Cheetah 18 Installation Guide, Rev . A 17
Characteristics ST11820 2LW/LC
Interface Ultra2 SCSI1
Capacity
Unformatted (Gbytes)
Formatted (Gbytes)222.5 4
18.21
Recording
Cylinders (user)
Read/write data heads
Avg bytes/track
6,962
24
104,840-159,008
Access time3
Average read (msec)
Average write (msec) 5.9
6.7
Disc rotation
RPM
Average latency (msec) 10,025
2.99
Synchronous data tr ansfer rate
Maximum instantane ous (Mbytes/sec) 40 (SE mode)
80 (LVD mode)
Asynchronous data transfer rate
Maximum instantaneous (2 bytes wide)
(Mbytes/sec) 10.0
Multi-segmented cache ( kbytes) 1,024 standard
4,096 optional
1. Also operates per SCSI-1/SCSI-2/SCSI-3 protocols.
2. The specified formatted capacities are calculated with the standard
OEM sector size (512 bytes per logical block) and sparing.
3. Includes on-board controller overhead.