[linux-lvm] problem with LVM and fstab...bug?

Armen Babikyan armenb at static.net
Fri Nov 26 07:33:14 UTC 2004


I am seeing unexpected behavior with getting LVM drives to 
automatically mount when I boot my machine.  The expected behavior 
works for one LV but not the other.  I specified these lines in my 

/dev/mapper/vg0-www    /www    ext3    rw                      0       2
/dev/mapper/vg0-uml   /uml    ext3    rw                      0       2

These entries didn't work, so I thought I'd try these next two lines:

/dev/vg0/www    /www    ext3    rw                      0       2
/dev/vg0/uml   /uml    ext3    rw                      0       2

Oddly enough, the uml disk mounts on bootup, while the www one does 
not!  Is it just me, or is this chain of events, rather unexpectedly 

# umount /uml
# mount /dev/vg0/www
mount: wrong fs type, bad option, bad superblock on /dev/vg0/www,
or too many mounted file systems
# ls -al /dev/vg0/www
lrwx------ 1 root root 19 Nov 26 01:29 /dev/vg0/www -> 
# mount /dev/mapper/vg0-www /www


# mount /dev/vg0/uml

After this, both drives are mounted:

# df
Filesystem           1K-blocks      Used Available Use% Mounted on
[my other partitions]
/dev/mapper/vg0-www   30237648  10572760  18128888  37% /www
/dev/mapper/vg0-uml   10079084    945240   8621844  10% /uml

I am running Linux 2.6.8 on an Athlon with LVM on top of software 
RAID5.  Both partitions were created with mkfs -t ext3 (i.e. no special 
options...at least...I don't remember using any special options...).  I 
uncommented the "uml" line from /etc/fstab and rebooted, and saw the 
same sort of behavior.  Any ideas?  Feel free to email me for more 

[side question: why is there a symbolic link from /dev/X/Y to 
/dev/mapper/X-Y anyway?]

Any and all advice is greatly appreciated!


   - Armen

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