[Bug 644489] Re: constantly changes /dev/disk/by-id/{scsi, wwn}-* LUN symlinks with multipathing

[Peter Petrakis]

@ Martin

fix verified, no udev change events generated.

root at kickseed:~# udevadm monitor
monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent
^Z
[1]+  Stopped                 udevadm monitor
root at kickseed:~# bg
[1]+ udevadm monitor &
root at kickseed:~# apt-cache policy multipath-tools
multipath-tools:
  Installed: 0.4.8-14ubuntu10.1
  Candidate: 0.4.8-14ubuntu10.1
  Version table:
 *** 0.4.8-14ubuntu10.1 0
        500 http://us.archive.ubuntu.com/ubuntu/ natty-proposed/main Packages
        100 /var/lib/dpkg/status
     0.4.8-14ubuntu10 0
        500 http://10.229.0.1/enablement/lucid-mpio-ubuntu/ lucid/main Packages
     0.4.8-14ubuntu4 0
        500 http://us.archive.ubuntu.com/ubuntu/ lucid/main Packages
root at kickseed:~# 
root at kickseed:~# /sbin/mpath_prio_netapp /dev/sda
SCSI error
- SCSI CDB: 0xc0 0x00 0x01 0x0a 0x98 0x0a 0x41 0x80 0x00 0x00 
- masked_status=0x01, host_status=0x00, driver_status=0x08
- SCSI sense data: 0x70 0x00 0x05 0x00 0x00 0x00 0x00 0x0c 0x00 0x00 0x00 0x00 0x20 0x00 0x00 0x00 0x00 0x00 0x00 0x00 
SCSI error
- SCSI CDB: 0x12 0x01 0xc1 0x00 0x80 0x00 
- masked_status=0x01, host_status=0x00, driver_status=0x08
- SCSI sense data: 0x70 0x00 0x05 0x00 0x00 0x00 0x00 0x0c 0x00 0x00 0x00 0x00 0x24 0x00 0x00 0x00 0x00 0x00 0x00 0x00 
4
root at kickseed:~# 
root at kickseed:~# 
root at kickseed:~# /sbin/mpath_prio_netapp /dev/sdb
SCSI error
- SCSI CDB: 0xc0 0x00 0x01 0x0a 0x98 0x0a 0x41 0x80 0x00 0x00 
- masked_status=0x01, host_status=0x00, driver_status=0x08
- SCSI sense data: 0x70 0x00 0x05 0x00 0x00 0x00 0x00 0x0c 0x00 0x00 0x00 0x00 0x20 0x00 0x00 0x00 0x00 0x00 0x00 0x00 
SCSI error
- SCSI CDB: 0x12 0x01 0xc1 0x00 0x80 0x00 
- masked_status=0x01, host_status=0x00, driver_status=0x08
- SCSI sense data: 0x70 0x00 0x05 0x00 0x00 0x00 0x00 0x0c 0x00 0x00 0x00 0x00 0x24 0x00 0x00 0x00 0x00 0x00 0x00 0x00 
4
root at kickseed:~# /sbin/mpath_prio_emc /dev/sdb
query command indicates error0
root at kickseed:~# 
root at kickseed:~# 
root at kickseed:~# /sbin/mpath_prio_emc /dev/sda
query command indicates error0
root at kickseed:~# 
root at kickseed:~# 
root at kickseed:~# jobs
[1]+  Running                 udevadm monitor &

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https://bugs.launchpad.net/bugs/644489

Title:
  constantly changes /dev/disk/by-id/{scsi,wwn}-* LUN symlinks with
  multipathing

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