We have a TS3500 which is physically partitioned to allow for LTO2 &
LTO3 mixed media.  We're planning on replacing the LTO3 drives with LTO4
drives early in January and obviously we'll need to balance the number
of LTO3 & LTO4 tapes in the library as the data migrates to LTO4.  Is it
possible to set the LTO3 tapes to readonly to force writes onto the new
tapes or do I have to migrate the tapes manually?

Just concerned that if I set the LTO3 tapes to read only it'll flag
loads of errors about the status of the tape.

I guess what I'd like to happen is to swap out the drives, checkout
spare LTO3's checkin some spare LTO4's and set the 3's to readonly so
that they can be restored from but not written too then it's just a case
of balancing the scratches until all data is migrated to LTO4.

Is it as simple as I'd like it to be or are there any gotcha's in there?
Someone out there will probably point out a glaring flaw in my plan, but
that's what the list is for after all.

:0)

Any comments welcomed.

Happy Christmas!

Regards,
Jane.



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