Hard Drive: SEAGATE: ST151 42MB 3.5"/HH MFM ST412
S T 1 5 1 SEAGATE
NO MORE PRODUCED Native| Translation
------+-----+-----+-----
Form 3.5"/HH Cylinders 977| | |
Capacity form/unform 42/ 51 MB Heads 5| | |
Seek time / track 24.0/ 8.0 ms Sector/track 17| | |
Controller MFM / ST412 Precompensation 65535
Cache/Buffer KB Landing Zone
Data transfer rate 0.625 MB/S int Bytes/Sector 512
0.625 MB/S ext
Recording method MFM operating | non-operating
-------------+--------------
Supply voltage 5/12 V Temperature *C 10 50 | -40 60
Power: sleep W Humidity % 8 80 | 5 90
standby 8.0 W Altitude km -0.304 3.048| -3.040 9.144
idle W Shock g 2 | 50
seek 9.0 W Rotation RPM 3600
read/write W Acoustic dBA 40
spin-up W ECC Bit 32
MTBF h 150000
Warranty Month
Lift/Lock/Park YES Certificates CSA,FCC,TUV,UL478,VDE
Layout
SEAGATE ST151 PRODUCT MANUAL 36130-003, REV.C
Optional LED Connector
+-------+-+-----------------------------------------------+
.. LED +-+ |XX
| |XX J2
| |XX
| |XX
| JP7 |XX
| 1+--+ |
| | | |XX
| | | |XX
| +--+ |XX J1
| |XX
| Resistor +-+ |XX
| Termination | | |XX
| Pack | | |XX
| +-+ |XX
| |
+---------------------------------------------------1XXXXX+
J3 Power
Jumpers
SEAGATE ST151 PRODUCT MANUAL 36130-003, REV.C
Jumper setting
--------------
x = Factory setting
JP7 Drive select Configuration Jumper block
----------------------------------------------
+-------------+------+------+------+------+
|Drive Select | 9-10 |11-12 |13-14 |15-16 |
+-------------+------+------+------+------+
|Drive 4 |CLOSED|OPEN |OPEN |OPEN |
|Drive 3 |OPEN |CLOSED|OPEN |OPEN |
|Drive 2 |OPEN |OPEN |CLOSED|OPEN |
|Drive 1 |OPEN |OPEN |OPEN |CLOSED|
+-------------+------+------+------+------+
The Drive Select line enables the controller to select and adress
the drive. Control cable interface options may use either a daisy-
chain or radial configuration.
JP7 Manufacturing test
-----------------------
x 7- 8 OPEN Do not install a jumper on the Manufacturing Test
jumper on the user configuration jumper block.
This setting is only to be used at the factory
during drive testing. If a jumper is installed at
this position, the drive will ignore all control
signals and seek continuously between Track 0 and
the maximum data cylinder.
JP7 Not used
-------------
5- 6 Not used
JP7 Recovery Mode
-----------------
x 3- 4 OPEN Recovery Mode is selectable option which is en-
abled by shorting pins 3 and 4 at JP7.
JP7 Radial/Daisy-Chain Mode
----------------------------
x 1- 2 OPEN Daisy-Chain-Configuration
A Daisy-Chain configuration allows connection of
a maximum of two drives on a common control cable.
A separate data cable is required for each drive.
The last drive in the chain (physically farthest
from the controller) requires termination. All
other drives should not be terminated. The maxi-
mum permitted cable length from the controller to
the last drive is 10ft (0.31m).
1- 2 CLOSE Radial Configuration
To configure the drive radially, install a jumper
on pins 1 and 2 of the user configuration jumper
block. If you configure the drive radially, leave
the resistor terminator packs installed on all
drives. Each radially connected drive has its own
control and data cable. Drives in this configu-
ration always remain selected.
J3 DC Power and pin connector assignments
------------------------------------------
+------------+ pin 1 +12 VDC
| 1 2 3 4 | pin 2 +12 VDC Gnd
+------------+ pin 3 + 5 VDC Gnd
pin 4 + 5 VDC
Install
SEAGATE ST151 PRODUCT MANUAL 36130-003, REV.C
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!
Never install PC board on the Top!
The drive may be mounted horizontally with the PC board down or on
either side. Mounting vertically on either end is a prohibited orien-
tation.
The drive should not be tilted front or back, in any position, by
more than 5*. For optimum performance, the drive should be formatted
in the same position as it will be mounted in the host system.
The mounting screws must not exceed inside the mounting feet more
than 3.2 mm, measured from the outside surface of the foot.
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.
Shipping zone
-------------
Upon power-down, the read/write heads automatically move to the ship-
ping zone. The shipping zone is an area inboard from the maximum
data cylinder. When power is applied, the heads will recalibrate to
Track 0.
FCC Verification
----------------
WARNING: The drives are intended to be contained solely within a per-
sonal computer or similar enclosure (not attached to an external de-
vice). As such, a drive is considered to be a subassembly even when
individually marketed to the customer. As a subassembly, no Federal
Communications Commission authorization, verification or certifica-
tion of the drive is required.
Seagate Technology, Inc. has tested these devices in an enclosure as
described above to ensure that the total assembly (enclosure, disk
drive, motherboard, power supply, etc.) does comply with the limits
for a Class B computing device. Operation with non-certified assem-
blies is likely to result in interference to radio and television
reception.
Handling and Static-Discharge Precautions
-----------------------------------------
After unpacking, and prior to system integration, the drive may be
exposed to potential handling and ESD hazards. It is mandatory that
you observe standard static-discharge precautions. A grounded wrist-
strap is preferred. Handle the drive by the frame only and always
rest the drive on a padded surface until it is mounted in the host
system.
Input Noise ----------- Maximum permitted input noise ripple: 100 mV (peak-to-peak) Maximum permitted input noise: 20 MHz. Ripple measured at the host system power supply across an equivalent 20 resistive load on the +12 V line and an equivalent 8 load on the +5 V line.
DC Power specifications
-----------------------
Power may be applied or removed in any sequence without loss of data
or damage to the drive, except during a write operation. Typical
current and power specifications assume nominal voltages applied,
25*C ambient temperature, sea level and spindle rotating.
Voltage tolerance (incl. ripple): 5%
Recording Method
----------------
The ST151 is designed to operate with the ST412 interface with MFM
encoding at 5.0 Mbits/sec. transfer rate.
Caution: Operation of an MFM-certified drive with an RLL controller
is not approved by Seagate and may void your warranty.
Precompensation
---------------
The ST151 does not require precompensation
Radial/Daisy-Chain Mode
------------------------
The ST151 can be configured in either Radial or Daisy-Chain mode.
Radially-selected drives are allways selected. The Radial option is
enabled by shorting pins 1-2 at JP7. The resistor termination pack
must remain installed on any radially-selected drive. In a Daisy-
Chain, the last drive on the chain must have the resistor pack
installed.
Write Fault
-----------
Write fault is indicated by a latched signal on the interface. It can
be cleared by deselecting the drive or with a power-off/on cycle.
When the Radial configuration jumper (pins 1-2 at JP7) is used, the
drive is continuously selected and requires a power on/off cycle to
clear Write Fault.
Auto Truncation
---------------
If the controller issues an exessive number of step pulses that would
place the read/write heads outside Track 0, or inside the maximum
track, the drive enters auto-truncation mode.
Error Codes
-----------
The drive LED is enabled by the Drive Select line. If the drive is
not selected, you can identify the error code using an oscilloscope.
The signal is output on Port Pin 3 of the microcontroller chip.
The LED flash is synchronized with a long pause (no light). The most
significant bit (MSB) is flashed first. The least significant bit
(LSB) is flashed last. A long flash indicates logical one. A short
flash indicates logical zero.
The 4-bit codes for error signals are listed below:
Error Code | Description
-----------+-------------
0000 | Spindle motor failed to spin-up
0001 | No index from servo
0010 | Could not calibrate for loop offsets
0011 | Cannot find Track 0 during recalibration
0100 | Spindle motor speed out of tolerance during start up
0101 | Drive could not settle
0111 | Voice-coil motor drifting while in position loop
1001 | Failure to unlatch
1010 | Voice-coil motor circuit nonfunctional
1100 | Illegal guardband interrupt, cannot recover
1110 | Spindle motor speed out of tolerance during idle loop
Features
SEAGATE ST151 PRODUCT MANUAL 36130-003, REV.C
Media Defects
-------------
A media defect is a read error when the data, which has been
correctly written, cannot be recovered within 16 retries.
A label is fixed to the drive listing the location of any media
defects by cylinder, head and bytes from index. For MFM encoding,
this is based on 1.6 sec./byte.
There will be no more than forty-two (42) defects total per drive.
Cylinders 0, 1, 2 and 3 are free of defects.
Mean Time Between Failures (MTBF)
---------------------------------
At nominal power, sea level and 25*C ambient temperature, 150.000
power-on hours.
Mean Time To Repair
-------------------
MTTR is the average time taken by a well-trined service mechanic to
diagnose and repair a drive malfunction. The drive is designed for a
MTTR of 30 Minutes.
Access Time Definition and Timing
---------------------------------
Access time is defined as the time from the leading edge of the first
step pulse received to Seek Complete, including setting. All seek
times are true statistical averages and are calculated with a step
pulse of 10 sec., nominal power, sea level and 25*C ambient tempera-
ture.
Track-to-track access time is the average of all possible single-
track seeks in both directions.
Minimum step pulse wdth:1.5 sec.
The ST151 will accept step pulse periods from 3 to 200 sec.
However, access times have been optimized for a 3 to 25 sec. step
pulse period. Access times will degrade with step pulse periods
greater than 25 sec.
| ST151 |
----------------------------------+--------+
Track-to-Track msec. typ. | 8 |
msec. max. | 10 |
Average msec. typ. | 24 |
Average msec. max. | 25 |
Full-Stroke msec. typ. | 40 |
msec. max. | 42 |
Latency msec. avg. | 8.33 |
----------------------------------+--------+
Bit Jitter
----------
Bit jitter reduction determines the relationship between the leading
edge of read data and the center of the data window.
The specified read error rates are based on the following bit jitter
specifications: the data separator must provide at least -40dB of
bit jitter reduction at 2F with an offset of less than 1.5 nsec.
shift from the center of the data window.
UL/CSA Listing
--------------
The St151 is listed in accordance with UL 478 and CSA C22.2
(0-M1982), and meet all applicable sections if IEC 380 and VDE
0806/08.81, as tested by TUV-Rheinland, North America.
General
SEAGATE SUPPORT SERVICES
Seagate Technology
------------------
Technical Support Services
If you need assistance installing your drive, consult your dealer.
Dealers are familiar with their unique system configurations and can
help you with system conflicts and other technical issues. If you
need additional assistance with your Seagate(r) drive or other
Seagate products, use one of the Seagate technical support services
listed below.
SeaFONE at 1-800-SEAGATE (1-800-732-4283)
Seagate's 800 number allows toll-free access to automated self-help
services, providing answers to commonly asked questions,
troubleshooting tips and specifications for disc drives and tape
drives. This service is available 24 hours daily and requires a
touch-tone phone. If you need to speak to a technical support
engineer, dial this number and listen to the options for technical
support. (International callers can also reach this automated
self-help service by dialing 408-456-4496).
Seagate Technology online services
Using a modem, you can obtain troubleshooting tips, free utility
programs, drive specifications and jumper settings for Seagate's
entire product line. You can also download software for installing
and analyzing your drive.
SeaNET
You can obtain technical information on Seagate drives, Seagate
software and much more over the Internet from Seagate's World Wide
Web home page (http://www.seagate.com) or Seagate's ftp server
(ftp://ftp.seagate.com).
You may also send E-mail with your questions to DiscSupport@
Seagate.com or TapeSupport@Seagate.com.
SeaBOARD
SeaBOARD is a computer bulletin board system (BBS) that contains
information about Seagate's disc and tape drive products and is
available 24 hours daily. Set your communications software to eight
data bits, no parity and one stop bit (8-N-1). SeaBOARD phone numbers
are listed in the following table.
BBS Location Modem number
United States Disc: 408-434-1080; Tape: 408-456-4415
England 44-1628-478011
France 33 1-48 25 35 95
Germany 49-89-140-9331
Singapore 65-292-6973
Thailand 662-531-8111
Australia 61-2-9756-2359
Taiwan 886-2-719-6075
Seagate CompuServe forum
Online technical support for Seagate products is available on
CompuServe. To access our technical support forum, type go seagate.
This forum provides information similar to that found on SeaBOARD.
In addition, you can type questions or browse through previous
questions and answers on the forum messages.
Seagate Technology FAX services
SeaFAX
You can use a touch-tone telephone to access Seagate's automated FAX
system to receive technical support information by return FAX. This
service is available 24 hours daily.
Location Telephone number
United States 1-800-SEAGATE or 408-456-4496
England 44-1628-894084
Australia 61-2-9756-5170
Seagate technical support FAX
You can FAX questions or comments to technical support specialists 24
hours daily. Responses are sent during business hours.
Location FAX number
United States 408-944-9120
England 44-1628-890660
France 33 1-46 04 42 50
Germany 49-89-1430-5100
Australia 61-2-9725-4052
Singapore 65-293-4722
Hong Kong 852-2368 7173
Taiwan 886-2-715-2923
Korea 82-2-556-7294/4251
Seagate technical support
You can talk to a technical support specialist during business hours
Monday through Friday for one-on-one technical help. Before calling,
note your system configuration and drive model number (STxxxx). There
are several technical support phone numbers available for various
Seagate products.
Location Telephone number
United States Please dial 1-800-SEAGATE for the specific product
telephone number.
(6:00 A.M. to 11:15 A.M., 12:30 P.M. to 5:00 P.M.,
Pacific time, M-F)
England 44-1628-894083 (10:00 A.M. to 1:00 P.M., 2:00 P.M. to
5:00 P.M., M-F)
France 33 1-41 86 10 86 (9:30 A.M. to 12:30 P.M., 2:00
P.M. to 5:00 P.M., M-F)
Germany Disc: 49-89-140-9332; (9:30 A.M. to 12:30 P.M., 2:00
P.M. to 4:00 P.M., M-F)
Tape: 49-89-140-9333
Australia 61-2-9725-3366 (9:00 A.M. to 5:00 P.M., M-F)
Singapore 65-290-3998 (9:00 A.M. to 12:00 P.M., 2:00
P.M. to 5:00 P.M., M-F)
Hong Kong 852-2368 9918
Taiwan 886-2-514-2237
Korea 82-2-556-8241
SeaTDD 408-944-9121
Using a telecommunications device for the deaf (TDD), you can send
questions or comments 24 hours daily and exchange messages with a
technical support specialist between 6:00 A.M. to 11:15 A.M. and
12:30 P.M. to 5:00 P.M. (Pacific time) Monday through Friday.
Customer Service Centers
Seagate direct OEM, Distribution, System Integrator and Retail
customers should contact your Seagate Service Representative for
warranty information. Other customers contact your place of
purchase. Seagate offers comprehensive customer support for all
Seagate drives. Seagate customer service centers are the only
facilities authorized to service Seagate drives. These services are
available worldwide.
Location Telephone number FAX number
United States 1-800-468-3472; 405-949-6740
Other Americas
(Canada & Brazil) 405-949-6706; 405-949-6738
Mexico 525-546-6965; 525-546-4888
Europe, Middle
East & Africa 31-2065-43300; 31-2065-34320
Asia Pacific &
Australia 65-485-3595; 65-485-4980
Japan 81-3-5462-2904; 81-3-3462-2979
Seagate, Seagate Technology and the Seagate logo are registered
trademarks of Seagate Technology, Inc. SeaFAX, SeaFONE, SeaBOARD,
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registered trademarks of Seagate Technology, Inc. or one of its
subsidiaries. All other trademarks or registered trademarks are the
property of their respective owners.
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