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ST277N.TXT
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1991-10-31
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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)
⁄ƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒ¬ƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒø
≥ United States +1 408 438-8771 ≥ United Kingdom +44 628 478011 ≥
√ƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒ≈ƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒ¥
≥ Germany +49 89 140-9331 ≥ Singapore +65 227-2217 ≥
¿ƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒ¡ƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒŸ
(C)opyright 1991
ST-277N SCSI
5 G G 12
⁄SCSI Cable /ƒ4ƒ3ƒ2ƒ1ƒ\
o o o (o) o ⁄...≥.....................ø ≥ O O O O ≥ Power
o o o (o) o ........................1 ¿ƒƒƒƒƒƒƒƒƒŸ
ÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕ—ÕÕÕÕ—ÕÕÕ—ÕÕÕÕ—ÕÕ—ÕÕÕÕ—ÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕ
1 2 4 ≥ P 1ƒƒƒƒŸ 1ƒƒƒƒŸ 1ƒƒƒƒŸ Terminating Resistors
ƒƒ¬ƒƒ ≥ ¿ƒ Parity Check enable
≥ ¿ƒƒƒƒ Some PWA's have an extra jumper here
¿ƒƒƒƒƒƒƒƒƒ ID Selects, ID 0 (none) for single drive system
ST - 277N
UNFORMATTED CAPACITY (MB) ________________77
FORMATTED CAPACITY (26/34* SECTORS) (MB) _64.9
ACTUATOR TYPE ____________________________STEPPER
TRACKS ___________________________________4,920/3,768*
CYLINDERS ________________________________820/628*
HEADS ____________________________________6
DISCS ____________________________________3
MEDIA TYPE _______________________________THIN FILM
RECORDING METHOD _________________________RLL (2,7)
TRANSFER RATE (mbits/sec) ________________7.5/10*
SPINDLE SPEED (RPM) ______________________3,600
AVERAGE LATENCY (mSEC) ___________________8.3
INTERFACE ________________________________SCSI
SECTORS PER DRIVE ________________________126,875
TPI (TRACKS PER INCH) ____________________777
BPI (BITS PER INCH) ______________________14,902/19,869*
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) ___1.2/1.4*
TYPICAL (watts) ______12/13*
MAXIMUM (watts) ______30/37*
BUFFERED STEP PULSE RATE (micro sec) _____3-200
WRITE PRECOMP (cyl) ______________________N/A (821/629*)
REDUCED WRITE CURRENT (cyl) ______________N/A (821/629*)
LANDING ZONE (cyl)________________________AUTO PARK
IBM AT DRIVE TYPE ________________________0 or NONE
*ST277N-0/ST277N-1
Seagate reserves the right to change, without notice, product
offerings or specifications. (6/26/90)