Ditto what Michael Green said and, if you rename the LTO3 pools to
<NAME_OLD> and give the new LTO4 pool the original poolname, it's very
transparent: TSM will write to the new LTO4 pool as usual (it has the old
name), but if a restore is requested, TSM knows that the requested files are
now in <NAME_OLD> stgpool.
Steve Stackwick
On Thu, Dec 24, 2009 at 7:03 AM, Michael Green <mishagreen AT gmail DOT com>
wrote:
> When I was migrating from LTO2 to LTO4 I created new new LTO4
> devclass and based on them new LTO4 stgpools and set them as target
> for migration and then moved all the data from LTO2 stgpool to LTO4.
> If you would prefer to not move the data actively you can set LTO4
> pools as target stgpool for the reclamation of LTO2 pools. That will
> move the data gradually over time from LTO2 to LTO4.
> --
> Warm regards,
> Michael Green
>
>
>
> On Thu, Dec 24, 2009 at 1:28 PM, Baker, Jane <Jane.Baker AT clarks DOT com>
> wrote:
> > 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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--
Stephen Stackwick
ICF Jacob & Sundstrom
401 East Pratt St., Suite 2214
Baltimore, MD 21202-3003
(410) 539-1135 * (866) 539-1135
sstackwick AT icfi DOT com
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