[Bug 1030040] Re: multipath-tools create duplicate device

[Peter Petrakis]

Hi Vincent,

Could you please provide?

1) any lvm config file or other "stacked" block device configurations
2) if lvm: vgscan -vvv 2>&1 | tee > vgscan.log
3) multipath.conf
4) echo 'show config' | multipathd -k > multipathd-runtime-config.log
5) dmsetup table -v > dmsetup.log
6) multipath -v4 -ll > multipath.log
7) system logs

put that together into a tarball with a datetime stamp and attach it to
the bug.

To assist in debugging. Please stop multipathd, flush all paths and then only
run multipath client so we can observe how the paths are created.

0) service multipath-tools stop
1) multipath -F  # check that paths have been deleted
2) multipath -v4 > multipath-create-all-no-daemon.log
3) dmsetup table -v > dmsetup-no-daemon.log
3) multipath -ll > multipath-normal-listing.log

attach all this in another tarball appropriately labelled and attach.

BTW, is your hardware handler actually installed? lsmod | grep scsi_dh

Help me understand why your SD names have 'lapped" to use an additional character,
are you performing a lot of hotplug or are there that many disks?  an lsscsi -l output
would be nice.

Thanks.

** Changed in: multipath-tools (Ubuntu)
       Status: New => Incomplete

** Changed in: multipath-tools (Ubuntu)
     Assignee: (unassigned) => Peter Petrakis (peter-petrakis)

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https://bugs.launchpad.net/bugs/1030040

Title:
  multipath-tools create duplicate device

Status in “multipath-tools” package in Ubuntu:
  Incomplete

Bug description:
  I am testing Ubuntu12.04LTS and find  multipath-tools could create
  duplicate device on same device.

  root at Linux51:~# lsb_release -a
  No LSB modules are available.
  Distributor ID: Ubuntu
  Description:    Ubuntu 12.04 LTS
  Release:        12.04
  Codename:       precise

  
  root at Linux51:~# apt-cache policy multipath-tools
  multipath-tools:
    Installed: 0.4.9-3ubuntu5
    Candidate: 0.4.9-3ubuntu5
    Version table:
   *** 0.4.9-3ubuntu5 0


  root at Linux51:~# multipath -ll mpath35
  mpath35 (3600601601c102900cce9d9e2ae3fe011) dm-19 DGC,VRAID
  size=12G features='1 queue_if_no_path' hwhandler='1 emc' wp=rw
  |-+- policy='round-robin 0' prio=1 status=active
  | |- 5:0:3:10 sdau 66:224 active ready running
  | `- 6:0:3:10 sddg 70:224 active ready running
  `-+- policy='round-robin 0' prio=0 status=enabled
    |- 5:0:2:10 sdr  65:16  active ready running
    `- 6:0:2:10 sdcd 69:16  active ready running
  root at Linux51:~# multipath -ll mpath36
  mpath36 (3600601601c102900d4e9d9e2ae3fe011) dm-20 DGC,VRAID
  size=12G features='1 queue_if_no_path' hwhandler='1 emc' wp=rw
  |-+- policy='round-robin 0' prio=1 status=active
  | |- 5:0:3:10 sdau 66:224 active ready running
  | `- 6:0:3:10 sddg 70:224 active ready running
  `-+- policy='round-robin 0' prio=0 status=enabled
    |- 5:0:2:10 sdr  65:16  active ready running
    `- 6:0:2:10 sdcd 69:16  active ready running

  after useing multipath -f 3600601601c102900cce9d9e2ae3fe011,  the
  mpath35 disapper, even reboot host

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