[Bug 1386637] [NEW] multipath shows non-mpath disks as being multipath

[Launchpad Bug Tracker]

You have been subscribed to a public bug:

Problem Description
======================
non-multpath disks are classified as multipath after the multipath-tools package is installed.

---uname output---
Linux uu04g1 3.16.0-21-generic #28-Ubuntu SMP Mon Oct 6 15:57:32 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux
 
Machine Type = Tuleta pKVM guest 
 
Steps to Reproduce
=========================
1) Create a guest with an unused, non-mpath disk (not the install disk) (a qemu img file is fine).  
2) apt-get install multipath-tools.  
3) multipath -ll. 
4)  Note that  your file backed disks are showing up as mpath disks.
 

Userspace tool common name: multipath 
The userspace tool has the following bit modes: 64 
 
System Dump Info:
  The system is not configured to capture a system dump.

Userspace rpm: multipath-tools 
Userspace tool obtained from project website:  multipath-tools v0.4.9 (05/33, 2016) 
 

== Comment: #1 - Edward R. Cheslek <echeslak at us.ibm.com> - ==
root at uu04g1:~# multipath -ll
0QEMU    QEMU HARDDISK   drive-scsi0-0-1-0 dm-0 QEMU,QEMU HARDDISK
size=20G features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
  `- 0:0:1:0 sdb 8:16 active ready running
0QEMU    QEMU HARDDISK   drive-scsi0-0-2-0 dm-1 QEMU,QEMU HARDDISK
size=20G features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
  `- 0:0:2:0 sdc 8:32 active ready running
root at uu04g1:~# lsblk
NAME                                              MAJ:MIN RM  SIZE RO TYPE  MOUNTPOINT
sda                                                 8:0    0   20G  0 disk
??sda1                                              8:1    0    7M  0 part
??sda2                                              8:2    0 19.1G  0 part  /
??sda3                                              8:3    0  896M  0 part  [SWAP]
sdb                                                 8:16   0   20G  0 disk
??0QEMU\x20\x20\x20\x20QEMU\x20HARDDISK\x20\x20\x20drive-scsi0-0-1-0
                                                  252:0    0   20G  0 mpath
sdc                                                 8:32   0   20G  0 disk
??0QEMU\x20\x20\x20\x20QEMU\x20HARDDISK\x20\x20\x20drive-scsi0-0-2-0
                                                  252:1    0   20G  0 mpath
root at uu04g1:~#
root at uu04g1:~# lsscsi
[0:0:0:0]    disk    QEMU     QEMU HARDDISK    2.0.  /dev/sda
[0:0:1:0]    disk    QEMU     QEMU HARDDISK    2.0.  /dev/sdb
[0:0:2:0]    disk    QEMU     QEMU HARDDISK    2.0.  /dev/sdc

== Comment: #2 - Edward R. Cheslek <echeslak at us.ibm.com> - 2014-10-08 22:27:09 ==
This is the xml file of the affected guest.  Please note that all disks are file backed.

root at uu04g1:~# multipath -l
0QEMU    QEMU HARDDISK   drive-scsi0-0-1-0 dm-0 QEMU,QEMU HARDDISK
size=20G features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=-1 status=active
  `- 0:0:1:0 sdb 8:16 active undef running
0QEMU    QEMU HARDDISK   drive-scsi0-0-2-0 dm-1 QEMU,QEMU HARDDISK
size=20G features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=-1 status=active
  `- 0:0:2:0 sdc 8:32 active undef running

root at uu04g1:~# multipath -v2
root at uu04g1:~#

** Affects: multipath-tools (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: architecture-ppc64le bot-comment bugnameltc-117319 severity-high targetmilestone-inin---
-- 
multipath shows non-mpath disks as being multipath
https://bugs.launchpad.net/bugs/1386637
You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to multipath-tools in Ubuntu.