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SEAGATE TECHNOLOGY, INC.
1-800-SEAGATE
http://www.seagate.com
(C)opyright 1991
ST-4051 ST412 MFM
/Ä4Ä3Ä2Ä1Ä\
³ O O O O ³ Power
ÀÄÄÄÄÄÄÄÄÄÙ
ÚData Cable 1 5 G G 12
ÍÍÍÍÍÍÍÍÍ ÍÍ ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ ÍÍÍ ÍÍÍÍÍÍÍÍÍÍÍÍ
o o o o o o o o Ú1 ÀController Cable
o o o o o o o o ³³
Drive Select->1 2 3 4 ³ ³ ³ ³ ³ÃÄ Resistor Termination Pack
³ ³ ³ ³ ³ ³ ³ ³³
³ ÀÂÙ ³ ³ ³ ³ ÀÙ
³ ³ ³ ³ ³ ³
³ ³ ³ ³ ³ ³
³ ³ ³ ³ ³ À Radial
³ ³ ³ ³ ÀÄÄ Recovery Mode
³ ³ ³ ÀÄÄÄÄ Write Fault
³ ³ ÀÄÄÄÄÄÄ Not Connected
³ ÀÄÄÄÄÄÄÄÄÄ Never Used (Drive Select 3 and 4)
À If twisted cable, use Drive Select 2
ST - 4051
UNFORMATTED CAPACITY (MB) ________________50.88
FORMATTED CAPACITY (17 SECTORS) (MB) _____42.52
ACTUATOR TYPE ____________________________VOICE COIL
TRACKS ___________________________________4,885
CYLINDERS ________________________________977
HEADS ____________________________________5
DISCS ____________________________________3
MEDIA TYPE _______________________________THIN FILM
RECORDING METHOD _________________________MFM
TRANSFER RATE (mbits/sec) ________________5.0
SPINDLE SPEED (RPM) ______________________3,600
INTERFACE ________________________________ST412
TPI (TRACKS PER INCH) ____________________960
BPI (BITS PER INCH) ______________________9,720
AVERAGE ACCESS (ms) ______________________40
SINGLE TRACK SEEK (ms) ___________________8
MTBF (power-on hours) ____________________15,000
POWER REQUIREMENTS: +12V START-UP (amps) _4.0
+12V TYPICAL (amps) __1.5
+5V TYPICAL (amps) ___1.5
TYPICAL (watts) ______25.5
MAXIMUM (watts) ______55
BUFFERED STEP PULSE RATE (micro sec) _____10-70
WRITE PRECOMP (cyl) ______________________N/A (978)
REDUCED WRITE CURRENT (cyl) ______________N/A (978)
LANDING ZONE (cyl)________________________AUTO PARK
IBM AT DRIVE TYPE ________________________11 or 17*
* 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)
A copy of this specification file may be obtained
by FTP at
ftp://ftp.seagate.com/techsuppt/mfm/st4051.txt.
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