We are running Xen with Debian Squeeze and have noticed on about 3-4
occasions int he past few months that a VM require a hard reboot(destroy)
would become un-bootable. I believe we have identified the cause as the
logical volume being stuck open. I''m looking at one right now(the VM
has
been booted on another hypervisor) and the device mapper open count is 1
for both the main disk and the swap disk. I can''t find it in use
anywhere. It''s not mounted, no processes are using it, etc. This is
exactly how LV''s in use by VM''s appear( open but nothing
showing up as
using it ). Has anyone seen this behavior? The only fix we have currently
is to eventually reboot the hypervisor :/
Thanks,
Greg
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