* [linux-lvm] On-disk and LVM internal metadata representation
@ 2007-03-05 11:54 Nallammai S
2007-03-05 16:12 ` Dave Wysochanski
0 siblings, 1 reply; 2+ messages in thread
From: Nallammai S @ 2007-03-05 11:54 UTC (permalink / raw)
To: linux-lvm
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
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [linux-lvm] On-disk and LVM internal metadata representation
2007-03-05 11:54 [linux-lvm] On-disk and LVM internal metadata representation Nallammai S
@ 2007-03-05 16:12 ` Dave Wysochanski
0 siblings, 0 replies; 2+ messages in thread
From: Dave Wysochanski @ 2007-03-05 16:12 UTC (permalink / raw)
To: LVM general discussion and development
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.
LVM2
- text-based on-disk metadata
- format-specific code in lib/format_text
LVM1
- 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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2007-03-05 11:54 [linux-lvm] On-disk and LVM internal metadata representation Nallammai S
2007-03-05 16:12 ` Dave Wysochanski
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