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SEAGATE TECHNOLOGY, INC.Customer Technical Support FAX Network
+1 408 438-8137
Customer Technical Support Bulletin Boards (300-9600, 8-N-1)
United States +1 408 438-8771 United Kingdom +44 628 478011
Germany +49 89 140-9331 Singapore +65 227-2217
(C)opyright 1991
ST-3500A AT Interface
J5 Drive ID Select and J6 (located on side Configuration Select
Header near rear)
o o o1
+5v ---o o o40-pin I/O Cable Connector
o o o o o1 1 2 3J1 :::::::::: ::::::::1 / \ o o o o o Remote LED
4Reserved
0 0 0 0 Connection Jumper (pin 20 missing for 5 G G 12 (see
below) Position keying purposes) DC Power
J5
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)
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.
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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 ofthe
synchronized spindle reference signal (pin 3) andground (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 Bnot used
if jumper H is on. (This jumper is mutuallyexclusive 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 a147
ohm resistor. Pin 5 is the LED driver.
2 Reserved jumper position.
3 Reserved jumper position.
ST-3500A
UNFORMATTED CAPACITY (MB) ________________502FORMATTED CAPACITY
(xx SECTORS) (MB) _____426ACTUATOR TYPE
____________________________VOICE COILTRACKS
___________________________________10,829CYLINDERS
__PHYSICAL______________________1,547 (user)HEADS
______PHYSICAL______________________7DISCS (3.5 in)
___________________________4MEDIA TYPE
_______________________________THIN FILMRECORDING METHOD
_________________________ZBR RLL (1,7)TRANSFER RATE INTERNAL
(mbits/sec)________21.6 to 36SPINDLE SPEED (RPM)
______________________4,535AVERAGE LATENCY (mSEC)
___________________6.61
BUFFER ___________________________________256 KByte
SeaCachePrefetch, Multi-SegmentedINTERFACE
________________________________AT BUSSECTORS PER DRIVE
________________________TPI (TRACKS PER INCH)
____________________2150AVERAGE ACCESS (ms)
(read/write)__________9.9/10.6SINGLE TRACK SEEK (ms)
___________________2MAX FULL SEEK (ms)
_______________________21.5MTBF (power-on hours)
____________________200,000POWER REQUIREMENTS: +12V START-UP (amps)
_1.5
+12V TYPICAL (amps) __0.4
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+5V TYPICAL (amps) ___0.2TYPICAL (watts) ______5
WRITE PRECOMP (cyl) ______________________N/AREDUCED WRITE
CURRENT (cyl) ______________N/ALANDING ZONE (cyl)
_______________________AUTO PARKIBM AT DRIVE TYPE
________________________*
Physical:
Height (inches/mm): 1.00/25.4Width (inches/mm): 4.00/101.6Depth
(inches/mm): 5.75/146.1Weight (lbs/kg): 1.8/0.80
* MAY REQUIRE FORMATTING AND PARTITIONING SOFTWARE. ALSO, CHECK
TOSEE IF YOUR CMOS SETUP HAS A "CUSTOM" OR "USER DEFINABLE" DRIVE
TYPEAVAILABLE. (see below)
Possible translation: 895 cyl, 15 heads, 62 sectors =
426,163,200
Note: A "custom" or "user-definded" CMOS drivetype may ask for
anumerical value for the Write Precompensation cylinder and for
the
Landing Zone cylinder. A basic rule-of-thumb for drive models
that donot require the old Write Precomp technique or a Landing
Zone becausethey are Auto-Parking is to add 1 to the cylinder value
being used. Asan example: If cylinders equaled 820, then both Write
Precomp andLanding Zone would be entered as 821. Some BIOS will
convert this to65535 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, itis 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,
productofferings or specifications. (10/12/92)#
