[Bug 311179] Re: libparted does not return the correct devices to ubiquity

[Phillip Susi]

This is a bug in dmraid.patch.  It identifies the raid10 as a partition
because its dependencies are also device-mapper devices, and so excludes
it.  I have an idea on how to fix this.


** Changed in: parted (Ubuntu)
   Importance: Undecided => Medium

** Changed in: parted (Ubuntu)
       Status: New => In Progress

** Changed in: parted (Ubuntu)
     Assignee: (unassigned) => Phillip Susi (psusi)

** Summary changed:

- libparted does not return the correct devices to ubiquity
+ libparted hides fakeraid raid10 disks

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Title:
  libparted hides fakeraid raid10 disks

Status in “parted” package in Ubuntu:
  In Progress

Bug description:
  Binary package hint: libparted1.8-9

  I've installed ubuntu 8.10 on a fakeraid raid10-set.

  I booted using the live-cd and then installed dmraid manually
  My raid-set was detected correctly and showed up in /dev/mapper.

  Then I started ubiquity, but the installer did not show my
  read10-device. He did show me the 2 raid0-set that are part of the
  raid10-set. ubiquity is using parted_devices and parted_devices is
  using libparted.

  When I run parted_devices manually I get the following results:
  /dev/sda	500107862016	ATA ST3500320AS
  /dev/sdb	500107862016	ATA ST3500320AS
  /dev/sdc	500107862016	ATA ST3500320AS
  /dev/sdd	500107862016	ATA ST3500320AS
  /dev/mapper/isw_bfgggbebhf_diskset-0	1000210694144	Linux device-mapper
  /dev/mapper/isw_bfgggbebhf_diskset-1	1000210694144	Linux device-mapper

  I would expect the following result:
  /dev/mapper/isw_bfgggbebhf_diskset	1000210694144	Linux device-mapper

  It looks like that the patch parted-dmraid.dpatch in libparted is
  causing the problems. I removed this patch, build and installed
  libparted and then my raid10-device showed up.

  I think that the new function _is_dmraid_major is not correct.
  isw_bfgggbebhf_diskset is the slave of my partitions, but still is the
  major device.

  output of /dev/mapper:
  crw-rw---- 1 root root  10, 60 2008-12-24 11:04 control
  brw-rw---- 1 root disk 254,  0 2008-12-24 11:04 isw_bfgggbebhf_diskset
  brw-rw---- 1 root disk 254,  2 2008-12-24 11:04 isw_bfgggbebhf_diskset-0
  brw-rw---- 1 root disk 254,  3 2008-12-24 11:04 isw_bfgggbebhf_diskset1
  brw-rw---- 1 root disk 254,  1 2008-12-24 11:04 isw_bfgggbebhf_diskset-1
  brw-rw---- 1 root disk 254,  4 2008-12-24 11:04 isw_bfgggbebhf_diskset3
  brw-rw---- 1 root disk 254,  6 2008-12-24 11:04 isw_bfgggbebhf_diskset5
  brw-rw---- 1 root disk 254,  7 2008-12-24 11:04 isw_bfgggbebhf_diskset6

  contents of /sys/block/dm*/slaves/
  dm-0/slaves/:
  dm-1  dm-2

  dm-1/slaves/:
  sdb  sdd

  dm-2/slaves/:
  sda  sdc

  dm-3/slaves/:
  dm-0

  dm-4/slaves/:
  dm-0

  dm-6/slaves/:
  dm-0

  dm-7/slaves/:
  dm-0

  version of libparted: 1.8.8.git.2008.03.24-7ubuntu7

  
  regards,
  Theo

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