SEAGATE TECHNOLOGY, INC.
Customer Technical Support FAX Network +1 408 438-8137
Customer Technical Support Bulletin Boards (300-9600, 8-N-1)
ЪДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДВДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДї
і United States +1 408 438-8771 і United Kingdom +44 628 478011 і
ГДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДЕДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДґ
і Germany +49 89 140-9331 і Singapore +65 227-2217 і
АДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДБДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДЩ
(C)opyright 1994
ST-31250W/WC SCSI-2 Fast Wide (Barracuda 2LP)
ЙННННННННННН»
є REAR VIEW є (ST-31250W only)
ИНННННННННННј
ЪДДДДД ID 8
іЪДДДД ID 4
ііЪДДД ID 2
іііЪДД ID 1
(TOP) J5 іііі
___________________ ЪДД Д1ї/ННННННННН\
Н( ЧЧЧЧЧЧЧЧЧЧЧЧЧЧЧЧЧ1)Ні::::::іі 0 0 0 0 ЖН
\ДДДДДДДДДДДДіДДДД/ А ДД ЩАД5ДGДGД12Щ
68 pin I/O CableЩ іі
Connection іі (o o) - These pins not on
іі o o differential model WD
Spindle Synch Cable Connector ДДЩі o o
(pin-11 SSREF, pin-12 ground) і 2 1
Remote LED Connector ДДДДДДДДДДДДЩ і
[pin-9 cathode (neg), і
pin-10 anode (pos)] і
і
і
ЪД J1 Terminator options ДБД (single-ended) ДДДДДДДДДДДї
і o o (o o) o o o o ХoНoё і
і o o oХoё Хoёo ХoСoё o o і
і ХoНoё oіoі іoіo іoіoі o o і
і 2ННН1 2 ФН1 2Нѕ 1 2НПН1 2 1 і
і A B C D E і
АДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДЩ
A - Term. power from drive (default)
B - Term. power to SCSI bus (only option available for
differential WD)
C - Term. power from SCSI bus
D - Term. power to SCSI bus and drive
E - Enable SCSI terminator (jumper on pins 5-6)
ЙННННННННННН»
є REAR VIEW є (ST-31250WC only)
ИНННННННННННј
80 pin I/O and DC Power Wall/bracket Connection
і Female
J1 /ДДДДіДДДДДДДДДДДДДДД\ TOP (HDA)
НННННННННН/ ЧЧЧЧЧЧЧЧЧЧЧЧЧЧЧЧЧЧЧЧ \НННННННННН
(\Д1ДДДДДДДДДДДДДДДДДД40/) BOTTOM
Notes on 80 pin I/O connector:
pins 1 - 4 = +12v 41 - 44 = 12v GND
34 - 36 = +5v 74 - 76 = 5v GND
37 = SYNC 77 = LEDC
38 = MTRON 78 = DLYDST
39 = SCSIA0 79 = SCSIA1
40 = SCSIA2 80 = SCSIA3
Mating WC connector: AMP US p/n: 2-557103-1 straight-in, Male 80-pin
2-557101-1 right angle to PCB
ЙННННННННННННННННН»
є RIGHT SIDE VIEW є (ST-31250W/WC)
ИНННННННННННННННННј
BACK ХНё J2 123456789 TOP (HDA) FRONT
OF I/OЖННННННННННННННННННННННPНWНAННННННННННННННННННННННН OF
DRIVE ФНѕ ::::::::: BOTTOM DRIVE
ііііііііі
1-2 Reserved ДДБЩііііАББДД Reserved 7-9
3 Parity Disable ДДДДЩііАДДДДД Delay Motor Start 6
4 Write Protect ДДДДДЩАДДДДДД Motor Start Enable 5
ЙНННННННННННН»
є FRONT VIEW є (ST-31250W/WC) ЪДДДДДДД +5V
ИННННННННННННј іЪДДДДДД Enable SCSI terminator
ііЪДДДДД ID 8
іііЪДДДД ID 4
ііііЪДДД ID 2
іііііЪДД ID 1 (J4 top row)
TOP (HDA) іііііі1
ННPНWНAНННННННННННННННННННННµ::::::::::ЖНН J4
BOTTOM іііііііііі
іііііііііі (J4 bottom row)
Reserved ДБББЩіііііі
No connection ДДДДДЩііііі
Ground ДДДДДДЩіііі
Unit Active LED pin (+) ДДДДДДДЩііі
SSREF (+) spindle sync ДДДДДДДДЩіі
Vendor Unique ДДДДДДДДДЩі
Fault LED pin (+) ДДДДДДДДДДЩ
ST-31250W
Barracuda 2LP
UNFORMATTED CAPACITY (MB) ________________1205.3
FORMATTED CAPACITY (xx SECTORS) (MB) _____1020.9
AVERAGE SECTORS PER TRACK ________________107 rounded down
ACTUATOR TYPE ____________________________ROTARY VOICE COIL
TRACKS ___________________________________18,555
CYLINDERS ________________________________3,711 user
HEADS ______PHYSICAL______________________5
DISCS (3.5 in) ___________________________3
MEDIA TYPE _______________________________THIN FILM
RECORDING METHOD _________________________ZBR RLL (1,7)
INTERNAL TRANSFER RATE (mbits/sec)________47.5 to 72.0
EXTERNAL TRANSFER RATE (mbyte/sec) _______5 Async
EXTERNAL TRANSFER RATE (mbyte/sec) _______5.0 to 20 Sync
SPINDLE SPEED (RPM) ______________________7,200
AVERAGE LATENCY (mSEC) ___________________4.17
BUFFER ___________________________________512 KByte
Read Look-Ahead, Adaptive,
Multi-Segmented Cache
INTERFACE ________________________________SCSI-2 FAST Wide
BYTES PER TRACK __________________________64,160 average
SECTORS PER DRIVE ________________________
TPI (TRACKS PER INCH) ____________________4,048
BPI (BITS PER INCH) ______________________73,820
AVERAGE ACCESS (ms) (read/write)__________8.0/9.0
Drive level without controller overhead
SINGLE TRACK SEEK (ms) ___________________0.6/0.9
MAX FULL SEEK (ms) _______________________17/19
MTBF (power-on hours) ____________________800,000
SHOCK (G's):
operating (Read/Write) __________2
nonoperating ____________________50
ACOUSTICS (typ/max dBA) __________________4.7/
POWER REQUIREMENTS: +12V START-UP (amps) _1.26
+12V TYPICAL (amps) __0.88 idle
+5V START-UP (amps) __0.91
+5V TYPICAL (amps) ___0.33 idle
IDLE (watts) _________
LANDING ZONE (cyl) _______________________AUTO PARK
IBM AT DRIVE TYPE ________________________0 or NONE
Physical:
Height (inches/mm): 1.00/25.4
Width (inches/mm): 4.00/101.6
Depth (inches/mm): 5.75/146.05
Weight (lbs/g): 1.2/545
Already low-level formatted at the factory with 9 spare sectors
per cylinder and 1 spare cylinder per unit.
ZBR = Zone Bit Recording = Variable sectors per track
Seagate reserves the right to change, without notice, product
offerings or specifications. (08/25/94)