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Re: [Xen-users] Backup; mount domU FS RO?
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| Subject: | Re: [Xen-users] Backup; mount domU FS RO? |
| From: | Andy Smith <andy@xxxxxxxxxxxxxx> |
| Date: | Sun, 18 Dec 2005 21:34:05 +0000 |
| Delivery-date: | Sun, 18 Dec 2005 21:36:40 +0000 |
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On Sun, Dec 18, 2005 at 09:26:12PM +0100, Ralf Folkerts wrote: > I found some warnings that Filesystems may not be mounted RW by more > than one domain / system (makes sense when they don't "know" about each > other). However, are there any issues mounting a Filesystem Read-Only, > then have it being backed-up by Bacula and then unmount it? The short answer is yes, it's almost as bad as mounting it RW twice. Your dom0 kernel will make some assumptions about the read-only nature of the filesystem which will be invalidated when the domU changes it underneath. You need a cluster filesystem susch as GFS or OCFS2 to do this.
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