Owner's Manual

iSCSI Cluster Setup for EqualLogic Storage Systems 55
Configuring Device Mapper Multipath to Volumes
1 Run the /sbin/scsi_id command against the devices created for Oracle to
obtain their unique device identifiers:
/sbin/scsi_id -gus /block/<device>
For example:
# scsi_id -gus /block/sda
2 Uncomment the following section in /etc/multipath.conf .
blacklist {
wwid <enter local disk wwid here>
devnode "^(ram|raw|loop|fd|md|dm-
|sr|scd|st)[0-9]*"
devnode "^hd[a-z]"
}
3 Uncomment the following section in /etc/multipath.conf .
defaults {
udev_dir /dev
polling_interval 10
selector "round-robin 0"
path_grouping_policy multibus
getuid_callout "/sbin/scsi_id -g -u -s
/block/%n"
prio_callout /bin/true
path_checker readsector0
rr_min_io 100
max_fds 8192
rr_weight priorities
failback immediate
no_path_retry fail
user_friendly_names yes
}