[dm-devel] A path to a different device was added to an existing mapth
Ilan Steinberg
ilan.steinberg at kaminario.com
Thu Mar 19 10:35:26 UTC 2015
Hi,
I have some more info:
multipathd> show maps
name sysfs uuid
mpathhs dm-2 20024f400d5190000
mpathit dm-16 20024f400d519002b
mpathis dm-15 20024f400d519001c
mpathin dm-11 20024f400d5190012
mpathim dm-14 20024f400d5190011
mpathiw dm-13 20024f400d5190010
mpathhz dm-7 20024f400d5190006
mpathhx dm-6 20024f400d5190005
mpathhw dm-5 20024f400d5190004
mpathht dm-8 20024f400d5190003
mpathij dm-12 20024f400d519000e
mpathil dm-10 20024f400d519000d
mpathhv dm-3 20024f400d5190001
mpathik dm-9 20024f400d519000f
mpathhu dm-4 20024f400d5190002
It seems that mpathiw is indeed with the uuid of sdag but...
note that if you run 'multipath -l' you will see mpathiw having the correct
signature (20024f400d5190026) - because it queries it again from the storage.
Also:
multipathd> show paths format "%d %s %S %w"
dev vend/prod/rev size uuid
.
.
sdaf KMNRIO,K2 300G 20024f400d519001e
.
sdw KMNRIO,K2 100G 20024f400d5190010
.
.
sdz KMNRIO,K2 100G 20024f400d5190026
.
sdag KMNRIO,K2 300G 20024f400d5190010
Unfortunately, the device for sdag was deleted from the storage, but I can still see that:
[root at il-ksm3-044 ~]# sg_inq -p 0x83 /dev/sdw
VPD INQUIRY: Device Identification page
Designation descriptor number 1, descriptor length: 36
designator_type: T10 vendor identification, code_set: ASCII
associated with the addressed logical unit
vendor id: KMNRIO
vendor specific: ATF-VG-1:EXP-SNAd5190026
Designation descriptor number 2, descriptor length: 12
designator_type: EUI-64 based, code_set: Binary
associated with the addressed logical unit
EUI-64 based 8 byte identifier
IEEE Company_id: 0x24f4
Vendor Specific Extension Identifier: 0xd5190026
[0x0024f400d5190026]
[root at il-ksm3-044 ~]# sg_inq -p 0x83 /dev/sdz
VPD INQUIRY: Device Identification page
Designation descriptor number 1, descriptor length: 36
designator_type: T10 vendor identification, code_set: ASCII
associated with the addressed logical unit
vendor id: KMNRIO
vendor specific: ATF-VG-1:EXP-SNAd5190026
Designation descriptor number 2, descriptor length: 12
designator_type: EUI-64 based, code_set: Binary
associated with the addressed logical unit
EUI-64 based 8 byte identifier
IEEE Company_id: 0x24f4
Vendor Specific Extension Identifier: 0xd5190026
[0x0024f400d5190026]
So, sdw and sdz are path to the same device, and so are sdaf and sdag...
Regards,
Ilan Steinberg
________________________________
From: Ilan Steinberg
Sent: Thursday, March 19, 2015 12:10 PM
To: dm-devel at redhat.com
Cc: Eli Malul; Guy Keren; Shahar Salzman
Subject: A path to a different device was added to an existing mapth
Hello,
I have never posted here before but I can across an interesting error.
I have run into a situation were a path (sdag) to LUN 15 with a scsi serial number of ending with 0xd5190010 was added to an mapth (mpathiw) which is for LUN 11 with scsi serial number ending with 0xd5190026 (sdz and sdw)
I would appreciate any help understanding how/why this happened.
Initiator Info:
Linux il-ksm3-044 2.6.32-431.el6.x86_64 #1
device-mapper-multipath version 0.4.9
multipath.conf:
defaults {
user_friendly_names yes
polling_interval 10
verbosity 2
}
devices {
device {
vendor "KMNRIO"
product "K2"
path_grouping_policy multibus
getuid_callout "/lib/udev/scsi_id --whitelisted --device=/dev/%n"
path_checker tur
path_selector "queue-length 0"
no_path_retry fail
hardware_handler "0"
rr_weight priorities
rr_min_io 1
failback 15
fast_io_fail_tmo 5
dev_loss_tmo 8
}
}
Since I see that sdz and sdw used to belong to mapthiv (was it renamed to mathiw?)
This might be useful info - in the bindings file I see:
...
mpathiv 20024f400d5190010 <---------------------------------------- this is the scsi_sn of sdag
mpathiw 20024f400d5190026 <---------------------------------------- this is the scsi_sn of sdz/w
...
I am adding the relevant host logs (I can add the full logs if needed) - error is in the last log line:
Mar 14 09:44:36 il-ksm3-044 kernel: sdag: detected capacity change from 0 to 322122547200
Mar 14 09:59:35 il-ksm3-044 kernel: sd 8:0:1:15: [sdag] Warning! Received an indication that the LUN reached a thin provisioning soft threshold.
Mar 14 10:00:06 il-ksm3-044 kernel: sd 8:0:1:15: [sdag] Warning! Received an indication that the LUN reached a thin provisioning soft threshold.
Mar 14 10:00:21 il-ksm3-044 kernel: sd 8:0:1:15: [sdag] Warning! Received an indication that the LUN reached a thin provisioning soft threshold.
Mar 14 10:26:31 il-ksm3-044 kernel: end_request: I/O error, dev sdz, sector 167369280
Mar 14 10:26:31 il-ksm3-044 kernel: end_request: I/O error, dev sdz, sector 80032448
Mar 14 10:26:44 il-ksm3-044 multipathd: sdz: remove path (uevent)
Mar 14 10:26:44 il-ksm3-044 multipathd: sdz [65:144]: path removed from map mpathiv
Mar 14 10:26:44 il-ksm3-044 multipathd: sdag: remove path (uevent)
Mar 14 10:26:44 il-ksm3-044 multipathd: sdag [66:0]: path removed from map mpathks
Mar 14 10:26:44 il-ksm3-044 multipathd: mpathiv: load table [0 209715200 multipath 0 0 1 1 queue-length 0 1 1 65:96 1]
Mar 14 10:26:44 il-ksm3-044 multipathd: mpathks: load table [0 629145600 multipath 0 0 1 1 queue-length 0 1 1 65:240 1]
Mar 14 10:53:50 il-ksm3-044 kernel: sd 8:0:1:11: [sdz] 209715200 512-byte logical blocks: (107 GB/100 GiB)
Mar 14 10:53:50 il-ksm3-044 kernel: sd 8:0:1:11: [sdz] Write Protect is off
Mar 14 10:53:50 il-ksm3-044 kernel: sd 8:0:1:11: [sdz] Write cache: disabled, read cache: enabled, supports DPO and FUA
Mar 14 10:53:50 il-ksm3-044 kernel: sdz:
Mar 14 10:53:50 il-ksm3-044 kernel: sd 8:0:1:11: [sdz] Attached SCSI disk
Mar 14 10:53:50 il-ksm3-044 kernel: sd 8:0:1:15: [sdag] 629145600 512-byte logical blocks: (322 GB/300 GiB)
Mar 14 10:53:50 il-ksm3-044 kernel: sd 8:0:1:15: [sdag] Write Protect is off
Mar 14 10:53:50 il-ksm3-044 kernel: sd 8:0:1:15: [sdag] Write cache: disabled, read cache: enabled, supports DPO and FUA
Mar 14 10:53:50 il-ksm3-044 kernel: sdag: unknown partition table
Mar 14 10:53:50 il-ksm3-044 kernel: sd 8:0:1:15: [sdag] Attached SCSI disk
Mar 14 10:53:50 il-ksm3-044 multipathd: sdag: add path (uevent)
Mar 14 10:53:50 il-ksm3-044 multipathd: mpathks: failed in domap for addition of new path sdag
Mar 14 10:53:50 il-ksm3-044 multipathd: sdz: add path (uevent)
Mar 14 10:53:50 il-ksm3-044 multipathd: sdz [65:144]: path added to devmap mpathiv
Mar 14 10:53:50 il-ksm3-044 multipathd: mpathiv: load table [0 209715200 multipath 0 0 1 1 queue-length 0 2 1 65:96 1 65:144 1]
Mar 14 12:29:12 il-ksm3-044 multipathd: sdw: remove path (uevent)
Mar 14 12:29:12 il-ksm3-044 multipathd: mpathiv: load table [0 209715200 multipath 0 0 1 1 queue-length 0 1 1 65:144 1]
Mar 14 12:29:12 il-ksm3-044 multipathd: sdw [65:96]: path removed from map mpathiv
Mar 15 12:45:59 il-ksm3-044 kernel: sd 8:0:1:11: [sdz] Warning! Received an indication that the LUN assignments on this target have changed. The Linux SCSI layer does not automatically remap LUN assignments.
Mar 14 12:59:18 il-ksm3-044 kernel: sd 7:0:1:11: [sdw] 209715200 512-byte logical blocks: (107 GB/100 GiB)
Mar 14 12:59:18 il-ksm3-044 kernel: sd 7:0:1:11: [sdw] Write Protect is off
Mar 14 12:59:18 il-ksm3-044 kernel: sd 7:0:1:11: [sdw] Write cache: disabled, read cache: enabled, supports DPO and FUA
Mar 14 12:59:18 il-ksm3-044 kernel: sd 7:0:1:11: [sdw] Attached SCSI disk
Mar 14 12:59:18 il-ksm3-044 multipathd: sdw: add path (uevent)
Mar 14 12:59:18 il-ksm3-044 multipathd: mpathiv: load table [0 209715200 multipath 0 0 1 1 queue-length 0 2 1 65:144 1 65:96 1]
Mar 14 12:59:18 il-ksm3-044 multipathd: sdw [65:96]: path added to devmap mpathiv
Mar 15 11:45:27 il-ksm3-044 kernel: sdz: detected capacity change from 0 to 107374182400
Mar 15 11:45:33 il-ksm3-044 multipathd: mpathiw: event checker started
Mar 15 11:45:33 il-ksm3-044 multipathd: mpathiw: devmap dm-13 added
Mar 15 12:28:12 il-ksm3-044 multipathd: mpathiw: event checker exit
Mar 15 12:28:15 il-ksm3-044 multipathd: mpathiw: event checker started
Mar 15 12:28:15 il-ksm3-044 multipathd: mpathiw: devmap dm-13 added
Mar 15 12:56:35 il-ksm3-044 kernel: end_request: I/O error, dev sdz, sector 204563968
Mar 15 12:56:35 il-ksm3-044 kernel: end_request: I/O error, dev sdz, sector 193484032
Mar 15 12:56:35 il-ksm3-044 multipathd: mpathiw: remaining active paths: 1
Mar 15 12:56:48 il-ksm3-044 multipathd: sdz: remove path (uevent)
Mar 15 12:56:48 il-ksm3-044 multipathd: mpathiw: load table [0 209715200 multipath 0 0 1 1 queue-length 0 1 1 65:96 1]
Mar 15 12:56:48 il-ksm3-044 multipathd: sdz [65:144]: path removed from map mpathiw
Mar 15 12:56:48 il-ksm3-044 multipathd: sdag: remove path (uevent)
Mar 15 13:27:00 il-ksm3-044 kernel: sd 8:0:1:11: [sdz] 209715200 512-byte logical blocks: (107 GB/100 GiB)
Mar 15 13:27:00 il-ksm3-044 kernel: sd 8:0:1:11: [sdz] Write Protect is off
Mar 15 13:27:00 il-ksm3-044 kernel: sd 8:0:1:11: [sdz] Write cache: disabled, read cache: enabled, supports DPO and FUA
Mar 15 13:27:00 il-ksm3-044 kernel: sdz: unknown partition table
Mar 15 13:27:00 il-ksm3-044 kernel: sd 8:0:1:11: [sdz] Attached SCSI disk
Mar 15 13:27:00 il-ksm3-044 multipathd: sdz: add path (uevent)
Mar 15 13:27:00 il-ksm3-044 multipathd: mpathiw: failed in domap for addition of new path sdz
Mar 15 15:20:41 il-ksm3-044 multipathd: mpathiw: devmap dm-13 added
Mar 15 17:38:36 il-ksm3-044 kernel: sd 8:0:1:11: [sdz] Warning! Received an indication that the LUN assignments on this target have changed. The Linux SCSI layer does not automatically remap LUN assignments.
Mar 15 18:44:54 il-ksm3-044 kernel: sd 8:0:1:15: [sdag] 629145600 512-byte logical blocks: (322 GB/300 GiB)
Mar 15 18:44:54 il-ksm3-044 kernel: sd 8:0:1:15: [sdag] Write Protect is off
Mar 15 18:44:54 il-ksm3-044 kernel: sd 8:0:1:15: [sdag] Write cache: disabled, read cache: enabled, supports DPO and FUA
Mar 15 18:44:54 il-ksm3-044 kernel: sdag: unknown partition table
Mar 15 18:44:54 il-ksm3-044 kernel: sd 8:0:1:15: [sdag] Attached SCSI disk
Mar 15 18:44:55 il-ksm3-044 multipathd: sdag: add path (uevent)
Mar 15 18:44:55 il-ksm3-044 multipathd: mpathiw: load table [0 209715200 multipath 0 0 1 1 queue-length 0 3 1 65:96 1 65:144 1 66:0 1]
Mar 15 18:44:55 il-ksm3-044 multipathd: sdag [66:0]: path added to devmap mpathiw
Thank you,
Ilan Steinberg
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