Fedora xen - Jun 2007 - read-only acces to a filesystem on a xen guest

Hi,
Which is the best way to acces a the data on a live xen guest to do
backups?

It''s safe enought to mount it as read-only? I supose it is not,
isn''t it?

If it''s on a logical volume of LVM I could do a snapshot. Would it be
consistent with the filesystem without being mounted on the dom0? So LVM
is smart enought to tell to the xen guest to flush all cache buffers
before to do the snapshot?

Thanks,
Jordi

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