[linux-lvm] Lvm hangs on San fail

[jose nuno neto]

Hi2all

I'm on RHEL 5.4 with
lvm2-2.02.46-8.el5_4.1
2.6.18-164.2.1.el5

I have a multipathed SAN connection with what Im builing LVs
Its a Cluster system, and I want LVs to switch on failure

If I simulate a fail through the OS via /sys/bus/scsi/devices/$DEVICE/delete
I get a LV fail and the service switch to other node

But if I do it "real" portdown on the SAN Switch, multipath reports path
down, but LVM commands hang forever and nothing gets switched

from the logs i see multipath failing paths, and lvm Failed to remove faulty
"devices"

Any ideas how I should  "fix" it?

Apr 14 16:02:45 dc1-x6250-a lvm[15622]: Log device, 253:53, has failed.
Apr 14 16:02:45 dc1-x6250-a lvm[15622]: Device failure in
vg_ora_scapa-lv_ora_scapa_redo
Apr 14 16:02:45 dc1-x6250-a lvm[15622]: Another thread is handling an
event.  Waiting...

Apr 14 16:02:52 dc1-x6250-a multipathd: mpath-dc1-a: remaining active
paths: 0
Apr 14 16:02:52 dc1-x6250-a multipathd: mpath-dc1-a: remaining active
paths: 0
Apr 14 16:02:52 dc1-x6250-a multipathd: mpath-dc1-b: remaining active
paths: 0
Apr 14 16:02:52 dc1-x6250-a multipathd: mpath-dc1-b: remaining active
paths: 0

Apr 14 16:03:05 dc1-x6250-a lvm[15622]: Device failure in
vg_syb_roger-lv_syb_roger_admin
Apr 14 16:03:14 dc1-x6250-a lvm[15622]: Failed to remove faulty devices in
vg_syb_roger-lv_syb_roger_admin

Much Thanks
Jose