[linux-lvm] (no subject)

[Heinz J . Mauelshagen]

On Thu, Oct 03, 2002 at 02:48:25AM -0700, Ruchika Adukia wrote:
> linux-lvm at sistina.com <linux-lvm at sistina.com>
> 
> hello,
> according to my knowledge snapshot's each pe holds
> first COW table structures and then data.

Correct.

> what i want
> to now is how to know that this chunk of data on pe
> belongs to which data block on the original filesystem
> and wether the file to which the data block belongs
> was created after the snapshot was taken.

If your question aims to answer the creation/modification issue:

- if the file doesn't exist in the original it was created *after* the
  snapshot was taken :)

- if it exists in both, you can compare the content

Please tell me, if you still need more information about the snapshot mappings.

> 
> Is there any other metadata stored on snapshot PE
> other than cow table entries.

No.

> 
> thanx ruchika
> 
> ruchika_singh_2000 at yahoo.com
> 
> 
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-- 

Regards,
Heinz    -- The LVM Guy --

*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***

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Heinz Mauelshagen                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen at Sistina.com                           +49 2626 141200
                                                       FAX 924446
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