Hi list,
we're trying to get multipath working on a server (which run SLES 10)
connected to a STK FLEXLINE 380 SAN. This SAN has AVT (Auto Volume
Transfer) activated and we have two LUNs exported to the server, which
one on a different preferred path (one on controller A and the other on
controller B).
Since the SAN has AVT activated and that we are using preferred path,
i'm guessing that we have to use group_by_prio policy with the
mpath_prio_tpc callout program.
I can see that mpath_prio_tpc get the right priority :
# mpath_prio_tpc /dev/sda
3
# mpath_prio_tpc /dev/sdb
0
# mpath_prio_tpc /dev/sdd
0
# mpath_prio_tpc /dev/sde
3
and then if i issue "fdisk -l" on /dev/sda and /dev/sde, each LUN stay
on his preferred controller on the SAN.
The problem is when i start multipath, it will not coalesces the paths
together.
Here's my multipath.conf :
defaults {
udev_dir /dev
polling_interval 10
path_grouping_policy group_by_prio
getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
prio_callout "/sbin/mpath_prio_tpc /dev/%n"
path_checker tur
rr_weight priorities
failback immediate
# user_friendly_names yes
}