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

[Andrew M.]

Public bug reported:

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)

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


** Tags: amd64 apport-bug precise

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

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