Public bug reported:
I have 4 servers running the latest 16.04 updates from the development
branch (as of right now).
Each server is connected to NetApp storage using iscsi software
initiator. There are a total of 56 volumes spread across two NetApp
arrays. Each volume has 4 paths available to it which are being managed
by device mapper.
While running IO to the iscsi targets my system log is flooded with
messages that look like this:
Apr 8 11:48:36 ICTM1612S02H2 systemd[1]:
dev-disk-by\x2did-scsi\x2d360080e500029092400008d765605fa52.device: Dev
dev-disk-by\x2did-scsi\x2d360080e500029092400008d765605fa52.device appeared
twice with different sysfs paths
/sys/devices/platform/host21/session8/target21:0:0/21:0:0:9/block/sdbh and
/sys/devices/virtual/block/dm-59
Apr 8 11:48:36 ICTM1612S02H2 systemd[1]:
dev-disk-by\x2did-wwn\x2d0x60080e500029092400008d765605fa52.device: Dev
dev-disk-by\x2did-wwn\x2d0x60080e500029092400008d765605fa52.device appeared
twice with different sysfs paths
/sys/devices/platform/host19/session6/target19:0:0/19:0:0:9/block/sdcd and
/sys/devices/virtual/block/dm-59
Apr 8 11:48:36 ICTM1612S02H2 systemd[1]:
dev-disk-by\x2did-scsi\x2d360080e50002909240000993956f4a1cb.device: Dev
dev-disk-by\x2did-scsi\x2d360080e50002909240000993956f4a1cb.device appeared
twice with different sysfs paths
/sys/devices/platform/host21/session8/target21:0:0/21:0:0:121/block/sdej and
/sys/devices/virtual/block/dm-37
Apr 8 11:48:36 ICTM1612S02H2 systemd[1]:
dev-disk-by\x2did-wwn\x2d0x60080e50002909240000993956f4a1cb.device: Dev
dev-disk-by\x2did-wwn\x2d0x60080e50002909240000993956f4a1cb.device appeared
twice with different sysfs paths
/sys/devices/platform/host19/session6/target19:0:0/19:0:0:121/block/sdfk and
/sys/devices/virtual/block/dm-37
Apr 8 11:48:36 ICTM1612S02H2 systemd[1]:
dev-disk-by\x2did-scsi\x2d360080e500029092400008d805605fa8b.device: Dev
dev-disk-by\x2did-scsi\x2d360080e500029092400008d805605fa8b.device appeared
twice with different sysfs paths
/sys/devices/platform/host20/session7/target20:0:0/20:0:0:19/block/sdel and
/sys/devices/virtual/block/dm-50
Apr 8 11:48:36 ICTM1612S02H2 systemd[1]:
dev-disk-by\x2did-wwn\x2d0x60080e500029092400008d805605fa8b.device: Dev
dev-disk-by\x2did-wwn\x2d0x60080e500029092400008d805605fa8b.device appeared
twice with different sysfs paths
/sys/devices/platform/host19/session6/target19:0:0/19:0:0:19/block/sdew and
/sys/devices/virtual/block/dm-50
Apr 8 11:48:36 ICTM1612S02H2 systemd[1]:
dev-disk-by\x2did-scsi\x2d360080e500029092400008d785605fa5e.device: Dev
dev-disk-by\x2did-scsi\x2d360080e500029092400008d785605fa5e.device appeared
twice with different sysfs paths
/sys/devices/platform/host18/session5/target18:0:0/18:0:0:11/block/sdcb and
/sys/devices/virtual/block/dm-35
Apr 8 11:48:36 ICTM1612S02H2 systemd[1]:
dev-disk-by\x2did-wwn\x2d0x60080e500029092400008d785605fa5e.device: Dev
dev-disk-by\x2did-wwn\x2d0x60080e500029092400008d785605fa5e.device appeared
twice with different sysfs paths
/sys/devices/platform/host20/session7/target20:0:0/20:0:0:11/block/sdcj and
/sys/devices/virtual/block/dm-35
Apr 8 11:48:36 ICTM1612S02H2 systemd[1]:
dev-disk-by\x2did-scsi\x2d360080e500029092400008d7a5605fa6a.device: Dev
dev-disk-by\x2did-scsi\x2d360080e500029092400008d7a5605fa6a.device appeared
twice with different sysfs paths
/sys/devices/platform/host20/session7/target20:0:0/20:0:0:13/block/sdcw and
/sys/devices/virtual/block/dm-44
Apr 8 11:48:36 ICTM1612S02H2 systemd[1]:
dev-disk-by\x2did-wwn\x2d0x60080e500029092400008d7a5605fa6a.device: Dev
dev-disk-by\x2did-wwn\x2d0x60080e500029092400008d7a5605fa6a.device appeared
twice with different sysfs paths
/sys/devices/platform/host21/session8/target21:0:0/21:0:0:13/block/sdcf and
/sys/devices/virtual/block/dm-44
It seems that systemd doesn't know what to do with dm devices and its
"disk-by" simlinks.
This is being tracked in NetApp bug tracker CQ number 860309.
** Affects: ubuntu
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1569930
Title:
Continuous messages from systemd: dm disk appears twice
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