AOH :: ST277R.TXT
Seagate ST277R RLL Hard Disk Specs
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SEAGATE TECHNOLOGY, INC.
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(C)opyright 1991
ST-277R ST412 RLL
/�4�3�2�1�\
� O O O O � Power
o o o o o o o o 읕컴컴컴컴�
�Data Cable o o o o o o o o �Controller Cable 1 5 G G 12
袴袴袴袴� 袴 � � � � � � � � 袴袴袴袴袴袴袴袴袴袴 袴� 袴袴袴袴袴袴
� � � � � � � � 1컴컴컴컴컴컴�
� � � � � � � � 읕Terminator켸
� � � � � � � �
Drive Select->1 2 3 4 � � � � Radial
� � � � � 읕� Reserved
� 읓� � 읕컴� Write Fault
� � 읕컴컴� Factory Test
� 읕컴컴컴컴 Never Used (Drive Select 3 and 4)
� If twisted cable, use Drive Select 2
ST - 277R
UNFORMATTED CAPACITY (MB) ________________76.9
FORMATTED CAPACITY (26 SECTORS) (MB) _____65.5
ACTUATOR TYPE ____________________________STEPPER
TRACKS ___________________________________4,920
CYLINDERS ________________________________820
HEADS ____________________________________6
DISCS ____________________________________3
MEDIA TYPE _______________________________THIN FILM
RECORDING METHOD _________________________RLL (2,7)
TRANSFER RATE (mbits/sec) ________________7.5
SPINDLE SPEED (RPM) ______________________3,600
AVERAGE LATENCY (mSEC) ___________________8.3
INTERFACE ________________________________ST412
SECTORS PER DRIVE ________________________127,920
TPI (TRACKS PER INCH) ____________________777
BPI (BITS PER INCH) ______________________14,902
AVERAGE ACCESS (ms)*______________________40/28
SINGLE TRACK SEEK (ms) ___________________8
MAX FULL SEEK (ms) _______________________ /70
MTBF (power-on hours) ____________________70,000
POWER REQUIREMENTS: +12V START-UP (amps) _2.0/2.5*
+12V TYPICAL (amps) __0.5
+5V TYPICAL (amps) ___1.0/1.2*
TYPICAL (watts) ______11/12*
MAXIMUM (watts) ______29/36*
BUFFERED STEP PULSE RATE (micro sec) _____3-200
WRITE PRECOMP (cyl) ______________________N/A (821)
REDUCED WRITE CURRENT (cyl) ______________N/A (821)
LANDING ZONE (cyl)________________________AUTO PARK
IBM AT DRIVE TYPE _______________________**
*ST277R-0/ST277R-1
* MAY REQUIRE A CONTROLLER WITH BIOS SUPPORT, OR FORMATTING
AND PARTITIONING SOFTWARE. ALSO, CHECK TO SEE IF YOUR CMOS SETUP
HAS A "CUSTOM" OR "USER DEFINABLE" DRIVE TYPE AVAILABLE.
Seagate reserves the right to change, without notice, product
offerings or specifications. (6/26/90)
^Z
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