Accusys ExaRAID GUI - Manual (Page 187)

Advanced Functions
5-14
1. To view the LUNs of the attached RAID systems, type cat /proc/scsi/
scsi, and similar outputs are displayed as below:
2. To check if multipathd service has been activated or not, type
chkconfig --list multipathd.
3. To check if service has been running or not, type serivce -- status-
all.The multipathd provides several commands for configuring the
paths as well as showing path and device information. Type multipathd
-k to enter its interactive mode.
4. You may also use multipath command to configure, list, and remove
multi-path devices.
5. To add or remove LUNS, after completing the changes to the RAID
system configurations, restart the service by typing service multipathd
restart. Modifying the configuration needs also to restart the service to
make the modifications effective.
6. If you’re running Linux cluster and need to have consistent multi-path
device names, you need to use the alias option in multipath.conf or to
use the Linux persistent binding.
For complete information, please go to RedHat and Novell web site to
find the following online documents:
- RedHat: “Using Device-Mapper Multipath”
- Novell SUSE: “SLES Storage Administration Guide”
devices {
device {
vendor "vendorname"
product "productname"
path_grouping_policy group_by_prio
getuid_callout "/sbin/scsi_id -p 0x80 -g -u -s /block/%n"
prio_callout "/sbin/acs_prio_alua %d"
hardware_handler "1 acs"
path_checker hp_sw
path_selector "round-robin 0"
failback immediate
no_path_retry queue
rr_min_io 100
product_blacklist LUN_Z
}
}