12
Barracuda 9 Installation Guide, Rev. A
Characteristics
ST19171
Interface
UltraSCSI
1
Capacity
Unformatted
11.7 Gbytes
Formatted
2
9.1 Gbytes
Recording
Cylinders (user)
5,273
Read/write data heads
20
Servo heads
Embedded
Seek time
3
Average read
9.0 msec
Average write
10.5 msec
Disc rotation
RPM
7,200
Average latency
4.17 msec
Internal transfer rate
80 to 124
(Mbits/sec, variable with zone)
Max sync. SCSI transfer rate
N
20 Mbytes/sec
W/WD/WC/DC
40 Mbytes/sec
Multi-segmented cache
512 Kbytes
2,048 Kbytes (optional)
1
Can also be operated according to SCSI-1 and SCSI-2 proto-
cols.
2
Standard factory units are formatted as follows:
512 data bytes per sector
9 spare sectors per cylinder
1 cylinder at the inner track reserved for spares
3
Not including on-board controller overhead.
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