Xen 3.0 From Binaries In Ubuntu 6.06 LTS (Dapper Drake) mount errors - EVMS?

[voipfc]

After installing Xen 3.0.3 on a Ubuntu 6.06 system trying to mount partitions on the second hard disk fails.

[admin@server ~] mount /dev/sdb1 /backup1
mount: /dev/sdb1 already mounted or /backup1 busy

Googling shows that it may be lvm or device mapper related. EVMS also showed up as mentioned in the howto's comments.

How can disable I EVMS to see if it will fix the problem?

[falko]

If you know the exact name of the module, you can remove it like this:

modprobe -r module_name

If it's listed in /etc/modules, comment it out so that it won't be loaded the next time you boot the system.

[voipfc]

EVMS is not installed on my system and after googling a bit I found this thread http://www.linuxquestions.org/questi...d.php?t=494987.

What does the dm_mod/devicemapper do and how can I detect if it is actually used by my system. It shows up when I run lsmod.

[falko]

I think it's used by LVM. You shouldn't remove it if you use LVM.

[voipfc]

I have eventually been able to fix the problem by disabling the dm_mod module in modules.dep

I am not using raid or dm_mod?

Are there any downsides if dm_mod is disabled?

[falko]

Do you see any error messages in the

dmesg

output? If not, everything should be ok.