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[dm-devel] i/o error due to all path failure with rdac



Hi,

  I am running an online/offline test. I have two paths to the controller. One is active and one is passive. When I fail (offline) the active path (sde 8:64), the Device mapper is failing passive path(sdf 8:80) as well leading to all path failure.  Any ideas or hints?

Here is output multipath -ll. I have only one lun.

[root localhost ~]# multipath -ll
mpathie (3600a0b80000f6a7d0000cff048fed59c) dm-2 LSI,INF-01-00
[size=10G][features=1 queue_if_no_path][hwhandler=1 rdac][rw]
\_ round-robin 0 [prio=2][enabled]
 \_ 3:0:0:0 sde 8:64  [active][undef]
\_ round-robin 0 [prio=1][enabled]
 \_ 3:0:1:0 sdf 8:80  [active][undef]


Here is the detailed log.

Oct 24 16:50:50 localhost multipathd: sdf: rdac prio = 0
Oct 24 16:51:06 localhost kernel: sd 3:0:0:0: [sde] Result: hostbyte=DID_BUS_BUSY driverbyte=DRIVER_OK,SUGGEST_OK
Oct 24 16:51:06 localhost kernel: end_request: I/O error, dev sde, sector 1047072
Oct 24 16:51:06 localhost kernel: device-mapper: multipath: Failing path 8:64.
Oct 24 16:51:06 localhost multipathd: mpathie: rr_weight = 2 (controller setting)
Oct 24 16:51:06 localhost multipathd: mpathie: pgfailback = 100 (controller setting)
Oct 24 16:51:06 localhost multipathd: mpathie: no_path_retry = 10 (controller setting)
Oct 24 16:51:06 localhost multipathd: pg_timeout = NONE (internal default)
Oct 24 16:51:06 localhost multipathd: 8:64: mark as failed
Oct 24 16:51:06 localhost multipathd: uevent 'change' from '/block/dm-2'
Oct 24 16:51:06 localhost multipathd: UDEV_LOG=3
Oct 24 16:51:06 localhost multipathd: ACTION=change
Oct 24 16:51:06 localhost multipathd: DEVPATH=/block/dm-2
Oct 24 16:51:06 localhost multipathd: SUBSYSTEM=block
Oct 24 16:51:06 localhost multipathd: DM_TARGET=multipath
Oct 24 16:51:06 localhost multipathd: DM_ACTION=PATH_FAILED
Oct 24 16:51:06 localhost multipathd: DM_SEQNUM=1
Oct 24 16:51:06 localhost multipathd: DM_PATH=8:64
Oct 24 16:51:06 localhost multipathd: DM_NR_VALID_PATHS=1
Oct 24 16:51:06 localhost multipathd: DM_NAME=mpathie
Oct 24 16:51:06 localhost multipathd: DM_UUID=mpath-3600a0b80000f6a7d0000cff048fed59c
Oct 24 16:51:06 localhost multipathd: MAJOR=253
Oct 24 16:51:06 localhost multipathd: MINOR=2
Oct 24 16:51:06 localhost multipathd: DEVTYPE=disk
Oct 24 16:51:06 localhost multipathd: SEQNUM=1254
Oct 24 16:51:06 localhost multipathd: UDEVD_EVENT=1
Oct 24 16:51:06 localhost multipathd: dm-2: add map (uevent)
Oct 24 16:51:08 localhost kernel: device-mapper: multipath: Failing path 8:80.
Oct 24 16:51:08 localhost multipathd: mpathie: devmap event #3
Oct 24 16:51:08 localhost multipathd: mpathie: discover
Oct 24 16:51:08 localhost multipathd: mpathie: rr_weight = 2 (controller setting)
Oct 24 16:51:08 localhost multipathd: mpathie: pgfailback = 100 (controller setting)
Oct 24 16:51:08 localhost multipathd: mpathie: no_path_retry = 10 (controller setting)
Oct 24 16:51:08 localhost multipathd: pg_timeout = NONE (internal default)
Oct 24 16:51:08 localhost multipathd: 8:80: mark as failed
Oct 24 16:51:08 localhost multipathd: mpathie: Entering recovery mode: max_retries=10
Oct 24 16:51:08 localhost multipathd: uevent 'change' from '/block/dm-2'
Oct 24 16:51:08 localhost multipathd: UDEV_LOG=3
Oct 24 16:51:08 localhost multipathd: ACTION=change
Oct 24 16:51:08 localhost multipathd: DEVPATH=/block/dm-2
Oct 24 16:51:08 localhost multipathd: SUBSYSTEM=block
Oct 24 16:51:08 localhost multipathd: DM_TARGET=multipath
Oct 24 16:51:08 localhost multipathd: DM_ACTION=PATH_FAILED
Oct 24 16:51:08 localhost multipathd: DM_SEQNUM=2
Oct 24 16:51:08 localhost multipathd: DM_PATH=8:80
Oct 24 16:51:08 localhost multipathd: DM_NR_VALID_PATHS=0
Oct 24 16:51:08 localhost multipathd: DM_NAME=mpathie
Oct 24 16:51:08 localhost multipathd: DM_UUID=mpath-3600a0b80000f6a7d0000cff048fed59c
Oct 24 16:51:08 localhost multipathd: MAJOR=253
Oct 24 16:51:08 localhost multipathd: MINOR=2
Oct 24 16:51:08 localhost multipathd: DEVTYPE=disk
Oct 24 16:51:08 localhost multipathd: SEQNUM=1255
Oct 24 16:51:08 localhost multipathd: UDEVD_EVENT=1
Oct 24 16:51:08 localhost multipathd: dm-2: add map (uevent)
Oct 24 16:51:36 localhost kernel:  rport-3:0-2: blocked FC remote port time out: removing target and saving binding
Oct 24 16:51:36 localhost multipathd: sde: rdac checker reports path is down
Oct 24 16:51:36 localhost multipathd: sde: mask = 0x8
Oct 24 16:51:36 localhost kernel: sd 3:0:0:0: [sde] Synchronizing SCSI cache
Oct 24 16:51:36 localhost kernel: sd 3:0:0:0: [sde] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK,SUGGEST_OK
Oct 24 16:51:36 localhost kernel: scsi 3:0:0:0: rdac: Detached
Oct 24 16:51:36 localhost multipathd: uevent 'remove' from '/class/scsi_generic/sg5'
Oct 24 16:51:36 localhost multipathd: UDEV_LOG=3
Oct 24 16:51:36 localhost multipathd: ACTION=remove
Oct 24 16:51:36 localhost multipathd: DEVPATH=/class/scsi_generic/sg5
Oct 24 16:51:36 localhost multipathd: SUBSYSTEM=scsi_generic
Oct 24 16:51:36 localhost multipathd: MAJOR=21
Oct 24 16:51:36 localhost multipathd: MINOR=5
Oct 24 16:51:36 localhost multipathd: PHYSDEVPATH=/devices/pci0000:00/0000:00:02.0/0000:06:00.3/0000:0b:01.0/host3/rport-3:0-2/target3:0:0/3:0:0:0
Oct 24 16:51:36 localhost multipathd: PHYSDEVBUS=scsi
Oct 24 16:51:36 localhost multipathd: PHYSDEVDRIVER=sd
Oct 24 16:51:36 localhost multipathd: SEQNUM=1256
Oct 24 16:51:36 localhost multipathd: UDEVD_EVENT=1
Oct 24 16:51:36 localhost multipathd: DEVNAME=/dev/sg5
Oct 24 16:51:36 localhost multipathd: uevent 'remove' from '/class/scsi_device/3:0:0:0'
Oct 24 16:51:36 localhost multipathd: UDEV_LOG=3
Oct 24 16:51:36 localhost kernel: device-mapper: multipath: Failing path 8:80.
Oct 24 16:51:36 localhost multipathd: ACTION=remove
Oct 24 16:51:36 localhost UnixSmash4[9200]: 7:UnixSmash has experienced a write failure.

Thanks
Babu Moger



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