I am aware that the Seagate SMR 8tb archive drives are not meant to be
used in a RAID environment as they lack TLER/ERC support.
We are trying to use these drives with mdraid and are seeing problems.
It seems that after writing to these drives for few hours, occasionally
some drives stop responding for few minutes and recover on its own
later. (This was expected).
I have increased the device timeouts to 480 seconds now
(sys/block/<device>/device/timeout). The md device is assembled on top
of dm-multipath devices and dm-multipath is configured to retry 50 times
(no_path_retry=50). I have also changed queue_depth for each device to 1
(NCQ disabled).
Usually when I see retries and a drive stops responding, it recovers on
its own after few minutes and the md layer does not fail the disk.
Occasionally though, the md layer fails the disk after ~15 seconds or so
of the drive becoming non-responsive. See below.
sdlm and sdfb are the same disk (mpathaw, dm-231,dm-226). Why does the
md layer not wait for 480 seconds before failing the disk. As you can
see the drive recovered after ~ 8 minutes but the md layer failed it
after ~15 seconds.
What other tunables can I tune to avoid kicking a drive out early.
Aug 14 13:01:12 dc045 kernel: mpt2sas3: log_info(0x31120303):
originator(PL), code(0x12), sub_code(0x0303)
Aug 14 13:01:12 dc045 kernel: mpt2sas3:
_scsih_sas_broadcast_primitive_event: enter: phy number(7), width(8)
Aug 14 13:01:12 dc045 kernel: mpt2sas1:
_scsih_sas_broadcast_primitive_event: enter: phy number(7), width(8)
Aug 14 13:05:24 dc045 kernel: mpt2sas3: log_info(0x31120303):
originator(PL), code(0x12), sub_code(0x0303)
Aug 14 13:05:24 dc045 kernel: mpt2sas3:
_scsih_sas_broadcast_primitive_event: enter: phy number(7), width(8)
Aug 14 13:05:24 dc045 kernel: mpt2sas1:
_scsih_sas_broadcast_primitive_event: enter: phy number(7), width(8)
Aug 14 13:12:19 dc045 kernel: mpt2sas3: log_info(0x31120303):
originator(PL), code(0x12), sub_code(0x0303)
Aug 14 13:12:19 dc045 kernel: mpt2sas3:
_scsih_sas_broadcast_primitive_event: enter: phy number(7), width(8)
Aug 14 13:12:19 dc045 kernel: mpt2sas1:
_scsih_sas_broadcast_primitive_event: enter: phy number(7), width(8)
Aug 14 13:12:35 dc045 kernel: __ratelimit: 2 callbacks suppressed
Aug 14 13:12:35 dc045 kernel: sd 27:0:42:0: [sdlm] Unhandled sense code
Aug 14 13:12:35 dc045 kernel: sd 27:0:42:0: [sdlm] Result:
hostbyte=DID_OK driverbyte=DRIVER_SENSE
Aug 14 13:12:35 dc045 kernel: sd 27:0:42:0: [sdlm] Sense Key : Hardware
Error [current]
Aug 14 13:12:35 dc045 kernel: sd 27:0:42:0: [sdlm] <<vendor>> ASC=0x81
ASCQ=0x0ASC=0x81 ASCQ=0x0
Aug 14 13:12:35 dc045 kernel: sd 27:0:42:0: [sdlm] CDB: Write(10): 2a 00
55 6a 5e c8 00 00 b8 00
Aug 14 13:12:35 dc045 kernel: __ratelimit: 14 callbacks suppressed
Aug 14 13:12:35 dc045 kernel: sd 25:0:42:0: [sdfb] Unhandled sense code
Aug 14 13:12:35 dc045 kernel: sd 25:0:42:0: [sdfb] Result:
hostbyte=DID_OK driverbyte=DRIVER_SENSE
Aug 14 13:12:35 dc045 kernel: sd 25:0:42:0: [sdfb] Sense Key : Hardware
Error [current]
Aug 14 13:12:35 dc045 kernel: sd 25:0:42:0: [sdfb] <<vendor>> ASC=0x81
ASCQ=0x0ASC=0x81 ASCQ=0x0
Aug 14 13:12:35 dc045 kernel: sd 25:0:42:0: [sdfb] CDB: Write(10): 2a 00
55 6a 5f 80 00 00 10 00
Aug 14 13:12:35 dc045 kernel: sd 27:0:42:0: [sdlm] Unhandled sense code
Aug 14 13:12:35 dc045 kernel: sd 27:0:42:0: [sdlm] Result:
hostbyte=DID_OK driverbyte=DRIVER_SENSE
Aug 14 13:12:35 dc045 kernel: sd 27:0:42:0: [sdlm] Sense Key : Hardware
Error [current]
Aug 14 13:12:35 dc045 kernel: sd 27:0:42:0: [sdlm] <<vendor>> ASC=0x81
ASCQ=0x0ASC=0x81 ASCQ=0x0
Aug 14 13:12:35 dc045 kernel: sd 27:0:42:0: [sdlm] CDB: Write(10): 2a 00
55 6a 5f 90 00 03 38 00
Aug 14 13:12:35 dc045 kernel: sd 25:0:42:0: [sdfb] Unhandled sense code
Aug 14 13:12:35 dc045 kernel: sd 25:0:42:0: [sdfb] Result:
hostbyte=DID_OK driverbyte=DRIVER_SENSE
Aug 14 13:12:35 dc045 kernel: sd 25:0:42:0: [sdfb] Sense Key : Hardware
Error [current]
Aug 14 13:12:35 dc045 kernel: sd 25:0:42:0: [sdfb] <<vendor>> ASC=0x81
ASCQ=0x0ASC=0x81 ASCQ=0x0
Aug 14 13:12:35 dc045 kernel: sd 25:0:42:0: [sdfb] CDB: Read(16): 88 00
00 00 00 01 d5 59 50 a8 00 00 00 08 00 00
Aug 14 13:12:35 dc045 kernel: sd 27:0:42:0: [sdlm] Unhandled sense code
Aug 14 13:12:35 dc045 kernel: sd 27:0:42:0: [sdlm] Result:
hostbyte=DID_OK driverbyte=DRIVER_SENSE
Aug 14 13:12:35 dc045 kernel: sd 27:0:42:0: [sdlm] Sense Key : Hardware
Error [current]
Aug 14 13:12:35 dc045 kernel: sd 27:0:42:0: [sdlm] <<vendor>> ASC=0x81
ASCQ=0x0ASC=0x81 ASCQ=0x0
Aug 14 13:12:35 dc045 kernel: sd 27:0:42:0: [sdlm] CDB: Read(16): 88 00
00 00 00 01 d5 59 50 b0 00 00 00 80 00 00
Aug 14 13:12:35 dc045 kernel: sd 25:0:42:0: [sdfb] Unhandled sense code
Aug 14 13:12:35 dc045 kernel: sd 25:0:42:0: [sdfb] Result:
hostbyte=DID_OK driverbyte=DRIVER_SENSE
Aug 14 13:12:35 dc045 kernel: sd 25:0:42:0: [sdfb] Sense Key : Hardware
Error [current]
Aug 14 13:12:35 dc045 kernel: sd 25:0:42:0: [sdfb] <<vendor>> ASC=0x81
ASCQ=0x0ASC=0x81 ASCQ=0x0
Aug 14 13:12:35 dc045 kernel: sd 25:0:42:0: [sdfb] CDB: Read(10): 28 00
55 6a 78 00 00 00 50 00
Aug 14 13:12:35 dc045 kernel: end_request: critical target error, dev
dm-226, sector 7874367664
Aug 14 13:12:35 dc045 kernel: end_request: critical target error, dev
dm-226, sector 1433040896
Aug 14 13:12:35 dc045 kernel: sd 25:0:42:0: [sdfb] Unhandled sense code
Aug 14 13:12:35 dc045 kernel: sd 25:0:42:0: [sdfb] Result:
hostbyte=DID_OK driverbyte=DRIVER_SENSE
Aug 14 13:12:35 dc045 kernel: sd 25:0:42:0: [sdfb] Sense Key : Hardware
Error [current]
Aug 14 13:12:35 dc045 kernel: sd 25:0:42:0: [sdfb] <<vendor>> ASC=0x81
ASCQ=0x0ASC=0x81 ASCQ=0x0
Aug 14 13:12:35 dc045 kernel: sd 25:0:42:0: [sdfb] CDB: Write(10): 2a 00
00 00 08 08 00 00 01 00
Aug 14 13:12:35 dc045 kernel: end_request: critical target error, dev
sdfb, sector 2056
Aug 14 13:12:35 dc045 kernel: sd 27:0:42:0: [sdlm] Unhandled sense code
Aug 14 13:12:35 dc045 kernel: sd 27:0:42:0: [sdlm] Result:
hostbyte=DID_OK driverbyte=DRIVER_SENSE
Aug 14 13:12:35 dc045 kernel: sd 27:0:42:0: [sdlm] Sense Key : Hardware
Error [current]
Aug 14 13:12:35 dc045 kernel: sd 27:0:42:0: [sdlm] <<vendor>> ASC=0x81
ASCQ=0x0ASC=0x81 ASCQ=0x0
Aug 14 13:12:35 dc045 kernel: sd 27:0:42:0: [sdlm] CDB: Read(10): 28 00
55 6a 7b e0 00 00 20 00
Aug 14 13:12:35 dc045 kernel: end_request: critical target error, dev
sdlm, sector 1433041888
Aug 14 13:12:35 dc045 kernel: end_request: critical target error, dev
dm-226, sector 1433041888
Aug 14 13:12:35 dc045 kernel: mpt2sas1:
_scsih_sas_broadcast_primitive_event: enter: phy number(7), width(8)
Aug 14 13:12:35 dc045 kernel: sd 27:0:42:0: [sdlm] Unhandled sense code
Aug 14 13:12:35 dc045 kernel: sd 27:0:42:0: [sdlm] Result:
hostbyte=DID_OK driverbyte=DRIVER_SENSE
Aug 14 13:12:35 dc045 kernel: sd 27:0:42:0: [sdlm] Sense Key : Hardware
Error [current]
Aug 14 13:12:35 dc045 kernel: sd 27:0:42:0: [sdlm] <<vendor>> ASC=0x81
ASCQ=0x0ASC=0x81 ASCQ=0x0
Aug 14 13:12:35 dc045 kernel: sd 27:0:42:0: [sdlm] CDB: Read(10): 28 00
00 00 00 00 00 00 08 00
Aug 14 13:12:35 dc045 kernel: end_request: critical target error, dev
sdlm, sector 0
Aug 14 13:12:35 dc045 kernel: end_request: critical target error, dev
dm-226, sector 2056
Aug 14 13:12:35 dc045 kernel: md: super_written gets error=-121, uptodate=0
Aug 14 13:12:35 dc045 kernel: md/raid:md8: Disk failure on dm-231,
disabling device.
Aug 14 13:12:35 dc045 kernel: md/raid:md8: Operation continuing on 13
devices.
Aug 14 13:12:35 dc045 kernel: sd 27:0:42:0: [sdlm] Unhandled sense code
Aug 14 13:12:35 dc045 kernel: sd 27:0:42:0: [sdlm] Result:
hostbyte=DID_OK driverbyte=DRIVER_SENSE
Aug 14 13:12:35 dc045 kernel: sd 27:0:42:0: [sdlm] Sense Key : Hardware
Error [current]
Aug 14 13:12:35 dc045 kernel: sd 27:0:42:0: [sdlm] <<vendor>> ASC=0x81
ASCQ=0x0ASC=0x81 ASCQ=0x0
Aug 14 13:12:35 dc045 kernel: sd 27:0:42:0: [sdlm] CDB: Write(10): 2a 00
55 6a 62 c8 00 04 00 00
Aug 14 13:12:35 dc045 kernel: end_request: critical target error, dev
sdlm, sector 1433035464
Aug 14 13:12:35 dc045 kernel: mpt2sas3:
_scsih_sas_broadcast_primitive_event: enter: phy number(7), width(8)
Aug 14 13:12:35 dc045 kernel: end_request: critical target error, dev
dm-226, sector 1433035464
Aug 14 13:12:35 dc045 kernel: end_request: critical target error, dev
sdfb, sector 1433036488
Aug 14 13:12:35 dc045 kernel: end_request: critical target error, dev
dm-226, sector 1433036488
Aug 14 13:12:35 dc045 kernel: end_request: critical target error, dev
sdlm, sector 1433037512
Aug 14 13:12:35 dc045 kernel: end_request: critical target error, dev
dm-226, sector 1433037512
Aug 14 13:12:35 dc045 kernel: end_request: critical target error, dev
sdfb, sector 2128
Aug 14 13:12:35 dc045 kernel: end_request: critical target error, dev
dm-226, sector 2128
Aug 14 13:12:35 dc045 kernel: md: super_written gets error=-121, uptodate=0
Aug 14 13:12:36 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:12:36 dc045 multipathd: checker failed path 68:320 in map mpathaw
Aug 14 13:12:36 dc045 multipathd: mpathaw: remaining active paths: 1
Aug 14 13:12:36 dc045 kernel: device-mapper: multipath: Failing path 68:320.
Aug 14 13:13:17 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:13:25 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:13:25 dc045 multipathd: checker failed path 129:208 in map mpathaw
Aug 14 13:13:25 dc045 multipathd: mpathaw: Entering recovery mode:
max_retries=50
Aug 14 13:13:25 dc045 multipathd: mpathaw: remaining active paths: 0
Aug 14 13:13:25 dc045 kernel: device-mapper: multipath: Failing path
129:208.
Aug 14 13:13:25 dc045 multipathd: mpathaw: Entering recovery mode:
max_retries=50
Aug 14 13:13:27 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:13:35 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:13:37 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:13:45 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:13:47 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:13:55 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:13:57 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:14:05 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:14:07 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:14:15 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:14:17 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:14:25 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:14:27 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:14:35 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:14:37 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:14:46 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:14:48 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:14:56 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:14:58 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:15:06 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:15:08 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:15:16 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:15:18 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:15:26 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:15:28 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:15:36 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:15:38 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:15:46 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:15:48 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:15:56 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:15:58 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:16:06 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:16:08 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:16:16 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:16:18 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:16:26 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:16:28 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:16:37 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:16:39 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:16:47 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:16:49 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:16:57 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:16:59 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:17:07 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:17:09 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:17:17 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:17:19 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:17:27 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:17:29 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:17:37 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:17:39 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:17:47 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:17:49 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:17:57 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:17:59 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:18:07 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:18:09 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:18:17 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:18:19 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:18:28 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:18:30 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:18:38 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:18:40 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:18:48 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:18:50 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:18:58 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:19:00 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:19:08 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:19:10 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:19:18 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:19:20 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:19:28 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:19:30 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:19:38 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:19:40 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:19:48 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:19:50 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:19:58 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:20:00 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:20:08 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:20:11 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:20:19 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:20:21 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:20:29 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is down
Aug 14 13:20:31 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is down
Aug 14 13:20:37 dc045 kernel: sd 25:0:42:0: attempting task abort!
scmd(ffff881c6e49aec0)
Aug 14 13:20:37 dc045 kernel: sd 25:0:42:0: [sdfb] CDB: Write(10): 2a 00
55 6a 72 c8 00 01 68 00
Aug 14 13:20:37 dc045 kernel: scsi target25:0:42: handle(0x0037),
sas_address(0x5000c5007b2ee20d), phy(18)
Aug 14 13:20:37 dc045 kernel: scsi target25:0:42:
enclosure_logical_id(0x500093d00104c000), slot(39)
Aug 14 13:20:37 dc045 kernel: sd 27:0:42:0: attempting task abort!
scmd(ffff880c35fba7c0)
Aug 14 13:20:37 dc045 kernel: sd 27:0:42:0: [sdlm] CDB: Write(10): 2a 00
55 6a 6e c8 00 04 00 00
Aug 14 13:20:37 dc045 kernel: scsi target27:0:42: handle(0x0037),
sas_address(0x5000c5007b2ee20e), phy(18)
Aug 14 13:20:37 dc045 kernel: scsi target27:0:42:
enclosure_logical_id(0x500093d00104c000), slot(39)
Aug 14 13:20:37 dc045 kernel: sd 25:0:42:0: task abort: SUCCESS
scmd(ffff881c6e49aec0)
Aug 14 13:20:37 dc045 kernel: sd 27:0:42:0: task abort: SUCCESS
scmd(ffff880c35fba7c0)
Aug 14 13:20:37 dc045 kernel: mpt2sas3:
_scsih_sas_broadcast_primitive_event: enter: phy number(7), width(8)
Aug 14 13:20:37 dc045 kernel: mpt2sas1:
_scsih_sas_broadcast_primitive_event: enter: phy number(5), width(8)
Aug 14 13:20:39 dc045 multipathd: mpathaw: sdfb - directio checker
reports path is up
Aug 14 13:20:39 dc045 multipathd: 129:208: reinstated
Aug 14 13:20:39 dc045 multipathd: mpathaw: queue_if_no_path enabled
Aug 14 13:20:39 dc045 multipathd: mpathaw: Recovered to normal mode
Aug 14 13:20:39 dc045 multipathd: mpathaw: remaining active paths: 1
Aug 14 13:20:41 dc045 multipathd: mpathaw: sdlm - directio checker
reports path is up
Aug 14 13:20:41 dc045 multipathd: 68:320: reinstated
Aug 14 13:20:41 dc045 multipathd: mpathaw: remaining active paths: 2
Aug 14 13:21:12 dc045 kernel: md: unbind<dm-231>
Aug 14 13:21:12 dc045 kernel: md: export_rdev(dm-231)
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