SEAGATE TECHNOLOGY, INC.
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(C)opyright 1993
ST-3655A (Medalist 540)
Rear View
Mini Power �� 40 pin AT Interface I/O connector
Connector �
2 ��Ŀ � (TOP) DC power
�o o� 5 G ����������� �������� /�5�G�G�12\
͵o oƵ0 0 0�͵::::::::::�::::::::1�͵ 0 0 0 0 �� ...Ŀ
1 � 12 ����������ͳ��������; ����������� �
� � (BOTTOM) �(pin 20 missing for (Factory test jumper
� � keying purposes) block located at side)
� �
OFF OFF Drive is Master (single)
OFF ON Drive is Master with Slave present (dual)
ON OFF Drive is Slave (dual)
ON ON Cable Select (requires jumper also on pins 6 and 8 of J8)
Spare jumper may be stored on pins 1 and 3.
ST-3655A
Front View ����������� Cable Select (pins 6 and 8)
� ��������� Spindle Clock to I/O pin-28 (pins 8 and 10)
� � ������� Ext. Spindle Clock Synch
J8 6-8 � (see note below)
(TOP) o o o o-o o o+
���� o � o o o o o-��������������������������
(BOTTOM) 1������� � � �
� � � ��� Remote LED
� � ����� Reserved
� ������� Clock Ground for Ext. SPSYNC
� � Reserved
���������Ĵ Reserved
� Reserved pin-3 removed for key
� Reserved
Spindle Sync note: Enable pin-28 (SPSYNC-) of the AT interface connector
by installing a jumper on pins 8 and 10 of the options
jumper block.
Connect a twisted pair to pins 9 and 10 of the options
jumper block to transmit and receive SPSYNC-.
ST-3655A
Medalist 540
UNFORMATTED CAPACITY _____________________
FORMATTED CAPACITY (xx SECTORS) __________528.4
ACTUATOR TYPE ____________________________VOICE COIL
CYLINDERS __PHYSICAL/LOGICAL______________
HEADS ______PHYSICAL/LOGICAL______________5
DISCS (3.5 in) ___________________________3
MEDIA TYPE _______________________________THIN FILM
HEAD TYPE ________________________________THIN FILM
RECORDING METHOD _________________________ZBR RLL (1,7)
INTERNAL TRANSFER RATE (mbits/sec) _______21.79 to 36.56
DMA SUPPORT ______________________________EISA Type B
SPINDLE SPEED (RPM) ______________________4,500
AVERAGE LATENCY (mSEC) ___________________6.67
BUFFER ___________________________________256 Kbyte SeaCache
Read/Write Multiple, Read Look-Ahead,
Multi-Segmented
INTERFACE ________________________________AT
SECTORS PER DRIVE ________________________1,032,192
BYTES PER CYLINDER _______________________
TPI (TRACKS PER INCH) ____________________3,000
BPI (BITS PER INCH) ______________________53,192
AVERAGE ACCESS (ms) ______________________12
SINGLE TRACK SEEK (ms) ___________________<4
MAX FULL SEEK (ms) _______________________32
MTBF (power-on hours) Office _____________250,000
POWER DISSIPATION (watts) ________________
POWER REQUIREMENTS: +12V START-UP (amps) _1.9
POWER MANAGEMENT (Watts):
ACTIVE _______________4.9
IDLE _________________2.5
STANDBY ______________0.3
WRITE PRECOMP (cyl) ______________________N/A
REDUCED WRITE CURRENT (cyl) ______________N/A
LANDING ZONE (cyl) _______________________AUTO
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: 1024 cyl, 16 heads, 63 sectors = 528,428,304
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
ZBR = Zone Bit Recording = Variable sectors per track
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. (08/09/94)
