Hard Drive: SEAGATE: ST9077A 64MB 2.5"/SSL IDE / AT
S T 9 0 7 7 A SEAGATE
NO MORE PRODUCED Native| Translation
------+-----+-----+-----
Form 2.5"/SUPERSLIMLINE Cylinders 802| 669| |
Capacity form/unform 64/ MB Heads 4| 11| 15|
Seek time / track 16.0/ 5.0 ms Sector/track 39| 17| 63|
Controller IDE / AT Precompensation
Cache/Buffer 32 KB Landing Zone
Data transfer rate 1.500 MB/S int Bytes/Sector 512
4.000 MB/S ext
Recording method RLL 2/7 operating | non-operating
-------------+--------------
Supply voltage 5 V Temperature *C 5 55 | -40 70
Power: sleep 0.3 W Humidity % 8 80 | 5 95
standby 0.3 W Altitude km -0.305 3.048| -0.305 12.192
idle 0.8 W Shock g 10 | 150
seek 1.9 W Rotation RPM 3450
read/write 1.9 W Acoustic dBA 33
spin-up 3.6 W ECC Bit
MTBF h 150000
Warranty Month 12
Lift/Lock/Park YES Certificates CSA,FCC,IEC380,IEC435,IEC9...
Layout
SEAGATE ST9051/9052/9077/9096/9144-A PRODUCT MANUAL 36186-002, B
+--------------------------------------------------------+43 Ground | |XX Power | |XX p.41/42 | |XX | |XX | |XX | |XX | |.X | |XX | |XX | |XX | |XX | |XX | |X1 | | | |+-+ Master | || | Slave +--------------------------------------------------------++-+ Jumper
Jumpers
SEAGATE ST9051/9052/9077/9096/9144-A PRODUCT MANUAL 36186-002
Jumper Setting
==============
Master/Slave selection
----------------------
Jumper
+------+
| A C |
| B D |
+------+
Jumper for Pins Configuration
A and B C and D
------------------------------------------------------------------
OPEN OPEN Drive is Master, no Slave present
OPEN CLOSED Drive is Master, Seagate Slave drive present*
CLOSED OPEN Drive is Slave to another ST9144A Family
Master Drive
CLOSED CLOSED Reserved Position (Do not use)
* ST157A, ST1144A, ST351A, and ST3144A drive families.
A master/slave relationship must be established between drives on the
AT bus. Drive 1 is configured as the Master and Drive 2 is configured
as the Slave.
Install
SEAGATE ST9051/9052/9077/9096/9144-A PRODUCT MANUAL 36186-002 B
Notes on installation
=====================
Drive mounting ST9051A, ST9077A
--------------------------------
horizontally vertically
+-----------------+ +--+ +--+ +------------------+
| | | +-----+ +-----+ | | | x
| | | | | | | | x+----------------+x
+-+-----------------+-+ | | | | | | ||x x||
+---------------------+ | | | | | | || x x ||
| | | | | | || x x ||
| | | | | | || x x ||
+---------------------+ | +-----+ +-----+ | || xx ||
+-+-----------------+-+ +--+ +--+ || x x ||
| | || x x ||
| | || x x ||
+-----------------+ |x x|
x++----------------++x
Not Recommended !
Drive mounting ST9052A, ST9096A, ST9144A
------------------------------------------
horizontally vertically
+-----------------+ +--+ +--+ +------------------+
| | | +-----+ +-----+ | | |
| | | | | | | | |+----------------+|
+-+-----------------+-+ | | | | | | || ||
+---------------------+ | | | | | | || ||
| | | | | | || ||
| | | | | | || ||
+---------------------+ | +-----+ +-----+ | || ||
+-+-----------------+-+ +--+ +--+ || ||
| | || ||
| | || ||
+-----------------+ || ||
++----------------++
You can mount the drives in any of the approved orientations. Allow
a minimum clearance of 0.030-inches should be allowed around the
entire perimeter of the drive for cooling airflow.
The ST9051A and ST9077A are built with metric mounting screw threads.
Drives with metric threads can be distinguished by a notch in the
mounting boss. Screw insertion depth is limited to 0.150 inches (3.81
mm) maximum on the side mounting holes and 0.190 inches (4.82 mm)
maximum on the bottom mounting holes. The screw size allowed for the
bottom-mounting and the side-mounting holes is M3X0.5.
Note: Earlier versions of the ST9051A were built with standard
threads, size 4-40 UNC-2B. Drives with standard threads do not have a
notch cut into the mounting boss.
Caution: Do not exceed 3 inch-Ibs torque for mounting screws.
The ST9052A, ST9096A and ST9144A are built with metric mounting screw
threads. Screw insertion depth is limited to 0.15 inches (3.81 mm)
maximum on the side mounting holes and 0.19 inches (4.82 mm) maximum
on the bottom mounting holes. The screw size allowed for the
bottom-mounting and the side-mounting holes is M3X0.5.
Caution: Do not exceed 3 inch-Ibs torque for mounting screws.
AT interface
------------
The ST9144 family AT drives use the industry-standard IBM AT task
file interface. The drives support both 8-bit and 16-bit data
transfer and have no DMA capability. All data transfers are done
through programmed I/O.
Up to two drives can be daisy-chained (Master/Slave) on the same
host bus.
AT interface cable
------------------
Maximum cable length is 18 inches (457 mm). It is recommended that
the connectors be keyed by inserting a plug into the pin-20 location
of each interface connector.
AT interface connector requirements
-----------------------------------
The drive connector is a 44-conductor connector with 2 rows of 22
male pins on 0.079 inch (2 mm) centers. The mating cable connector is
a 44-conductor nonshielded connector with 2 rows of 22 female
contacts on 0.079 inch (2 mm) centers. It is recommended that the
connectors be keyed by inserting a plug into the pin 20 location of
each interface connector. Strain relief is recommended.
Recommended connector: Molex part number 87259-4413 or equivalent.
DC power specifications
-----------------------
Power is supplied to the drive through pin 41 and pin 42, ground
through pin 43 in the interface connector. Pin 44 is reserved.
Remote LED
----------
The drive indicates activity to the host through the /DASP line (pin
39) on the AT interface. This line may be connected to a drive status
indicator driving an LED to 5 VDC. This line has a 30 mA nominal
current limit.
Shipping zone
-------------
At power-down the read/write heads automatically move to the shipping
zone. The head and slider assembly park indide of the maximum data
cylinder.
Input Noise
-----------
Maximum permitted input noise ripple 150 mV (peak-to-peak)
Maximum permitted input noise 10 MHz
Onboard drive diagnostics
-------------------------
At power-on the drive executes a series of diagnostics tests. A
series of LED flashes on the system panel indicates a failure.
Error Codes
LED Flashes Drive Error Condition
------------------------------------------
1 80C198 Microprocessor Error
2 80C198 ROM Checksum Error
3 AT Interface Chip Error
5 External RAM Error
6 Buffer RAM Error
Features
SEAGATE ST9051/9052/9077/9096/9144-A PRODUCT MANUAL 36186-002 B
UL/CSA listing
--------------
The ST9144 family drives are listed in accorance with UL 1950 and CSA
C22.2 (950-M-89), and meet all applicable sections of IEC 380, IEC
435, IEC 950, VDE 0806/08.81 and EN 60950 as tested by TUV-Rheinland,
North America.
Warning: The ST9144 family drives are devices intended to be contain-
ed solely within a personal computer or similar enclosure and not
attached as an unenclosed external device. As such, the drive is
considered to be a subassembly even when it is individually marketed
to the customer.
Acoustics
---------
ST9052A: 30dBA maximum (sound pressure) in Idle mode, at 1 meter.
All other ST9144 family drives: 33 dBA maximum (sound pressure) in
Idle mode, at 1 meter.
Seek time definition
--------------------
Seek time is a true statistical average (at least 5,000 measurements)
of seek time, less overhead. All measurements are made with nominal
power at sea level and 25*C ambient temperature.
Track-to-track seek time is an average of all possible single-track
seeks in both directions. Average seek time is measured by executing
seek commands between random sector addresses.
Full-stroke seek time is one-half the time needed to seek from the
first data sector to the maximum data sector and back to the first
sector.
Note. Host overhead varies between systems and cannot specified.
Controller overheads for the drives is 1 msec typical.
Seek Time | |ST9144A| |
--------- | |ST9096A| |
|ST9051A|ST9052A|ST9077A |
----------------------------------+-------+-------+--------+
Track-to-Track msec. typ. | 6 | 5 | 5 |
msec. max. | 8 | 8 | 8 |
Average msec. typ. | 19 | 16 | 16 |
Average msec. max. | 20 | 19 | 19 |
Full-stroke msec. typ. | 36 | 27 | 27 |
msec. max. | 38 | 30 | 30 |
Latency msec. avg. | 8.26 | 8.70| 8.46 |
----------------------------------+-------+-------+--------+
AT bus signal levels
--------------------
Signals driven by the drive must have the following output character-
istics at the drive connector:
Logic Low 0 to 0.4 VDC
Logic High 2.5 to 5.25 VDC
Signals received by the drive must have the following input
characteristics, measured at the drive connector:
Logic Low 0 to 0.8 VDC
Logic High 2.0 to 5.25 VDC
Reliability
-----------
MTBF 150,000 POH (nominal power, at sea level, 25*C ambient
temperature).
PM Not required
MTTR 10 minutes
Service Life 5 years
My Books
