16
Barracuda 18LP Installation Guide, Rev. B
Table 1.
Drive characteristics
Interface
UltraSCSI [1]
Capacity
Formatted [2]
Max. data blocks [2]
ST39175
9.1 Gbyte [2]
10F59C7h [2]
ST318275
18.2 Gbyte [2]
21EB38Fh [2]
Recording
Cylinders (user)
11,721
Read/write data heads
ST39175
5
ST318275
10
Access time [3]
Average read
6.9 msec
Average write
7.7 msec
Disk rotation
RPM
7,200 r/min
Average latency
4.17 msec
Internal transfer rate (variable with zone)
ST39175
137–240 Mbits/sec
ST318275
137–240 Mbits/sec
Maximum synchronous SCSI transfer rate
LW/LC
80 Mbytes/sec
[1] Operated according to SCSI-2 and SCSI-3 protocols. Referred to
also as “SCSI Fast-20” and “Fast-40.”
[2] Read data capacity. Add one for total capacity. Standard factory
units are formatted 512 data bytes per sector with spare tracks
reserved for reallocating bad sectors.
[3] Includes controller overhead.
