On systemboot when /dev/sdb1 should be mounted following messages were displayed 36 times "device-mapper: : dm-linear: Device lookup failed"
"device-mapper: error adding target to table". If i tried to manually mount /dev/sdb1 the message was something like "/dev/sdb1 already mounted or /<target> busy", even though nothing was written to /etc/mtab and I tried different <target> I hope this was what you wanted, if further info would help I'll gladly do what I can to get it.
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