[Bug 1427859] Comment bridged from LTC Bugzilla

[bugproxy]

------- Comment From mauricfo at br.ibm.com 2015-03-11 12:50 EDT-------
FYI..

Some distros change the multipath user_friendly_names wholedisks
to be mpath[a-z]+ rather than mpath[0-9]+.

This seems intentional :) and takes away the disk-partition separator.

[...] the name of a multipath device is of the form mpathn.
For the [...] release, n is an alphabetic character,
so that the name of a multipath device might be // mpatha or mpathb. //
In previous releases, n was an integer.

It's a distro design decision.
It's an interesting conversation, but requires time, since it introduces some level of disruption on userspace.

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to multipath-tools in Ubuntu.
https://bugs.launchpad.net/bugs/1427859

Title:
  ISST-SAN:Need a common format for partition listing using
  kpartx,fdisk.distrib and ls -l

Status in multipath-tools package in Ubuntu:
  New

Bug description:
  == Comment: #0 - LEKSHMI C. PILLAI <lekshmi.cpillai at in.ibm.com> - 2015-02-25 09:02:18 ==
  This is a KVM guest with Ubuntu 15.04.

  I am facing issues with format with partition listing using different
  commands

  In zap06 I created partitions on mpath29 using fdisk.distrib

  Before partition creation:

  root at zap06:/dev/mapper# fdisk.distrib  -l /dev/mapper/mpath29---------->
  Disk /dev/mapper/mpath29: 15 GiB, 16106127360 bytes, 31457280 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 512 bytes
  I/O size (minimum/optimal): 512 bytes / 512 bytes

  root at zap06:/dev/mapper# kpartx -r /dev/mapper/mpath29--------------->
  root at zap06:/dev/mapper# ls -l mpath29--------------------------------->
  lrwxrwxrwx 1 root root 7 Feb 24 08:46 mpath29 -> ../dm-6
  root at zap06:/dev/mapper# 

  After Partition  creation:

  root at zap06:/dev/mapper# fdisk.distrib -l
  /dev/mapper/mpath29--------------->

  Disk /dev/mapper/mpath29: 15 GiB, 16106127360 bytes, 31457280 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 512 bytes
  I/O size (minimum/optimal): 512 bytes / 512 bytes
  Disklabel type: dos
  Disk identifier: 0xce509b1c

  Device                Boot    Start      End  Sectors Size Id Type
  /dev/mapper/mpath29p1          2048     2048        0   0B 83 Linux
  /dev/mapper/mpath29p2          4096 10489855 10485760   5G 83 Linux
  /dev/mapper/mpath29p3      10489856 20975615 10485760   5G 83 Linux

  root at zap06:/dev/mapper# kpartx -r /dev/mapper/mpath29
  mpath29p2 : 0 10485760 /dev/mapper/mpath29 4096--------------
  mpath29p3 : 0 10485760 /dev/mapper/mpath29 10489856-------------------

  But instead of names like mpath29pX, the actual device nodes have
  names like mpath29-partX:

  root at zap06:/dev/mapper# ls -l /dev/mapper/mpath29*
  lrwxrwxrwx 1 root root       7 Feb 25 01:30 /dev/mapper/mpath29 -> ../dm-6
  brw-rw---- 1 root disk 252, 68 Feb 25 01:30 /dev/mapper/mpath29-part2
  brw-rw---- 1 root disk 252, 69 Feb 25 01:30 /dev/mapper/mpath29-part3
  root at zap06:/dev/mapper# 

  After that I created the filesystem on these partitions using the
  convention "mpath-part2".Its created successfully and I am able to
  mount it

  root at zap06:/dev/mapper# mount | grep "29"
  /dev/mapper/mpath29-part2 on /Fs29 type ext4 (rw)
  /dev/mapper/mpath29-part3 on /FS29_1 type xfs (rw)
  root at zap06:/dev/mapper# 

  Thanks
  Lekshmi

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/multipath-tools/+bug/1427859/+subscriptions