Hi Per,
TSM gives you a command (dsmmigundelete) that recreate the stub files if
they were deleted from your local file system. Having this command there
would be no need to backup the metadata. At least, it is as far as I
understand.
Regards.

Sergio

Per Ekman wrote:

> Hello,
>
> I'm wondering if there is any canonical way of taking backups of
> metadata in a TSM-HSM managed filesystem (that is non-migrated data
> such as directories, links and small files) under AIX. What I would
> like to accomplish is to have each file, migrated or not, stored on
> two tapes.  As I understand it, if I backup the HSM filesystem using
> the TSM backup client I'll get a backup of all files. Since I want
> duplicates of the unmigrated files I'll have to backup the copy
> pool, but this means that I'll get three copies of migrated files,
> one in the migration destination pool and two in the backup pools.
> This is not ideal when you throw a couple of TB of data into you
> HSM system.
>
> Coming from the DMF camp my instinct is to look for an option to the
> backup client to make it backup only nonmigrated files but I guess
> there might be some more obscure way of doing it.
>
> Deactivating the HSM client and taking a regular backup of the
> filesystem would probably do what I want but it's not a very
> attractive solution.
>
> /Per Ekman

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Sergio R. Cherchyk
Sergio R. Cherchyk
Arquitectura Tecnológica - Midrange
Banco Río de la Plata S.A. - Grupo BSCH
Mire 480, 2do piso - 1036 Cap. Fed.
Argentina
Tel. (054)-11-4341-1643
Fax. (054)-11-4341-1264
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