[linux-lvm] On-disk and LVM internal metadata representation

Dave Wysochanski dwysocha at redhat.com
Mon Mar 5 16:12:23 UTC 2007

On Mon, 2007-03-05 at 04:54 -0700, Nallammai S wrote:
> Hi,
> Whats the difference between on-disk metadata and LVM  internal representation? How does LVM map between these two representations?
> Thanks in advance.
> Nallammai.S 

It is different for LVM1 vs LVM2.

- text-based on-disk metadata
- format-specific code in lib/format_text

- binary on-disk metadata
- format-specific code in lib/format1

If you read the import*.[ch] and export*.[ch] files in the format
specific directories you will get an understanding of the mapping.  I
also found following the label_read() function to be helpful.

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