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Drive Performance
A-6 Sixth Edition 95741
■ Drive Performance
Table A-6 shows performance characteristics of the 9840 Tape Drive.
Table A-6. Drive Performance
Characteristics Values
Maximum block size 256 kB
Data rate, head-to-tape 10 MB/s (see note)
Data rate of host interface Fibre Channel: burst transmission speed of
100 MB/s (256 kB)
Ultra SCSI: 40 MB/s burst synchronous/
ULTRA-1, differential, wide/fast, negotiable
down to SCSI-1 narrow differential (see note)
Maximum rewind time:
from end of any wrap to
logical beginning of tape
(BOT)
16 s
Reposition time No penalty
Tape load and initialize to
ready
4 s
Unload time 5 s excluding rewind
Access time (does not
include library timing)
8 s for first search
11 s average for subsequent search
Data buffer size 8 MB
Read/write speed 2m/s (79 ips)
Search/rewind speed 8 m/s (315 ips)
Note: Individual results may vary depending on the characteristics of the
data and other variables.