Appendix C: Multipathing on Linux
395
4. Edit the file to include the following lines under devices:
devices {
device {
vendor "Promise"
product "VTrak"
path_grouping_policy multibus
getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
path_checker readsector0
path_selector "round-robin 0"
hardware_handler "0"
failback immediate
rr_weight uniform
rr_min_io 100
no_path_retry 20
features "1 queue_if_no_path"
product_blacklist "VTrak V-LUN"
}
}
5. Edit the file to include the following lines under devnode_blacklist:
devnode_blacklist {
devnode "^sda$"
devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
devnode "^hd[a-z]"
devnode "^cciss!c[0-9]d[0-9]*"
}
6. Be sure all the relevant lines of your configuration file are uncommented.
Remove the # character from the beginning of the line.
7. Save the file as multipath.conf.
8. Place a copy of the multipath.conf file into the Host’s /etc directory.
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