[linux-lvm] which volume is a file on?

[Zarthan South]

Thanks
I was starting to write some scripts and thought if there was a tool to
determine which LV a file was on it would eliminate a some writing.

On Wed, Jun 11, 2008 at 3:33 AM, Bryn M. Reeves <breeves at redhat.com> wrote:

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> Zarthan South wrote:
> > Is there a utility or a simple way to determine which volume a file is
> located on.
>
> That's more of a file system question than an LVM question and it's no
> different than any other type of device: find the mount point of the
> file system containing the file and then consult /proc/mounts or the
> output of the mount command to determine what LV the file is on.
>
> If you want to know where the data blocks are located physically you'll
> need to do a bit more work: find the inode location, determine what
> block ranges are allocated to it and then figure out how they map to
> physical device regions using e.g. lvdisplay --maps. The details for
> this step depend on the file system type you are using. For ext2/3 you
> can determine the physical location of a file's data blocks using degbugfs.
>
> Regards,
> Bryn.
>
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