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 1991
ST-138 ST412 MFM
/��Ŀ
� O �12
� O �G
� O �G
� O �5
�Data Cable �Controller Cable 1 \����
��������� �� �������������������� ��� ������������
1 o o o o o o o �������������1
o o o o o o o o ��������������
� � � � 4 3 2 1 � Resistor Termination Pack
� � � � �������
� � � � �
� � � � ����� Drive Selects
� � � ���������� Factory Test
� � ������������ Write Fault
� �������������� Not Used
���������������� Radial
Note: Some configurations have the drive select jumper block oriented
perpendicular to the back of the drive. In this configuration,
pin-1 (radial select) is closest to the front faceplate of the
drive.
ST - 138
UNFORMATTED CAPACITY (MB) ________________38.4
FORMATTED CAPACITY (17 SECTORS) (MB) _____32.1
ACTUATOR TYPE ____________________________STEPPER
TRACKS ___________________________________3,690
CYLINDERS ________________________________615
HEADS ____________________________________6
DISCS ____________________________________3
MEDIA TYPE _______________________________THIN FILM
RECORDING METHOD _________________________MFM
TRANSFER RATE (mbits/sec) ________________5.0
SPINDLE SPEED (RPM) ______________________3,600
AVERAGE LATENCY (mSEC) ___________________8.3
INTERFACE ________________________________ST412
SECTORS PER DRIVE ________________________62,730
TPI (TRACKS PER INCH) ____________________824
BPI (BITS PER INCH) ______________________14,953
AVERAGE ACCESS (ms)*______________________40/28
SINGLE TRACK SEEK (ms) ___________________8
MAX FULL SEEK (ms) _______________________70
MTBF (power-on hours) ____________________150,000
POWER REQUIREMENTS: +12V START-UP (amps) _2.0
+12V TYPICAL (amps) __0.35
+5V TYPICAL (amps) ___0.8
TYPICAL (watts) ______8
MAXIMUM (watts) ______28
BUFFERED STEP PULSE RATE (micro sec) _____3-200
WRITE PRECOMP (cyl) ______________________N/A (616)
REDUCED WRITE CURRENT (cyl) ______________N/A (616)
LANDING ZONE (cyl)________________________AUTO PARK
IBM AT DRIVE TYPE ________________________3
*ST138-0/ST138-1
Seagate reserves the right to change, without notice, product
offerings or specifications. (6/26/90)