host: the spindle synchro-
nization clock signal is generated by one of the drives.
One drive configures itself as the originator of the SPSYNC-
signal; the other drives become receivers of the SPSYNC-signal.
The slave receives the signal to synchronize its spindle with the
master and synchronize its index with the SPSYNC-signal. Synchroniza-
tion is achieved within seven seconds. The drive originating the
SPSYNC-signal sets DRDY. If a drive that was already synchronized
loses synchronization, but still works, it does not clear DRDY.
The drive may use pin 28 of the AT interface connector or pins 11 and
12 of the 12-pin user configuration jumper block to transmit and re-
ceive SPSYNC-. The spindle clock uses a single-ended TTL active low
60 Hz signal with a clock period of 16.667 msec 0.5% and a duty
cycle of sec minimum, 500 sec maximum. The spindle clock leading
edge to index leading edge is 0 sec 250 sec.
To synchronize the drive spindles, use a twisted pair as follows:
- Use one strand to connect pin 11 of the 12-pin jumper block to each
drive
- Use the other strand to connect pin 12 of the 12-pin jumper block
of each drive.
The cable should not be any longer than six feet.
12-Pin Jumper Block
-------------------
7-8 Pins Removed
9-10 Spare
8-Pin Factory Jumper Block
--------------------------
Pins OPEN CLOSED
------------------------
1-2 Normal Factory
3-4 Normal Factory
5-6 Normal Factory
7-8 Normal Factory
--------------------------------------------------------------------
Original and Reoriented (SHROUDED) AT Interface Connector
--------------------------------------------------------------------
LED jumper setting
------------------
+- Pin A removed
|
A B
+---+---+ Pin C and D ON LED Enabled
| | * | OFF LED Disabled
+---+---+
| * | * | Pin B and D are used for remote LED Hookup
+---+---+
C D
**********************************************************************
I N S T A L L
**********************************************************************
SEAGATE ST1090/1126/1162/1186/1201/1239-A PRODUCT MANUAL 36133-004
Notes on installation
=====================
Drive mounting
--------------
horizontally vertically
+-----------------+ +--+ +--+ +------------------+
| | | +-----+ +-----+ | | | x
| | | | | | | | x+----------------+x
+-+-----------------+-+ | | | | | | ||x x||
+---------------------+ | | | | | | || x x ||
| | | | | | || x x ||
x x | | | | | | || x x ||
+------x------x-------+ | +-----+ +-----+ | || xx ||
+-+------x--x-------+-+ +--+ +--+ || x x ||
| xx | || x x ||
| x x | || x x ||
+---x--------x----+ |x x|
x x x++----------------++x
UNACCEPTABLE! UNACCEPTABLE!
The drive may be mounted in the following positions:
1. Horizontally, with the drive's PC board on the top drive.
2. Horizontally, with the drive's PC board on the bottom of the
drive.
3. Vertically, on either side.
Do not mount the drive vertically on either end.
For optimum performance, format the drive in the same orientation as
it is be mounted in the host system.
Caution: To avoid potential service problems, observe the following
precautions:
- Handle the drive by the edges or frame. Do not pressure on the top
cover or touch the circuit board.
- Do not remove or cover factory-installed labels. They contain in-
formation needed to service the product.
- Do not put labels over the breather holes on the top surface of
the drive. The breather holes must remain clear to allow air
circulate.
- If a label, oher than a factory-installed label, has been placed
over the breather holes, remove it. Do not poke holes through the
label. This damages the filter underneath, allowing contaminants to
enter the drive.
- Do not use solvents to remove the adhesive residue from drive
labels. Small amounts of solvent may get into the unit and contami-
nate the disc.
- Do not plug a live DC power cable into the drive power connector.
This damages the connector contacts.
I/O Cable And Connector
-----------------------
The I/O connector is a 40-pin connector.
- For the original I/O interface connector, the odd pins are next to
the edge of the printed circuit board with pin 1 near the power
connector.
- For the reoriented I/O interface connector, the even pins are next
to the edge of the printed circuit board with pin 1 near option
jumper block.
You can recognize pin 20 because it is missing. The corresponding pin
hole on the cable connector should be plugged to prevent the possi-
bility of installing it upside down.
Note: Maximum I/O cable length is 24 inches (0.61 meters)
Shock and vibrations
--------------------
All shock and vibration specifications assume that the drive is moun-
ted in an approved orientation with the input levels at the drive
mounting screws.
During normal operating shock and vibration, there is no physical
damage to the drive and no degradation of performance.
During abnormal operating shock and vibration, there is also no phy-
sical damage to the drive. However, there may be performance degra-
dation during the shock or vibration. When normal operating shock
levels resume, drive performance is within specifications.
Shipping zone
-------------
Upon power-down, the read/write heads automatically move to the ship-
ping zone. All portions of the Head/slider assembly park inboard of
the maximum data cylinder.
When power is applied, the heads will recalibrate to Track 0.
DC Power Requirements
---------------------
Except during the write procedure, power may be applied or removed in
any sequence without losing data or damaging the drive. If your
system uses a common supply to power two drives, consider the power
requirements of each drive individually. If the units are to be
powered on at the same time, each must have peak starting current.
The +5 V and +12 V returns are tied together in the drive. However,
you should use separate returns to the power supply to minimize noise
coupling between the supplies. For each supply voltage, minimum
current loading is not less than 30% of the average operating
current.
Electro-Static Discharge
------------------------
While unpacking the drive and integrating it into your system, pro-
tect the drive from electro-static discharge by observing ESD pre-
cautions. Wearing a grounded wrist-strap is the best way to prevent
ESD damage. Handle the drive by its frame only without applying
pressure to the drive top cover or the PC board. Always rest the
drive on a padded, anti-static surface until it is mounted in the
host system.
Translation and Non-Translation Modes
-------------------------------------
The drive may be configured in either of two modes:
1. TRANSLATION MODE: Configure the drive in this mode if the number
of sectors per track and the maximum head address DO NOT match the
physical configuration.
In translation mode, set the numbers of sectors per track to be 63
or less. Set the number of heads to satisfy the following rela-
tionship:
64 (sectors/track) (heads) 511
The drive translates logical sector requests from the host into
corresponding physical sector requests. The logical sectors you
use to format the drive cannot exceed the physical capacity of the
drive.
The logical capacity of the drive is based on the following
formula:
total sectors = (logical heads) (logical sec/track) (logical cyl)
2. NON-TRANSLATION MODE: Configure the drive in this mode if the
numbers of sectors per track and the maximum head address given in
the Initialize Drive Parameters command match the physical confi-
guration.
These modes are selected using the Initialize Drive Parameters com-
mand. The numbers of sectors per track and the maximum head address
are parameters used by the Initialize Drive Parameters command.
You can verify the number of sectors per track and the number of
heads by using the Identify Drive command.
Thermal Compensation
--------------------
The drive compensates for thermal-related position offset of the
selected head. Thermal compensation is performed during startup and
every 2 minutes thereafter. The periodic compensation coincides with
a host command service operation. The last command execution time
increases by 100 msec. typical or 125 msec. maximum.
Stop and Start Time
-------------------
Within 20 seconds after DC power is applied, the drive is ready.
Within 35 seconds after DC poweris removed, the drive is stopped.
Note: Do not move the drive until the motor has come to a complete
stop.
Frame Kit and Remote LED
------------------------
If you need a frame kit, you can order one under part number
54459-010. The frame kit contains a remote LED.
FCC Verification
----------------
These drives are devices which are intended to be contained solely
within a personal computer or similar enclosure and not attached to
an external device. As such, they are considered to be subassemblies
even when individually marketed to the customer.
As a subassembly, no Federal Communications Commission authorization,
verification, or certification of the device is required.
**********************************************************************
F E A T U R E S
**********************************************************************
SEAGATE ST1090/1126/1162/1186/1201/1239-A PRODUCT MANUAL 36133-004
Media defect
------------
Media defects are classified as either correctable or uncorrectable,
depending on their type and size. Various error correction codes may
be implemented to correct errors in the data read from the disc. The
drive incorporates an internal error correction code (ECC) capable of
correcting data errors of 11 bits or less.
Your host system must be able to recognize and map defective tracks
and perform track re-allocation routines.
During manufacture, all defects are allocated to reserved cylinders.
Therefore, the total number of sectors is always equal to the format-
ted capacity.
Reliability Specifications
--------------------------
MTBF (nominal power, sea level, 25*C ambient temp.) 150,000 POH
Preventative Maintenance Not Required
MTTR 30 Minutes
Service Life 5 Years
Seek Time Definition and Timing
-------------------------------
Seek time depends on host overhead, as shown:
seek time = measured seek time - controller overhead - host overhead
Note: Overhead depends on your system. It is typically less than
1 msec.
Average seek time is a true statistical average of at least 5000
seeks between randomly selected cylinders.
Track-to-track seek time is the average of all possible single-
track seeks in both directions.
Full-stroke seek time is half the time needed to seek from track 0
to the maximum Track and back to Track 0.
----------------------------------+-------+
Track-to-Track msec. typ. | 4 |
msec. max. | 5 |
Average msec. typ. | 15 |
Average msec. max. | 17 |
Full-Stroke msec. typ. | 33 |
msec. max. | 35 |
Latency msec. avg. | 8.33|
----------------------------------+-------+
AT Interface General Description
--------------------------------
These drives are compatible with the requirements of the IBM AT bus.
Data is transferred in parallel (16 bits) from the host bus to the
sector buffer on the drive, under direction of commands previously
transferred from the host. The standard sector buffer is 32K, with an
optional 64K sector buffer available.
The drive controller performs all of the operations necessary to
properly write data on or read data from disc media. The drive stores
data read from the media in a buffer and transferred to the host in a
block when the read is complete.
The drive can be daisy-chained with a second drive if the second
meets the same interface specifications. In this configuration, one
drive is designated the master and the other the slave.
If your system only uses one drive, the master/slave and the slave-
installed jumpers are removed. If your system uses two drives, the
slave-installed jumper is installed on the master drive, and the
slave jumper is installed on the slave drive.
The physical AT interface consists of single-ended, TTL-compatible
receivers and drivers communicating through a 40-conductor flat-
ribbon, non-shielded cable with a maximum length of 24 inches
(0.61 meters) using an asynchronous interface protocol. The drivers
can sink up to 24mA and drive a load up to 300pF.
Read Look Ahead Feature
-----------------------
The Read Look Ahead feature improves performance by reading sectors
into a buffer before the sectors are actually requested by the host.
Assuming the disc is formatted for a 1:1 interleave, a series of
sequential reads of small blocks of data, rather than a single large
block, can cause a performance loss of up to one revolution per
command. The performance loss occurs when the controller is busy
sending the next Read command to the drive. During this interval, the
next sectors to be read can spin past the head. If this occurs,
reading the logical sector after the previously read sector requires
an extra revolution of the disc.
The Read Look Ahead feature improves performance by reading the
logical sector after the previously read sector into a buffer for
possible later use.
Translation and Non-Translation Modes
-------------------------------------
Swift AT interface drives operate in two modes:
1. Translation (logical) Mode: The number of bytes per sector is
always 512.
The number of sectors per track and number of heads can be
programmed using the host system. Any number of heads and sectors
per track is acceptable, within the following constraint:
64 (sectors per track)(heads) 511
2. Non-translation (physical) mode: The drive appears to the host as
described in the specifications.
UL/CSA Listing
--------------
These devices are recognized in accordance with UL 478 and UL 1950,
and certified to CSA C22.2 No. 220-M1986. They comply with VDE 0806/
8.81 and EN 60 950/1.88, as tested by VDE.