SEAGATE TECHNOLOGY, INC.
Customer Technical Support FAX Network +1 408 438-8137
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� United States +1 408 438-8771 � United Kingdom +44 628 478011 �
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(C)opyright 1991
ST-3500A AT Interface
J5 Drive ID Select and � � J6 (located on side
Configuration Select Header� � near rear)
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� o o o1
� +5v ---o o o
40-pin I/O Cable Connector � ��������
�������������������� o o o o o1 1 2 3
J1�::::::::::�::::::::1� /���������\ o o o o o Remote LED�� � ��Reserved
�����������������������ͳ 0 0 0 0 ������������ Connection� ��ĴJumper
(pin 20 missing for ��5�G�G�12� (see below)Ŀ �Position
keying purposes) DC Power ����������
�
��J5����������������������������Ŀ
� �Ŀ �Ŀ �Ŀ 1 �
� �o� o-C�o�E�o�G-o �
� �o�B-o �o� �o� o �
� �A� �D� �F� H �
� �������������������������� �
���Defaults shown in solid lines���
J5 Jumper Funtion Description (* indicates default)
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A B (A=vertical, pins 9 & 10; B=horizontal, pins 8 & 10)
OFF OFF Drive is the slave (Drive 1).
OFF ON Drive is the master (Drive 0) with slave (Drive 1) present.
ON* OFF Drive s the master (Drive 0).
C (C=horizontal, pins 5 & 7)
ON Slave (Drive 1) Present is connected to J1 pin 39. Jumpers
"D" or "E" cannot be installed if jumper "C" is installed.
D (D=vertical, pins 5 & 6)
ON* DASP- is connected to J1 pin 39. Jumpers "C", "D", "F", or
"G" cannot be installed if jumper "E" is installed.
OFF REFSIG is not connected to J1 pin 39.
E (E=horizontal, pins 3 & 5)
ON REFSIG is connected to J1 pin 39. Jumpers "C", "D", "F",
or "G" cannot be installed if jumper "E" is installed.
OFF REFSIG is not connected to J1 pin 39.
F (F=vertical, pins 3 & 4)
ON* No external reference for REFSIG. Jumpers "E", "G", or "H"
cannot be installed if jumper "F" is installed.
OFF This location provides a port for external connection of
the synchronized spindle reference signal (pin 3) and
ground (pin 4).
G (G=horizontal, pins 1 & 3)
ON REFSIG is connected to J1 pin 28. Jumpers "E" or "F" cannot
be installed if jumper "G" is installed.
OFF REFSIG is not connected to J1 pin 28.
H (H=vertical, pins 1 & 2)
ON Drive implements "CSEL" (Cable Select line in I/O connector)
feature. Implementation not defined yet. Jumpers A and B
not used if jumper H is on. (This jumper is mutually
exclusive with jumper "G").
OFF* Drive select is based on use of jumper A or B.
J6 Jumper Funtion Description (2x3 jumper block)
-------------------------------------------------
1 Remote LED connection. Pin 6 is connected to +5v through a
147 ohm resistor. Pin 5 is the LED driver.
2 Reserved jumper position.
3 Reserved jumper position.
ST-3500A
UNFORMATTED CAPACITY (MB) ________________502
FORMATTED CAPACITY (xx SECTORS) (MB) _____426
ACTUATOR TYPE ____________________________VOICE COIL
TRACKS ___________________________________10,829
CYLINDERS __PHYSICAL______________________1,547 (user)
HEADS ______PHYSICAL______________________7
DISCS (3.5 in) ___________________________4
MEDIA TYPE _______________________________THIN FILM
RECORDING METHOD _________________________ZBR RLL (1,7)
TRANSFER RATE INTERNAL (mbits/sec)________21.6 to 36
SPINDLE SPEED (RPM) ______________________4,535
AVERAGE LATENCY (mSEC) ___________________6.61
BUFFER ___________________________________256 KByte SeaCache
Prefetch, Multi-Segmented
INTERFACE ________________________________AT BUS
SECTORS PER DRIVE ________________________
TPI (TRACKS PER INCH) ____________________2150
AVERAGE ACCESS (ms) (read/write)__________9.9/10.6
SINGLE TRACK SEEK (ms) ___________________2
MAX FULL SEEK (ms) _______________________21.5
MTBF (power-on hours) ____________________200,000
POWER REQUIREMENTS: +12V START-UP (amps) _1.5
+12V TYPICAL (amps) __0.4
+5V TYPICAL (amps) ___0.2
TYPICAL (watts) ______5
WRITE PRECOMP (cyl) ______________________N/A
REDUCED WRITE CURRENT (cyl) ______________N/A
LANDING ZONE (cyl) _______________________AUTO PARK
IBM AT DRIVE TYPE ________________________*
* MAY REQUIRE FORMATTING AND PARTITIONING SOFTWARE. ALSO, CHECK TO
SEE IF YOUR CMOS SETUP HAS A "CUSTOM" OR "USER DEFINABLE" DRIVE TYPE
AVAILABLE. (see below)
Possible translation: 895 cyl, 15 heads, 62 sectors = 426,163,200
Note: A "custom" or "user-definded" CMOS drivetype may ask for a
numerical value for the Write Precompensation cylinder and for the
Landing Zone cylinder. A basic rule-of-thumb for drive models that do
not require the old Write Precomp technique or a Landing Zone because
they are Auto-Parking is to add 1 to the cylinder value being used. As
an example: If cylinders equaled 820, then both Write Precomp and
Landing Zone would be entered as 821. Some BIOS will convert this to
65535 or -1, which are functionally equivalent to "none (not used)".
PHYSICAL/LOGICAL equivalent to NATIVE/TRANSLATION
Already low-level formatted at the factory.
Since a User-definable or Custom translation geometry may be used, it
is imperative that the values be written down and kept with your
permanent records for retrieval in the event of CMOS battery failure.
Seagate reserves the right to change, without notice, product
offerings or specifications. (10/12/92)
