Terminator to the SCSI bus on pin 26. �ķ *
����
���
Terminator power to the SCSI bus and ���ķ*
drive. �����
����
* Valid for single ended drives only.
Note: ST-12450WD (differential model) does not come with any
provision to use Termination resistors. Therefore, SCSI bus
needs to be externally terminated.
ST-12450W
UNFORMATTED CAPACITY (MB) ________________2437
FORMATTED CAPACITY (xx SECTORS) (MB) _____1849
Standard OEM model formatted to 512
bytes/block
AVERAGE SECTORS PER TRACK ________________149 rounded down
ACTUATOR TYPE ____________________________ROTARY VOICE COIL
TRACKS ___________________________________48,726
CYLINDERS ________________________________2,710 user
HEADS ______PHYSICAL/LOGICAL______________18/9
DISCS (3.5 in) ___________________________10
MEDIA TYPE _______________________________THIN FILM
RECORDING METHOD _________________________ZBR RLL (1,7)
INTERNAL TRANSFER RATE (mbits/sec):
Per Logical Head _______________________68.6 to 113.0
Per Physical Head ______________________34.3 to 56.5
EXTERNAL TRANSFER RATE (mbyte/sec) _______20 Sync
SPINDLE SPEED (RPM) ______________________7,200
AVERAGE LATENCY (mSEC) ___________________4.17
BUFFER ___________________________________1024 KByte
Read Look-Ahead, Adaptive,
Multi-Segmented Cache
INTERFACE ________________________________SCSI-2 FAST WIDE
BYTES PER TRACK __________________________99,536 average
SECTORS PER DRIVE ________________________3,957,500
TPI (TRACKS PER INCH) ____________________3,047
BPI (BITS PER INCH) ______________________52,187
AVERAGE ACCESS (ms) (read/write)__________8.0/9.0
Drive level without controller overhead
SINGLE TRACK SEEK (ms) ___________________0.6/0.9
MAX FULL SEEK (ms) _______________________17/19
MTBF (power-on hours) ____________________500,000
SHOCK (G's):
operating (Read/Write) __________2
nonoperating ____________________50
ACOUSTICS (typ/max dBA) __________________4.7/
POWER REQUIREMENTS: +12V START-UP (amps) _2.18
+12V TYPICAL (amps) __0.83 idle
+5V START-UP (amps) __1.0
+5V TYPICAL (amps) ___0.76 idle
IDLE (watts) _________13.5
LANDING ZONE (cyl) _______________________AUTO PARK
IBM AT DRIVE TYPE ________________________0 or NONE