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ST42000N.TXT
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1994-02-11
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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-42000N Elite 2 Fast SCSI-2
⁄ƒ This T-RES only on Differential model
≥ (see below for T-RES descriptions)
Spindle Sync ø ≥ ⁄ƒ Terminator Power Source (see below)ƒƒø
⁄4ƒƒ1ƒƒø ⁄ƒƒ*ƒƒƒ1 4o≥o3 ⁄ƒƒƒƒƒƒ1 ≥
p≥o oo A ¿ƒ≥ƒƒƒƒŸ 2o o1 ¿ƒƒ≥ƒƒƒŸ ≥
o o o o o n≥o oo B ¿Terminator DIPSŸ Power o o o o ≥
o o o o o ¿ƒƒƒƒƒƒŸ’ÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕ∏ ⁄12ƒGƒGƒ5ƒø o o o o ≥
ÕÿÕÿÕÿÕÿÕÿÕÕPÕWÕAÕÕÕµ::::::::::::::::::::::::1ΔÕÕµ 0 0 0 0 ΔÕÿÕÿÕÿÕÿÕÕ ≥
4 2 1 ≥ ≥ ‘ÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕæ \ƒƒƒƒƒƒƒƒƒ/ ≥ ≥ ≥ ≥ ≥
ƒƒ¬ƒƒ ≥ ≥ SCSI Cable Connector ≥ ≥ ≥ ≥ ≥
≥ ≥ ≥ ≥ ≥ ≥ ≥ ≥
≥ ≥ ¿ƒƒ Master off/Slave on - Spindle Sync ≥ ≥ ≥ ≥ ≥
≥ ¿ƒƒƒƒ Write Protect option enable ≥ ≥ ≥ ≥ ≥
¿ƒƒƒƒƒƒƒƒ SCSI ID ≥ ≥ ≥ ≥ ≥
Spinup Delay (10 secs * ID) ƒŸ ≥ ≥ ≥ ≥
Motor Start option enable ƒƒƒŸ ≥ ≥ ≥
Parity check DISable ƒƒƒƒƒŸ ≥ ≥
Sweep Cycle enable ƒƒƒƒƒƒƒŸ ≥
≥
’ÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕ∏ ≥
≥ Terminator Power Source Options √ƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒŸ
√ƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒ¡ƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒø
≥ 2 & 4 ƒ Initiator supplies power over the SCSI Bus for terminators. ≥
≥ Drive supplies no terminator power. ≥
≥ 1 & 2 ƒ Drive supplies power for its own terminator resistor-paks ≥
≥ but not to SCSI Bus. This is the factory setting. ≥
≥ 1 & 3 ≥
≥ AND ƒ Drive supplies power fpr external terminator at end of the ≥
≥ 2 & 4 daisy chain. Terminator resistor-paks must be removed. ≥
≥ This option is recommended only for last drive on daisy ≥
≥ chain. ≥
¿ƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒŸ
T-RES descriptions: ST42000N 2 SIPs
ST42000ND 2 DIPs
ST-42000N
Elite 2
UNFORMATTED CAPACITY _____________________2,106,263,040
FORMATTED CAPACITY (512 byte blk) ________1,792,111,616
AVERAGE SECTORS PER TRACK ________________83
ACTUATOR TYPE ____________________________ROTARY VOICE COIL
TRACKS ___________________________________41,984
CYLINDERS ________________________________2,627/2,624 (user)
HEADS ____________________________________16
DISCS (5.25 in) __________________________9
MEDIA TYPE _______________________________THIN FILM
HEAD TYPE ________________________________THIN FILM
RECORDING METHOD _________________________ZBR RLL (2,7)
INTERNAL TRANSFER RATE (mbits/sec) _______30-40
EXTERNAL TRANSFER RATE (mbyte/sec) _______10 (burst)
SPINDLE SPEED (RPM) ______________________5,400
AVERAGE LATENCY (mSEC) ___________________5.55
COMMAND OVERHEAD (mSEC) __________________<0.5
BUFFER ___________________________________256 Kbyte
Read Look-Ahead, Adaptive, Multi-Segmented
Cache
INTERFACE ________________________________SCSI-2 FAST
BYTES PER TRACK __________________________42,000-55,440
SECTORS PER DRIVE ________________________3,500,218
BYTES PER CYLINDER _______________________672,000-887,040
TPI (TRACKS PER INCH) ____________________2,250
BPI (BITS PER INCH) ______________________41,713
AVERAGE ACCESS (ms) ______________________11
SINGLE TRACK SEEK (ms) ___________________1.7
MAX FULL SEEK (ms) _______________________22.5
MTBF (power-on hours) Class A Room _______250,000
MTBF (power-on hours) Office _____________150,000
POWER REQUIREMENTS: Single ended/Differential
+12V START-UP (amps) _4.6/4.6
+12V TYPICAL (amps) __2.0/2.0
+5V START-UP (amps) __2.3/2.6
+5V TYPICAL (amps) ___2.3/2.6
TYPICAL (watts) ______29.9/31.8
MAXIMUM (watts) ______33.7/36.6
WRITE PRECOMP (cyl) ______________________N/A
REDUCED WRITE CURRENT (cyl) ______________N/A
LANDING ZONE (cyl) _______________________Auto
USER MANUAL PART NUMBER __________________
OTHER ____________________________________
Synchronized Spindles, Sweep Cycle Capability
ZBR = Zone Bit Recording = Variable sectors per track
** Already low-level formatted at the factory with six spare sectors
per cylinder, one spare cylinders/unit, one system cylinder/unit, and
one diagnostic cylinder/unit.
Physical:
Height (inches/mm): 3.25/82.6
Width (inches/mm): 5.75/146.1
Depth (inches/mm): 8.0/203
Weight (lbs/kg): 7.8/3.6
Seagate reserves the right to change, without notice, product
offerings or specifications. (12/14/92)