Proxmox 3.0 multipath - rdac checker failed to set TAS bit

[ebola]

Hallo everyone!
I installed proxmox 3.0 and I have a problem with multipath, which was not in the version 2.x. After setting up I received an error. Do you know what is TAS bit and what can i do to fix it?

Best regards
Ebola


IBM blade HS21 + DS4700

multipath -ll
Jul 16 10:31:19 | rdac checker failed to set TAS bit
ds4klun1 (3600a0b800048d23a00000f864dca2f98) dm-1 IBM,1814 FAStT
size=520G features='1 queue_if_no_path' hwhandler='1 rdac' wp=rw
|-+- policy='round-robin 0' prio=6 status=active
| `- 1:0:0:1 sdb 8:16 active ready running
`-+- policy='round-robin 0' prio=1 status=enabled
`- 0:0:0:1 sda 8:0 active ghost running

main multipath.conf

defaults {
udev_dir /dev
polling_interval 10
path_selector "round-robin 0"
path_grouping_policy failover
getuid_callout "/lib/udev/scsi_id -g -u -d /dev/%n"
prio rdac
path_checker rdac
rr_min_io 100
rr_weight priorities
failback immediate
no_path_retry fail
user_friendly_names no
}
blacklist {
wwid *
}

blacklist_exceptions {
wwid 3600a0b8cc78000010f9480004d2e9c17
wwid 3600a0b000f864dca2800048d23a00f98
}


multipaths {
multipath {
wwid 3600a0b8cc78000010f9480004d2e9c17
alias ds4klun0
path_grouping_policy failover
# prio mpath_prio_rdac /dev/%n
prio rdac
}
multipath {
wwid 3600a0b000f864dca2800048d23a00f98
alias ds4klun1
path_grouping_policy failover
# prio mpath_prio_rdac /dev/%n
prio rdac
}
}