Here's my config for RHEL5u3, against DS4800:
[janfr...@lagring1 ~]$ grep -v ^# /etc/multipath.conf|grep -v ^$
blacklist {
#devnode "*"
}
defaults {
user_friendly_names yes
}
devices {
device {
vendor "IBM"
product "1815"
prio_callout "/sbin/mpath_prio_rdac /dev/%n"
path_grouping_policy group_by_prio
failback immediate
path_checker rdac
hardware_handler "1 rdac"
user_friendly_names yes
}
}
I think the new thing in RHEL5u3 was that if you preload the scsi_dh_rdac
module, you woun't get lots of scsi errors during boot. To preload this
module, you'll need to create a new initrd using:
mkinitrd /boot/initrd-$(uname -r)-scsi_dh.img $(uname -r)
--preload=scsi_dh_rdac
and update your grub.conf to use this initrd.
HTH.
-jf
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