SEAGATE TECHNOLOGY, INC.

SEAGATE TECHNOLOGY, INC.
Customer Technical Support FAX Network +1 408 438-8137
Customer Technical Support Bulletin Boards (300-9600, 8-N-1)
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� United States +1 408 438-8771 � United Kingdom +44 628 478011 �
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(C)opyright 1993

ST-15150N SCSI-2 Fast (Barracuda 4)

��ͻ J01��Ŀ 1Ŀ ��J4-1��Ŀ
� REAR VIEW � (see �ĳ� �"� �
��ͼ below)�� "� �
�"�J4 1-11 �
Terminating ResistorsĿ �"�(see detail below) �
��Ŀ ��ĳĿ �"� �
(TOP) ��1 ��1 �"��J4-11� �
��/��\ � �
͵::::::::::::::::::::::::1Ƴ 0 0 0 0 ��
��ͳ��5�G�G�12� � 5 1
50 pin I/O Cable Connection�� : : : : : : : : : : :
� � � � � � � � 6 � 2
SCSI ID = 0 (none) � � � � � � � � � � �
SCSI ID = 4 ��
SCSI ID = 2 ��
SCSI ID = 1 ��
Reserved (default OFF) ��
Parity Disable ��
Enable Motor Start ��
Delay Motor Start (10 sec * ID) ��
Write Protect Enable ��
Remote LED Connector ��
[pin-5 cathode (neg), pin-6 anode (pos)] � �
Reserved (default OFF) ��
Spindle Synch Cable Connector ��
(pin-1 SSREF, pin-2 ground)

�� ST-15150N only ��Ŀ
� J01 - Terminator Power 2x3 jumper block �
��
2�͸
Enable Drive Terminators ��
1��

Terminator power from the drive. ��͸
(default) ��
1� � �

Terminator power from pin 26 on the �͸
SCSI bus. � ��
1� ��

Terminator to the SCSI bus on pin 26. �͸
��
1��

Terminator power to the SCSI bus and ��͸
drive. ��
1��

Note: ST-15150ND (differential model) does not come with any
provision to use Termination resistors. Therefore, SCSI bus
needs to be externally terminated.

�� ST-15150ND only ��Ŀ
� J01 - Terminator Power 2x2 jumper block �
��
1�͸ 2
Terminator to the SCSI bus on pin 26. ��
(all other J01 jumper positions are ��
invalid)

ST-15150N

UNFORMATTED CAPACITY (MB) ________________5062
FORMATTED CAPACITY (xx SECTORS) (MB) _____4294
AVERAGE SECTORS PER TRACK ________________107 rounded down
ACTUATOR TYPE ____________________________ROTARY VOICE COIL
TRACKS ___________________________________77,931
CYLINDERS ________________________________3,711 user
HEADS ______PHYSICAL______________________21
DISCS (3.5 in) ___________________________11
MEDIA TYPE _______________________________THIN FILM
RECORDING METHOD _________________________ZBR RLL (1,7)
INTERNAL TRANSFER RATE (mbits/sec)________47.4 to 71.9
EXTERNAL TRANSFER RATE (mbyte/sec) _______4 Async
EXTERNAL TRANSFER RATE (mbyte/sec) _______10 Sync
SPINDLE SPEED (RPM) ______________________7,200
AVERAGE LATENCY (mSEC) ___________________4.17
BUFFER ___________________________________1024 KByte
Read Look-Ahead, Adaptive,
Multi-Segmented Cache
INTERFACE ________________________________SCSI-2 FAST
BYTES PER TRACK __________________________64,773 average
SECTORS PER DRIVE ________________________7,812,500
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) _2.18
+12V TYPICAL (amps) __0.83 idle
+5V START-UP (amps) __1.0
+5V TYPICAL (amps) ___0.76 idle
IDLE (watts) _________14
LANDING ZONE (cyl) _______________________AUTO PARK
IBM AT DRIVE TYPE ________________________0 or NONE

Physical:
Height (inches/mm): 1.63/41.4
Width (inches/mm): 4.00/101.6
Depth (inches/mm): 5.97/151.6
Weight (lbs/kg): 2.3/1.04

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. (08/26/94)