I trying to setup multipathing with HSG80s on a Redhat 4 update 5 host.
I have it mostly working, the problem I'm having is that the 2 disks
I've created on the HSGs only go through one controller. I set the
preferred path for each disk to use a different controller but dm always
sets them to go through just one. I also can't find a way to move a disk
to the other controller, I thought multipathd -k switch would work but
it doesn't. Does anyone have RedHat4 and HSG80s working properly with
multipathing? Here is my multipath.conf file and multipath -ll output:
defaults {
user_friendly_names yes
}
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
rr_weight priorities
failback immediate
no_path_retry fail
user_friendly_name yes
features "1 queue_if_no_path"
}
devnode_blacklist {
devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
devnode "^hd[a-z]"
devnode "^cciss!c[0-9]d[0-9]*"
}
multipaths {
multipath {
wwid 360001fe1000d85f000039341397602d2
alias disk1
path_grouping_policy multibus
path_checker readsector0
path_selector "round-robin 0"
failback manual
rr_weight priorities
no_path_retry 5
}
multipath {
wwid 360001fe1000d85f0000393413976024b
alias disk2
path_grouping_policy multibus
path_checker readsector0
path_selector "round-robin 0"
failback manual
rr_weight priorities
no_path_retry 5
}
}
devices {
device {
vendor DEC
product HSG80
path_grouping_policy group_by_serial
getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
path_checker hp_sw
features "1 queue_if_no_path"
}
device {
vendor DEC
product "HSG80 (C) DEC"
path_grouping_policy group_by_serial
getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
path_checker hp_sw
features "1 queue_if_no_path"
}
}
[root@lin380g5-ib etc]# multipath -ll
disk2 (360001fe1000d85f0000393413976024b)
[size=339 GB][features="1 queue_if_no_path"][hwhandler="0"]
\_ round-robin 0 [active]
\_ 0:0:4:11 sdb 8:16 [active][ready]
\_ 0:0:5:11 sdd 8:48 [active][ghost]
\_ 1:0:4:11 sdf 8:80 [active][ready]
\_ 1:0:5:11 sdh 8:112 [active][ghost]
disk1 (360001fe1000d85f000039341397602d2)
[size=67 GB][features="1 queue_if_no_path"][hwhandler="0"]
\_ round-robin 0 [active]
\_ 0:0:4:20 sda 8:0 [active][ready]
\_ 0:0:5:20 sdc 8:32 [active][ghost]
\_ 1:0:4:20 sde 8:64 [active][ready]
\_ 1:0:5:20 sdg 8:96 [active][ghost]
Thanks
--
Eric Ritchie
Interactive Brokers LLC
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