>I need some explanation about HSM. Considering this,
>any file that have been migrated to HSM (i.e tape
>pool) are recalled by some access back to the disks.
>Will it be migrated to the same tape as before when
>the filesystems reach its high threshold? Is there any
>tapes redundancy in the HSM storage pool?
>Thanks for your explanation.
Indra - The incidental recall of an HSM-migrated file should
leave the file in a Premigrated state, and thus still
occupying the same space on its tape: no migration needed.
If for some reason the same file did migrate, tape usage would
be governed by the storage pool rules you have in effect, as
per Collocation.
Tape redundancy, for data integrity assurance, occurs via the
usual Copy Storage Pool mechanism.
Richard Sims, BU
