AOH :: ST225R.TXT
Seagate ST225R RLL Hard Disk Specs
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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)
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� United States +1 408 438-8771 � United Kingdom +44 628 478011 �
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(C)opyright 1991
ST-225R 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
� � � � � � � � 旼컴컴컴컴컴�1
� � � � � � � � 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 - 225R
UNFORMATTED CAPACITY (MB) ________________25.0
FORMATTED CAPACITY (31 SECTORS) (MB) _____21.2
ACTUATOR TYPE ____________________________STEPPER
TRACKS ___________________________________1,334
CYLINDERS ________________________________667
HEADS ____________________________________2
DISCS ____________________________________1
MEDIA TYPE _______________________________THIN FILM
RECORDING METHOD _________________________RLL
TRANSFER RATE (mbits/sec) ________________7.5
SPINDLE SPEED (RPM) ______________________3,000
INTERFACE ________________________________ST412
TPI (TRACKS PER INCH) ____________________588
BPI (BITS PER INCH) ______________________18,897
AVERAGE ACCESS (ms) ______________________70
SINGLE TRACK SEEK (ms) ___________________20
MTBF (power-on hours) ____________________100,000
POWER REQUIREMENTS: +12V START-UP (amps) _2.4
+12V TYPICAL (amps) __0.9
+5V TYPICAL (amps) ___0.8
TYPICAL (watts) ______14.8
MAXIMUM (watts) ______33
BUFFERED STEP PULSE RATE (micro sec) _____5-200
WRITE PRECOMP (cyl) ______________________N/A (668)
REDUCED WRITE CURRENT (cyl) ______________N/A (668)
LANDING ZONE (cyl)________________________670
IBM AT DRIVE TYPE ________________________*
*MUST BE USED WITH THE ST11R CONTROLLER OR
16-BIT CONTROLLER
* 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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