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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(C)opyright 1991
ST-2274A (94244-274) Wren 6 HH AT (IDE)
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o o o o o o o 5 G G 12
G F E D C B A
A B
0 0 Factory use only
0 1 Drive is Slave, motor start delay 20 sec from master start-up
1 0 Drive is Slave, no motor start delay
1 1 Drive is Master, motor starts at application of DC power
C D
0 0 Physical mode
0 1 Translate (logical) mode, sparing scheme is one sector
1 0 Translate (logical) mode, no sparing space allocated
1 1 Factory use only
E
0 Slave present, only meaningful on master
1 No Slave present
F G
x x Factory test, position G may or may not be present by PWA
ST-2274A
94244-274 WREN 6 HH
UNFORMATTED CAPACITY (MB) ________________274
FORMATTED CAPACITY (54 SECTORS) (MB) _____241
ACTUATOR TYPE ____________________________VOICE COIL
TRACKS ___________________________________8735
CYLINDERS ________________________________1747
HEADS ____________________________________5
DISCS ____________________________________3
MEDIA TYPE _______________________________THIN FILM
RECORDING METHOD _________________________RLL (2,7)
TRANSFER RATE (mbytes/sec) _______________1.875
SPINDLE SPEED (RPM) ______________________3,600
AVERAGE LATENCY (mSEC) ___________________8.33
BUFFER ___________________________________32 Kbyte
Read Look-Ahead, Non-Adaptive,
Single-Segmented Buffer
INTERFACE ________________________________AT
TPI (TRACKS PER INCH) ____________________1459
BPI (BITS PER INCH) ______________________31699
AVERAGE ACCESS (ms) ______________________16
SINGLE TRACK SEEK (ms) ___________________3
MAX FULL SEEK (ms) _______________________33
MTBF (power-on hours) ____________________100,000
POWER REQUIREMENTS: +12V START-UP (amps) _4.5
+12V TYPICAL (amps) __0.95
+5V START-UP (amps) __1.0
+5V TYPICAL (amps) ___0.75
TYPICAL (watts) ______15
MAXIMUM (watts) ______59
BUFFERED STEP PULSE RATE (micro sec) _____
WRITE PRECOMP (cyl) ______________________N/A
REDUCED WRITE CURRENT (cyl) ______________N/A
LANDING ZONE (cyl) _______________________AUTO PARK
IBM AT DRIVE TYPE ________________________*
* MAY REQUIRE FORMATTING AND PARTITIONING SOFTWARE. ALSO, CHECK TO
SEE IF YOUR CMOS SETUP HAS A "CUSTOM" OR "USER DEFINABLE" DRIVE TYPE
AVAILABLE.
Possible Translation: 873 cyls, 10 heads, 54 sectors = 241,367,040
Possible Translation: 536 cyls, 16 heads, 55 sectors = 241,500,160
Possible translation: 873 cyl, 15 heads, 36 sectors = 241,367,040
Note: A "custom" or "user-definded" CMOS drivetype may ask for a
numerical value for the Write Precompensation cylinder and for the
Landing Zone cylinder. A basic rule-of-thumb for drive models that do
not require the old Write Precomp technique or a Landing Zone because
they are Auto-Parking is to add 1 to the cylinder value being used. As
an example: If cylinders equaled 820, then both Write Precomp and
Landing Zone would be entered as 821. Some BIOS will convert this to
65535 or -1, which are functionally equivalent to "none (not used)".
PHYSICAL/LOGICAL equivalent to NATIVE/TRANSLATION
WARNING - Already low-level formatted at the factory.
Since a User-definable or Custom translation geometry may be used, it
is imperative that the values be written down and kept with your
permanent records for retrieval in the event of CMOS battery failure.
Seagate reserves the right to change, without notice, product
offerings or specifications. (6/26/90)
