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Old 08-03-2004, 08:03 PM   #1
Registered: Mar 2004
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What is Loop Device Support?

Hi guys,

I got an error that my kernel does not have loop device support, what is it and how would I load or get it?

Old 08-03-2004, 08:22 PM   #2
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Loop device support allows you to mount files formatted with filesystems on your machine (done through a loopback device). To enable it, you'll have to build the appropriate kernel module and modprobe it into your system. The easiest way I know to do this is go to your Linux source tree, make xconfig (or menuconfig), select to configure loop device support as a module, make modules, and make modules_install. You may want to compile it into your kernel (not as a module) in which case see the threads here about recompiling your kernel.
Old 08-03-2004, 08:25 PM   #3
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Enable it under your kernel config.

# cd /usr/src/linux && make menuconfig

Then you will see the option under Device Drivers -> Misc -> Loopback support. Finally, recompile your kernel and move it to /boot. This is useful if you would like to mount an ISO cd image without having to burn it like this "mount -o loop /home/foo/foo.iso /mnt/loop" :-)

Kristian Hermansen
Old 08-03-2004, 08:36 PM   #4
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before you go doing anything as drastic as recompiling your kernel, make sure its not just that the module isnt loaded...

the module is called..... "loop" so load it with 'modprobe loop'
or, open your kernels config file, and search for the string 'LOOP'


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