[Bug 1197448] Re: having multipath-tools installed prevents mounting of USB card reader

[Peter Petrakis]

multipath-tools will grab any devices that are not excluded by the filtering directives in
multipath.conf. It's a lot like lvm.conf. The operating system has no idea what these devices
will be used for, you must direct it explicitly.

https://help.ubuntu.com/lts/serverguide/multipath-dm-multipath-config-
file.html#multipath-config-blacklist

closing, support issue.

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

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Title:
  having multipath-tools installed prevents mounting of USB card reader

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

Bug description:
  I have multipath-tools installed on my thinkpad to experiment with an
  iscsi install we have at work.

  Today I tried to mount an SD card inserted into a Transcend TS-RDF8K
  reader. No go either from KDE or the command line:

  armalota at armalota-thinkpad:~$ sudo mount -t vfat /dev/sdc1 /tmp/mount
  mount: /dev/sdc1 already mounted or /tmp/mount busy

  
  dmesg says:
  [55808.061841] sd 13:0:0:1: [sdc] 31116288 512-byte logical blocks: (15.9 GB/14.8 GiB)
  [55808.064061] sd 13:0:0:1: [sdc] Write Protect is off
  [55808.064071] sd 13:0:0:1: [sdc] Mode Sense: 21 00 00 00
  [55808.066184] sd 13:0:0:1: [sdc] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
  [55808.071312] sd 13:0:0:0: [sdb] Attached SCSI removable disk
  [55808.073515] sd 13:0:0:2: [sdd] Attached SCSI removable disk
  [55808.089075]  sdc: sdc1
  [55808.095418] sd 13:0:0:1: [sdc] Attached SCSI removable disk
  [55808.335453] device-mapper: table: 252:2: multipath: error getting device
  [55808.335463] device-mapper: ioctl: error adding target to table

  
  I google that error, find this page:
  http://forum.ubuntu.ru/index.php?topic=206829.45

  Following the suggestion therein, I purged multipath-tools, replugged
  the reader, now I'm back in fine shape - able to mount my SD card to
  my heart's content.

  What will help debug this further?

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: multipath-tools 0.4.9-3ubuntu5
  ProcVersionSignature: Ubuntu 3.2.0-48.74-generic 3.2.46
  Uname: Linux 3.2.0-48-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.0.1-0ubuntu17.3
  Architecture: amd64
  Date: Wed Jul  3 10:24:16 2013
  InstallationMedia: Ubuntu-Server 11.10 "Oneiric Ocelot" - Release amd64 (20111011)
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: multipath-tools
  UpgradeStatus: No upgrade log present (probably fresh install)

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