Hi to all ITSMers who writes data into Tape Copystoragepool.

Nowadays two tapes (Storage Pool Type PRIMARY and Storage Pool Type COPY)
ONLY can be written simultaneosly with a Client SESSION.
When Migration from Diskpool to Tapepool runs this is NOT possible.
A Backup Storagepool from Storage Pool Type PRIMARY to Storage Pool Type
COPY must be done to get the Backupdata for the desaster location into SYNC.
I know, there is a workaround to backup the DISK Storage Pool to the COPY
Tape Pool first. We do this also.
But there are situations in a large production system, where the real live
do not agree with the concepts of the ITSM Manual.

Therefore in the year 2002 we started a marketing request, but there is no
positive response from IBM to do this (only promisis - not so urgent and so
important - only for my IT..., but in the meantime I know several
installations in Austria with the same need!)

It should be possible, when starting a migration from disk to tape pool, the
SECOND COPY is done at this time with a lot of benefits:
* Backup/Archive Data are ALWAYS in SYNC for desaster or simply when the
primary ATL (Tape Robot) must be varied offline for maintenance
* CPU cycles are saved, because you do not need to run a Backup Storagepool
or copy the tape after migration is finished
* the big Cartrides (300GB) are not held for hours and hours when the
Migration runs and the Backup Storagepool is waiting fot the input tape and
wastes a device


If you have same or similar symptoms and want to Dual Write for Migration
please ANSWER !!!

yours sincerely
Othmar Vojta
INFORMATIONS-TECHNOLOGIE AUSTRIA GMBH
ZDM - Zentrales Datenmanagement
A-1020 Wien, Lassallestraße 5
Telefon: +43-1-217 17- 57882
Telefax: +43-1-217 17- 8957882
mailto:Othmar.Vojta AT iT-AUSTRIA DOT com