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[Scott Moser <smoser@xxxxxxxxxx>]

related bug 1489959 filed when i tried to install wily on power8 system
today.

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https://bugs.launchpad.net/bugs/1474984

Title:
  installing multipath-tools 0.5.0 on trusty leaves the system unable to
  boot

Status in initramfs-tools package in Ubuntu:
  Triaged
Status in multipath-tools package in Ubuntu:
  New

Bug description:
  In order to test the fix for bug #1468897 on trusty on a POWER8 system
  (PowerNV mode), Mike installed the multipath-tools package from wily.
  This results in a system that fails to boot, dropping to the
  initramfs.  The reproducible failure is:

  Begin: Running /scripts/init-premount ... done.
  Begin: Mounting root file system ... Begin: Running /scripts/local-top ... Begin: Loading multipath modules ... Success: loaded module dm-multipath.
  Failure: failed to load module dm-emc.
  done.
  Begin: Discovering multipaths ... done.
  done.
  Gave up waiting for root device.  Common problems:
   - Boot args (cat /proc/cmdline)
     - Check rootdelay= (did the system wait long enough?)
     - Check root= (did the system wait for the right device?)
   - Missing modules (cat /proc/modules; ls /dev)
  ALERT!  /dev/mapper/mpath0-part2 does not exist.  Dropping to a shell!
  [  220.162333] hidraw: raw HID events driver (C) Jiri Kosina
  [  220.164232] usbcore: registered new interface driver usbhid
  [  220.164277] usbhid: USB HID core driver

  
  BusyBox v1.21.1 (Ubuntu 1:1.21.0-1ubuntu1) built-in shell (ash)
  Enter 'help' for a list of built-in commands.

  (initramfs)

  Debugging info:

  (initramfs) cat /proc/cmdline 
  root=/dev/mapper/mpath0-part2 ro
  (initramfs) /sbin/multipath -v 3; echo $?
  Jul 15 18:21:52 | libdevmapper version 1.02.99 (2015-06-20)
  Jul 15 18:21:52 | DM multipath kernel driver v1.7.0
  Jul 15 18:21:52 | loading /lib/multipath/libcheckdirectio.so checker
  Jul 15 18:21:52 | loading /lib/multipath/libprioconst.so prioritizer
  Jul 15 18:21:52 | sr0: blacklisted, udev property missing
  Jul 15 18:21:52 | sda: udev property SCSI_IDENT_LUN_T10 whitelisted
  Jul 15 18:21:52 | sda: not found in pathvec
  Jul 15 18:21:52 | sda: mask = 0x3f
  Jul 15 18:21:52 | sda: dev_t = 8:0
  Jul 15 18:21:52 | sda: size = 554287104
  Jul 15 18:21:52 | sda: vendor = IBM
  Jul 15 18:21:52 | sda: product = IPR-0   5EC25900
  Jul 15 18:21:52 | sdb: udev property SCSI_IDENT_LUN_T10 whitelisted
  Jul 15 18:21:52 | sdb: not found in pathvec
  Jul 15 18:21:52 | sdb: mask = 0x3f
  Jul 15 18:21:52 | sdb: dev_t = 8:16
  Jul 15 18:21:52 | sdb: size = 554287104
  Jul 15 18:21:52 | sdb: vendor = IBM
  Jul 15 18:21:52 | sdb: product = IPR-0   5EC25900
  Jul 15 18:21:52 | sdc: udev property SCSI_IDENT_LUN_T10 whitelisted
  Jul 15 18:21:52 | sdc: not found in pathvec
  Jul 15 18:21:52 | sdc: mask = 0x3f
  Jul 15 18:21:52 | sdc: dev_t = 8:32
  Jul 15 18:21:52 | sdc: size = 554287104
  Jul 15 18:21:52 | sdc: vendor = IBM
  Jul 15 18:21:52 | sdc: product = IPR-0   5EC25900
  Jul 15 18:21:52 | sdd: udev property SCSI_IDENT_LUN_T10 whitelisted
  Jul 15 18:21:52 | sdd: not found in pathvec
  Jul 15 18:21:52 | sdd: mask = 0x3f
  Jul 15 18:21:52 | sdd: dev_t = 8:48
  Jul 15 18:21:52 | sdd: size = 554287104
  Jul 15 18:21:52 | sdd: vendor = IBM
  Jul 15 18:21:52 | sdd: product = IPR-0   5EC25900
  Jul 15 18:21:52 | sde: udev property SCSI_IDENT_LUN_T10 whitelisted
  Jul 15 18:21:52 | sde: not found in pathvec
  Jul 15 18:21:52 | sde: mask = 0x3f
  Jul 15 18:21:52 | sde: dev_t = 8:64
  Jul 15 18:21:52 | sde: size = 554287104
  Jul 15 18:21:52 | sde: vendor = IBM
  Jul 15 18:21:52 | sde: product = IPR-0   5EC25900
  Jul 15 18:21:52 | sdf: udev property SCSI_IDENT_LUN_T10 whitelisted
  Jul 15 18:21:52 | sdf: not found in pathvec
  Jul 15 18:21:52 | sdf: mask = 0x3f
  Jul 15 18:21:52 | sdf: dev_t = 8:80
  Jul 15 18:21:52 | sdf: size = 554287104
  Jul 15 18:21:52 | sdf: vendor = IBM
  Jul 15 18:21:52 | sdf: product = IPR-0   5EC25900
  Jul 15 18:21:52 | sdg: udev property SCSI_IDENT_LUN_T10 whitelisted
  Jul 15 18:21:52 | sdg: not found in pathvec
  Jul 15 18:21:52 | sdg: mask = 0x3f
  Jul 15 18:21:52 | sdg: dev_t = 8:96
  Jul 15 18:21:52 | sdg: size = 554287104
  Jul 15 18:21:52 | sdg: vendor = IBM
  Jul 15 18:21:52 | sdg: product = IPR-0   5EC25900
  Jul 15 18:21:52 | sdh: udev property SCSI_IDENT_LUN_T10 whitelisted
  Jul 15 18:21:52 | sdh: not found in pathvec
  Jul 15 18:21:52 | sdh: mask = 0x3f
  Jul 15 18:21:52 | sdh: dev_t = 8:112
  Jul 15 18:21:52 | sdh: size = 554287104
  Jul 15 18:21:52 | sdh: vendor = IBM
  Jul 15 18:21:52 | sdh: product = IPR-0   5EC25900
  Jul 15 18:21:52 | loop0: blacklisted, udev property missing
  Jul 15 18:21:52 | loop1: blacklisted, udev property missing
  Jul 15 18:21:52 | loop2: blacklisted, udev property missing
  Jul 15 18:21:52 | loop3: blacklisted, udev property missing
  Jul 15 18:21:52 | loop4: blacklisted, udev property missing
  Jul 15 18:21:52 | loop5: blacklisted, udev property missing
  Jul 15 18:21:52 | loop6: blacklisted, udev property missing
  Jul 15 18:21:52 | loop7: blacklisted, udev property missing
  Jul 15 18:21:52 | ram0: blacklisted, udev property missing
  Jul 15 18:21:52 | ram1: blacklisted, udev property missing
  Jul 15 18:21:52 | ram10: blacklisted, udev property missing
  Jul 15 18:21:52 | ram11: blacklisted, udev property missing
  Jul 15 18:21:52 | ram12: blacklisted, udev property missing
  Jul 15 18:21:52 | ram13: blacklisted, udev property missing
  Jul 15 18:21:52 | ram14: blacklisted, udev property missing
  Jul 15 18:21:52 | ram15: blacklisted, udev property missing
  Jul 15 18:21:52 | ram2: blacklisted, udev property missing
  Jul 15 18:21:52 | ram3: blacklisted, udev property missing
  Jul 15 18:21:52 | ram4: blacklisted, udev property missing
  Jul 15 18:21:52 | ram5: blacklisted, udev property missing
  Jul 15 18:21:52 | ram6: blacklisted, udev property missing
  Jul 15 18:21:52 | ram7: blacklisted, udev property missing
  Jul 15 18:21:52 | ram8: blacklisted, udev property missing
  Jul 15 18:21:52 | ram9: blacklisted, udev property missing
  Jul 15 18:21:52 | unloading const prioritizer
  Jul 15 18:21:52 | unloading directio checker
  1
  (initramfs) cat /etc/multipath/bindings 
  # This file was created by curtin while installing the system.
  mpath0 1IBM     IPR-0   5EC2590000000080
  # End of content generated by curtin.
  # Everything below is maintained by multipath subsystem.
  mpath1 1IBM     IPR-0   5EC2590000000060
  mpath2 1IBM     IPR-0   5EC2590000000040
  mpath3 1IBM     IPR-0   5EC2590000000020
  (initramfs) cat /etc/multipath.conf 
  # This file was created by curtin while installing the system.
  defaults {
  	user_friendly_names yes
  }
  (initramfs)

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