File System Performance Tuning - Fujitsu ETERNUS LT20 S2 User Manual

Chapter 3 Setting the Operating System
3.1 Solaris OS
(3) Check the device files.
Check the device files after the server reboots.
# ls /dev/rmt
• Example
The following example shows the device files when a 2-drive model LT20 S2/LT40 S2/LT60 S2 is connected
to a server (with only internal DAT devices installed) that is not connected to any other tape libraries.
# ls /dev/rmt
0 0cb
0b 0cbn
0bn 0cn
0c 0h
#
In this example, "0xxx" are device files for the internal DAT devices and "1xxx" and "2xxx" are device files
for the drives in the LT20 S2/LT40 S2/LT60 S2.
3.1.4

File System Performance Tuning

UFS performance may be reduced in an environment that uses ZFS.
If performance is reduced, set an appropriate value for the "zfs_arc_max" parameter in order to increase the
performance.
Refer to "Oracle Solaris ZFS Tunable Parameters" in "Oracle Solaris Tunable Parameters Reference Manual" for
details.
FUJITSU Storage ETERNUS LT20 S2/LT40 S2/LT60 S2 Tape Library User's Guide -Server Connection-
0hb 0lb 0mb 0u 1
0hbn 0lbn 0mbn 0ub 1b
0hn 0ln 0mn 0ubn 1bn
0l 0m 0n 0un 1c
Copyright 2021 FUJITSU LIMITED
1cb 1hb 1lb 1mb 1u
1cbn 1hbn 1lbn 1mbn 1ub
1cn 1hn 1ln 1mn 1ubn
1h 1l 1m 1n 1un
39
2 2cb 2hb 2lb 2mb
2b 2cbn 2hbn 2lbn 2mbn
2bn 2cn 2hn 2ln 2mn
2c 2h 2l 2m 2n
P3AM-5322-12ENZ0
2u
2ub
2ubn
2un