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USA BESTSELLER Vol 1-95 (Hepp-Computer)(1995).iso
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e177
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st225.txt
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1991-10-30
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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)
┌──────────────────────────────────┬─────────────────────────────────┐
│ United States +1 408 438-8771 │ United Kingdom +44 628 478011 │
├──────────────────────────────────┼─────────────────────────────────┤
│ Germany +49 89 140-9331 │ Singapore +65 227-2217 │
└──────────────────────────────────┴─────────────────────────────────┘
(C)opyright 1991
ST-225 ST412 MFM
/─4─3─2─1─\
│ O O O O │ Power
o o o o o o o o └─────────┘
┌Data Cable o o o o o o o o ┌Controller Cable 1 5 G G 12
═════════ ══ │ │ │ │ │ │ │ │ ════════════════════ ═══ ════════════
│ │ │ │ │ │ │ │ ┌────────────1
│ │ │ │ │ │ │ │ └─Terminator─┘
│ │ │ │ │ │ │ │
Drive Select->1 2 3 4 │ │ │ └ Radial
│ │ │ │ │ └── Reserved
│ └┬┘ │ └──── Write Fault
│ │ └────── Factory Test
│ └───────── Never Used (Drive Select 3 and 4)
└ If twisted cable, use Drive Select 2
ST - 225
UNFORMATTED CAPACITY (MB) ________________25.6
FORMATTED CAPACITY (17 SECTORS) (MB) _____21.4
ACTUATOR TYPE ____________________________STEPPER
TRACKS ___________________________________2,460
CYLINDERS ________________________________615
HEADS ____________________________________4
DISCS ____________________________________2
MEDIA TYPE _______________________________OXIDE
RECORDING METHOD _________________________MFM
TRANSFER RATE (mbits/sec) ________________5.0
SPINDLE SPEED (RPM) ______________________3,600
AVERAGE LATENCY (mSEC) ___________________8.3
INTERFACE ________________________________ST412
SECTORS PER DRIVE ________________________41,820
TPI (TRACKS PER INCH) ____________________588
BPI (BITS PER INCH) ______________________9,827
AVERAGE ACCESS (ms) ______________________65
SINGLE TRACK SEEK (ms) ___________________20
MAX FULL SEEK (ms) _______________________150
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) ______________________300
REDUCED WRITE CURRENT (cyl) ______________N/A (616)
LANDING ZONE (cyl)________________________670
IBM AT DRIVE TYPE ________________________2
Seagate reserves the right to change, without notice, product
offerings or specifications. (6/26/90)