loop devices snippets

Fix for "Failed to find an unused loop device" when using xen

Tagged xen, debian, xen source, loop devices  Languages bash

If you use Xen and get an error "Failed to find an unused loop device" when you try to create a guest then you are probably using disk images and have run out of loop devices. Each guest uses at least two loop devices. Modify (or create) a file called /etc/modprobe.d/local-loop and add this line:

options loop max_loop=64

Use a number suitable for your needs. With 64 loop devices you can run up to 32 guests on your host, assuming you aren't using loop devices for any other purposes.