[Bug 368491] Re: Cannot mount partition on iSCSI LUN

[alzibub]

This is not a bug, please close this ticket.

When the multipath-tools package is installed, the device-mapper takes
exclusive control of new disks - provided they are not blacklisted in
multipath.conf.  It does this so that it can create a "multipath" device
node.   This is so that when a disk is discovered with the same wwid it
can be added under the "multipath" device node.

For example, if the iscsi initiator logs in to  a target and /dev/sdg is
created, this will be taken by device-mapper which will then create a
node under /dev/mapper/ corresponding to /dev/sdg.  If the iscsi
initiator logs into another target and /dev/sdh is created, and this has
the same wwid as /dev/sdg, then device-mapper recognises that they are
alternate paths to the same LUN and attaches /dev/sdh to the same node
under /dev/mapper.

So the solution is just to try and mount the node under /dev/mapper
instead of the /dev/sd* node, if multipath-tools are installed.

Sorry for the confusion - I didn't realise when I raised this bug that I
had multipath-tools installed.  Or even what multipath-tools was for!

Alex

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Cannot mount partition on iSCSI LUN
https://bugs.launchpad.net/bugs/368491
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