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[root@hostname wmeadmin]# mount -amount: wrong fs type, bad option, bad superblock on /dev/sdb1,
missing codepage or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
[root@hostname wmeadmin]# mount/dev/mapper/VolGroup00-LogVol00 on / type ext3 (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
/dev/sda1 on /boot type ext3 (rw)
tmpfs on /dev/shm type tmpfs (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
You cannot mount a device (/dev/sdb); only partitions can be mounted (/dev/sdb1, /dev/sdb2, ...) But mount is reporting that there is a problem with your partition /dev/sdb1. We see this when you try to mount all of the partitions listed in fstab. It looks like the last time the partition was mounted or unmounted, it became corrupted. Did you inspect the system logs (run dmesg or view /var/log/messages), as the error messages suggested?
You can try to test & fix it with fsck.
There is nothing wrong with using a separate partition for the /opt tree, if that is the way you want your filesystem arranged.