34 lines
1.4 KiB
ReStructuredText
34 lines
1.4 KiB
ReStructuredText
mount: device or resource busy after enabling multipath
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#######################################################
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:date: 2013-02-19T23:09:05Z
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:category: blog
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:tags: linux,heartbeat-cluster
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:url: blog/2013/2/19/mount-device-or-resource-busy-after-enabling-multipath.html
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:save_as: blog/2013/2/19/mount-device-or-resource-busy-after-enabling-multipath.html
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:status: published
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:author: Gergely Polonkai
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We have a heartbeat cluster with two nodes. It has been running for several months without
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problems. The shared storage is on an IBM DS3400, on which we have a large volume formatted with
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ext4.
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Today I decided to reboot the active node for security reasons. So I’ve switched to the passive
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node, which failed at the first step: it was unable to mount the storage (``/dev/sda1``). After
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whining for a few moments, I tried to mount it by hand, which told me
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.. code-block:: log
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/dev/sda1 already mounted or /data is busy
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I’ve quickly made sure that none of that was true. After checking this-and-that, it turned out
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that the passive node had ``multipathd`` running, so I looked under ``/dev/mapper``, and found two
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symlinks there, ``<long-long WWN>`` and ``<long-long WWN>-part1``. As the partition table and the
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disk size was the same as on ``/dev/sda``, I tried to
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.. code-block:: shell
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mount /dev/<long-long WWN>-part1 /data
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and voilà! It worked like charm!
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