problem with md3200i multipath

[zoid]

Hi, I'm using a dell md3200i iscsi storage with proxmox 2.0. I'm seeing these in my log:

Apr 20 16:03:12 proxmox01 multipathd: sdf: rdac prio: sending inquiry command failed
Apr 20 16:03:31 proxmox01 multipathd: sdd: rdac prio: sending inquiry command failed
Apr 20 16:03:31 proxmox01 multipathd: sdc: rdac prio: sending inquiry command failed
Apr 20 16:03:31 proxmox01 multipathd: sde: rdac prio: sending inquiry command failed
Apr 20 16:03:32 proxmox01 multipathd: sdf: rdac prio: sending inquiry command failed

This is my setup

root@proxmox01:~# pveversion -V
pve-manager: 2.0-57 (pve-manager/2.0/ff6cd700)
running kernel: 2.6.32-11-pve
proxmox-ve-2.6.32: 2.0-65
pve-kernel-2.6.32-11-pve: 2.6.32-65
lvm2: 2.02.88-2pve2
clvm: 2.02.88-2pve2
corosync-pve: 1.4.1-1
openais-pve: 1.1.4-2
libqb: 0.10.1-2
redhat-cluster-pve: 3.1.8-3
resource-agents-pve: 3.9.2-3
fence-agents-pve: 3.1.7-2
pve-cluster: 1.0-26
qemu-server: 2.0-37
pve-firmware: 1.0-15
libpve-common-perl: 1.0-25
libpve-access-control: 1.0-17
libpve-storage-perl: 2.0-17
vncterm: 1.0-2
vzctl: 3.0.30-2pve2
vzprocps: 2.0.11-2
vzquota: 3.0.12-3
pve-qemu-kvm: 1.0-9
ksm-control-daemon: 1.1-1

36782bcb00077095300002d0b4f911276 dm-3 DELL,MD32xxi
size=8.0T features='3 queue_if_no_path pg_init_retries 50' hwhandler='1 rdac' wp=rw
`-+- policy='round-robin 0' prio=-4 status=active
|- 8:0:0:2 sdd 8:48 active undef running
|- 9:0:0:2 sdc 8:32 active undef running
|- 6:0:0:2 sde 8:64 active undef running
`- 7:0:0:2 sdf 8:80 active undef running

/etc/multipath.conf

devices {
device {
filter = [ "a|/dev/cciss/.*|", "a|/dev/mapper/mpath[0-9]+|", "r/.*/" ]
vendor "DELL"
product "MD32xxi"
path_grouping_policy group_by_prio
#prio const
prio rdac
polling_interval 5
path_checker rdac
path_selector "round-robin 0"
hardware_handler "1 rdac"
failback immediate
features "2 pg_init_retries 50"
no_path_retry 30
rr_min_io 100
}
blacklikst {
devnode /dev/sda
devnode /dev/sdb
devnode /dev/md[0-9]
}
}

Any idea why could this be?