On the MDS the filesystem starts and being managed but the volume does not mount and returns in /var/log/messages:
- mount.cvfs: Can´t mount filesystem ‘snfs1’: Device or resource busy—System log may contain additional information
And in dmesg:
- CvOpenOnePath: Open Failed, disk <test123> error 6 device </dev/sdan>—Could not mount filesystem snfs1, cvfs error ‘File is busy’ (6)
Disable the multipath daemon (multipathed) and /etc/multipath.conf removed.
Do this (tested with RHEL 6.2, SNFS 4.3.0):
Might need to do this too
It is suggested to verify that the Linux Device-Mapper Multipath (DMMultipath) rpms are removed from the system.
# rpm -qa | grep multipath
# rpm -e device-mapper-multipath
If the above multipath method does not work, check mdadm to see if it is using the StorNext LUNs and consequently blocking it from StorNext. Except from ticket #19711 "We have resolved the issue by renaming the md-raid udev rule file, and therefore stoping it from auto starting mdadm on bootup if raid superblocks are discovered"
See ticket #24659 for case notes.
Quantum Knowledge Base article, download the .pdf file below.