S T 3 5 2 A SEAGATE
NO MORE PRODUCED Native| Translation
------+-----+-----+-----
Form 3.5"/SLIMLINE Cylinders | 980| 977|
Capacity form/unform 42/ 51 MB Heads 2| 5| 5|
Seek time / track 28.0/ 7.0 ms Sector/track | 17| 17|
Controller IDE / AT Precompensation
Cache/Buffer KB Landing Zone
Data transfer rate 1.250 MB/S int Bytes/Sector 512
MB/S ext
Recording method RLL 2/7,ZBR operating | non-operating
-------------+--------------
Supply voltage 5/12 V Temperature *C |
Power: sleep W Humidity % |
standby W Altitude km |
idle 2.0 W Shock g |
seek W Rotation RPM 3048
read/write W Acoustic dBA
spin-up W ECC Bit
MTBF h 150000
Warranty Month
Lift/Lock/Park YES Certificates
**********************************************************************
L A Y O U T
**********************************************************************
SEAGATE ST352A/X PRODUCT MANUAL
+---------------------------------------------------------+
| User 12-------2 |XX 3-pin
| Configuration+--------+ |xx Power
| Jumper block |XX
| |XX AT/XT
| |XX Inter-
| |XX face
| |XX
| |.X
| |XX
| |XX
| |XX
| |XX
| |X1
| |
| |XX 4-pin
| |XX Power
+---------------------------------------------------------+
**********************************************************************
J U M P E R S
**********************************************************************
SEAGATE ST352A/X PRODUCT MANUAL
Jumper setting
==============
AT
User Configuration jumper block (12-pin)
----------------------------------------
+12-10-8--6--4--2+
|O O O O O O|
|O O O O O O|
+11-9--7--5--3--1+
+----------------+ +----------------+
Drive is |O O O O O X| |O O O O X X| Slave drive
master |O O O O O X| |O O O O X X| present
+----------------+ +----------------+
+----------------+ +----------------+
Drive is |O O O O O O| |xxxx O O O O| Bus Reset HIGH
slave |O O xxxx O O| |O O O O O O|
+----------------+ +----------------+
+----------------+
Bus Reset |X O O O O O|
LOW |X O O O O O|
+----------------+
The bus reset active level is systemdependent. You must install a
jumper in one of these positions for the drive to operate.
+----------------+ +----------------+
Drive |O O O X O O| |O O O O O O| Factory test
activity LED|O O O X O O| |O xxxx O O O| only (Do Not
(Optional, +----------------+ +----------------+ Use)
master only)
Drive activity LED
------------------
To cause the drive to use the DASP signal to indicate bus activity
through a remote LED, install a jumper on pins 5 and 6. This
jumper can only be installed on the master drive. (On the slave
drive, the DASP- signal indicates that a slave is present.
Factory Test
------------
Not recommended for field use. When a jumper is installed on pins 7
and 9, the actuator continuously seeks between track 0 and the
maximum data track and ignores any signals sent through the inter-
face.
Master/Slave
------------
You can install up to two drives on a single AT bus if you use a
daisy-chain cable. Table below describes how to install the jumpers.
+----------------+---------+---------+---------+
|System | Pins | | |
|Configuration | 1 and 2 | 3 and 4 | 5 and 7 |
+----------------+---------+---------+---------+
|Only drive in | CLOSED | OPEN | OPEN |
+----------------+---------+---------+---------+
|Master in a two-| | | |
|drive system | CLOSED | CLOSED | OPEN |
+----------------+---------+---------+---------+
|Slave in a two- | | | |
|drive system | OPEN | OPEN | CLOSED |
|system | | | |
+----------------+---------+---------+---------+
XT jumpers
==========
User Configuration jumper block (12-pin)
----------------------------------------
+12-10-8--6--4--2+
|O O O O O O|
|O O O O O O|
+11-9--7--5--3--1+
XT mode (Always
installed)
+----------------+
|O O X O O O|
|O O X O O O|
+----------------+
ST352X only ST352X only
Full capacity (40 MB) 30-MB capacity
+----------------+ +----------------+
|O O O O O X| |O O O O X O|
|O O O O O X| |O O O O X O|
+----------------+ +----------------+
ST351X only
20-MB capacity Bus Reset HIGH
+----------------+ +----------------+
|O O O O X X| |xxxx O O O O|
|O O O O X X| |O O O O O O|
+----------------+ +----------------+
Bus Reset LOW
+----------------+
|X O O O O O|
|X O O O O O|
+----------------+
The bus reset active level is system-dependent. You must install a
jumper in one of these positions for the drive to operate.
Drive activity
LED (Optional, Factory test only
master only) (Do Not Use)
+----------------+ +----------------+
|O O O X O O| |O O O O O O|
|O O O X O O| |O xxxx O O O|
+----------------+ +----------------+
Drive capacity options
----------------------
To specify different capacities for the ST352X drive install the
jumpers.
Bus Reset (HIGH and LOW)
------------------------
The setting of this jumper depends on the system. A jumper must be
installed in either the HIGH or LOW position for the drive function.
Drive activity LED
------------------
When a jumper is installed on pins 5 and 6, the drive uses the DASP-
signal to indicate bus activity through a remote LED.
Factory Test
------------
Not recommended for field use. When a jumper is installed on pins 7
and 9, the actuator continuously seeks between track 0 and the
maximum data track and ignores any signals sent through the inter-
face.
3-pin DC power
--------------
---+---------+---
| 3 2 1 | <--- key
+-+--+--+-+
| | +------- + 5 VDC
| +---------- +12 VDC
+------------- Ground
4-pin DC power
--------------
----+------------+----
| 4 3 2 1 |
+-+--+--+--+-+
| | | +------- +12 VDC
| | +---------- +12 VDC return
| +------------- + 5 VDC return
+---------------- + 5 VDC
**********************************************************************
I N S T A L L
**********************************************************************
SEAGATE ST352A/X PRODUCT MANUAL
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
PROHIBITED! PROHIBITED!
You must mount the drive within 5* of a vertical or horizontal axis.
Mounting the drive
------------------
For optimum performance, format the drive in the same orientation as
you intend to mount it in the host system. Allow a minimum clearance
of 0.050-inch around the entire drive envelope for cooling airflow
and movement during shock or vibration. Shock mounts placed between
the drive and the host frame should be designed so that the system
has a vertical resonant frequency of 25 Hz or less.
Bottom mounting
---------------
Insert four mounting screws not more than 0.200 inches (6 full turns)
into the drive frame. If you use a screw that is too long, you could
damage the drive.
Standard side mounting
----------------------
Insert four mounting screws not more than 0.125 inches (4 full turns)
into the drive frame. If you use a screw that is too long, you could
damage the drive.
Three-hole side mounting
------------------------
If your system does not allow you to use all four mounting points,
you can mount the drive satisfactorily using only three screws.
Use 6-32 UNC-2A screws on drives with standard-size mounting holes.
These drives have an "S" stamped on the frame runner. Use M4 screws
on drives with metric mounting holes. These drives have an "M"
stamped on the frame runner.
Caution: Be careful not to over-tighten the screws - you could damage
the drive. (Max torque: 6 inch-Ibs).
Acoustics
---------
At a distance of 1 meter, the drive creates a sound pressure of 35
dBA at idle.
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.
AT/XT interface connector
-------------------------
The interface cable connector is a 40-pin connector with two rows of
20 pins on 100 mil centers. The maximum cable length is 18 inches
(0.457 meters). Strain relief is recommended. Recommended cables are
shown below.
AMP P/N 1-499496-0
DuPont P/N 66900-040
A dual-drive AT system requires an AT interface daisy-chani cable. A
dual-drive XT system requires two separate XT interface cables. The
ST352A/X family drives do not use terminating resistors.
**********************************************************************
F E A T U R E S
**********************************************************************
SEAGATE ST352A/X PRODUCT MANUAL
AT and XT power-on diagnostics
------------------------------
If an error condition is detected during the power-on diagnostics,
the LED flashes to indicate the cause of the failure.
LED flash codes
+--------------------------------------------------------------+
|Number of |
|LED flashes Description of problem |
+--------------------------------------------------------------+
| 1 Microprocessor memory failure |
+--------------------------------------------------------------+
| 2 Program ROM memory checksum error |
+--------------------------------------------------------------+
| 5 Program RAM access error |
+--------------------------------------------------------------+
| 6 Buffer memory access error |
+--------------------------------------------------------------+
| 7 Drive not ready |
+--------------------------------------------------------------+
| 8 Error uploading RAM |
+--------------------------------------------------------------+
| 9 Program RAM not compatible with ROM |
+--------------------------------------------------------------+
| 10 Read/Write sequencer chip diagnostics error |
+--------------------------------------------------------------+
| 11 Program RAM checksum error |
+--------------------------------------------------------------+
| 12 Error uploading defect data |
+--------------------------------------------------------------+
| 13 Defect data checksum error |
+--------------------------------------------------------------+
| 17 Spindle failure |
+--------------------------------------------------------------+
| 18 or 19 Invalid defect tables |
+--------------------------------------------------------------+
Maximum logical parameters
--------------------------
All cylinder, head, and sector geometries are limited to:
- The maximum specified below, and
- The constraints of the following two relations:
(heads) x (sectors per track) 255
(cylinders) x (heads) x (sectors per track) guaranteed sectors
Cylinders 1,024
Logical heads 16
Sectors per track 128
Reliability
-----------
MTBF power on-hours 150,000
MTTR (minutes) 30
Service life (years) 5
The specification for MTBF, above, assumes nominal power at sea level
and an ambient temperature of 25*C.
Environment
-----------
The ST352A/X family drives are listed in accordance with UL 478 and
CSA (0-M1982) and meet all applicable sections of VDE 0806/08.81 and
IEC 380, as tested by TUV-Rheinland, North America.
Input noise
-----------
The input noise was measured at the host system power supply across
an equivalent 20-ohm resistance on the +12 VDC line and an equivalent
8-ohm resistance on the +5 VDC line.
Permitted input noise ripple (max) 100mV (peak-to-peak)
Permitted input noise frequency (max) 20 MHz