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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(C)opyright 1991
ST-9051A
�� 44-pin I/O Connector (* see below)
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::::::::::::�::::::::1 o o
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pin-20 removed for keying ���������������� � �
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Drive is Master, no Slave drive present ������������������ 0 0
Drive is Master, Seagate Slave drive present ������������� 1 0
Drive is Slave to another ST9051A/ST9077A Master ��������� 0 1
Reserved Position (Do Not Use) ��������������������������� 1 1
* Drive uses +5vdc power supplied to the drive
via the interface connector. The drive does
NOT make use of a +12vdc power line.
pin-41 +5vdc (Logic)
pin-42 +5vdc (Motor)
pin-43 Ground
pin-44 Reserved
ST-9051A
UNFORMATTED CAPACITY (MB) ________________N/A
FORMATTED CAPACITY (32 SECTORS) (MB) _____42.8
ACTUATOR TYPE ____________________________VOICE COIL
TRACKS ___________________________________2,616
CYLINDERS __PHYSICAL______________________654
HEADS ______PHYSICAL______________________4
DISCS (2.5 in) ___________________________2
MEDIA TYPE _______________________________THIN FILM
RECORDING METHOD _________________________RLL (2,7)
TRANSFER RATE INTERNAL (mbytes/sec)_______1.25
SPINDLE SPEED (RPM) ______________________3,631
AVERAGE LATENCY (mSEC) ___________________8.26
BUFFER ___________________________________32 KByte SeaCache
INTERFACE ________________________________AT BUS
SECTORS PER DRIVE ________________________83,712
TPI (TRACKS PER INCH) ____________________1,750
BPI (BITS PER INCH) ______________________34,007
AVERAGE ACCESS (ms) ______________________<19
SINGLE TRACK SEEK (ms) ___________________6
MAX FULL SEEK (ms) _______________________36
MTBF (power-on hours) ____________________150,000
POWER REQUIREMENTS: +5V START-UP (amps) __1.0
POWER MANAGEMENT (Watts):
ACTIVE _______________1.7
IDLE _________________0.8
STANDBY ______________0.3
SLEEP ________________0.3
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: 820 cyl, 6 heads, 17 sectors = 42,823,680
Possible translation: 654 cyl, 4 heads, 32 sectors = 42,860,544
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. (9/25/91)
