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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� Germany +49 89 140-9331 � Singapore +65 227-2217 �
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(C)opyright 1993
ST-9235NG
�� 40-pin I/O Connector (* see below)
TOP �
� 1
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pin-17 removed for keying �����������������
Pin assignments for the Seagate 2.5" drive SCSI interface connector
(signal) (pin) (signal)
����������Ŀ pin
Reserved (NC) � 1 2 � Reserved (ND) ID1 ID2 ID4
Reserved (NC) � 3 4 � Reserved (ND) ID ������������
ID1- � 5 6 � ID2- 0 � H H H
ID4- � 7 8 � LED 1 � L H H
������������ 2 � H L H
����������Ŀ 3 � L L H
+5v � 1 2 � +5v 4 � H H L
+5v Ret � 3 4 � +5v Ret 5 � L H L
Ground � 5 6 � DB0- 6 � H L L
Ground � 7 8 � DB1- 7 � L L L
Ground � 9 10� DB2-
Ground � 11 12� DB3- H = high
Ground � 13 14� DB4- L = low
Ground � 15 16� DB5-
Connector Key � nopin 18� DB6-
Ground � 19 20� DB7-
Ground � 21 22� Parity-
Ground � 23 24� TRMPWR
ATN- � 25 26� BSY-
Ground � 27 28� ACK-
RST- � 29 30� MSG-
Ground � 31 32� SEL-
I/O- � 33 34� C/D-
Ground � 35 36� REQ-
+5v Ret � 37 38� +5v Ret
+5v � 39 40� +5v
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ST-9235N
UNFORMATTED CAPACITY _____________________
FORMATTED CAPACITY (xx SECTORS) __________209.8
ACTUATOR TYPE ____________________________ROTARY VOICE COIL
TRACKS ___________________________________
LOGICAL CYLINDERS ________________________985
LOGICAL HEADS ____________________________13
LOGICAL SECTORS PER TRACK ________________32
HEADS ____________________________________6
DISCS (2.5 in) ___________________________3
MEDIA TYPE _______________________________THIN FILM
HEAD TYPE ________________________________THIN FILM
RECORDING METHOD _________________________ZBR RLL (2,7)
INTERNAL TRANSFER RATE (mbits/sec) _______up to 16
SPINDLE SPEED (RPM) ______________________3,449
AVERAGE LATENCY (mSEC) ___________________8.69
BUFFER ___________________________________128 Kbyte
INTERFACE ________________________________SCSI
BYTES PER TRACK __________________________
SECTORS PER DRIVE ________________________409,760
TPI (TRACKS PER INCH) ____________________2,750
BPI (BITS PER INCH) ______________________45,500
FCI (FLUX DENSITY) _______________________30,300
AVERAGE ACCESS (ms) ______________________16
SINGLE TRACK SEEK (ms) ___________________5
MAX FULL SEEK (ms) _______________________27
MTBF (power-on hours) Office _____________150,000
SHOCK (G's) operating/nonoperating _______10/150
NG model with 'SafeRite' ______________100/150
POWER REQUIREMENTS: +5V START-UP (amps) __1.3
POWER MANAGEMENT (Watts):
ACTIVE _______________2.5
STANDBY ______________1.8
SHUTDOWN _____________1.08
WRITE PRECOMP (cyl) ______________________N/A
REDUCED WRITE CURRENT (cyl) ______________N/A
LANDING ZONE (cyl) _______________________AUTO
IBM AT DRIVE TYPE ________________________0
