Yes I have and when a tape goes bad from one backup, it is *EXTREMELY*
important to have that secondary backup copy.

On 5/17/06, Greenberg, Katherine A <GreenbergKA AT aetna DOT com> wrote:
> Have you honestly have to recover data (really... except for long-term
> retention stuff for legal or whatever) that is older than 2 weeks?
>
> I haven't.
>
> Am I just lucky?
>
> ~Kate
>
>
>
> -----Original Message-----
> From: veritas-bu-admin AT mailman.eng.auburn DOT edu
> [mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] On Behalf Of Paul
> Keating
> Sent: Wednesday, May 17, 2006 9:05 AM
> To: veritas-bu AT mailman.eng.auburn DOT edu
> Subject: RE: [Veritas-bu] Retention Period Question
>
>
> That ain't gonna work.
>
> You FULL retention must be at least the retention of the daily, plus the
> time between FULLs.
>
> In other words, if you're guaranteeing daily aggregation restores for 60
> days, and you have a weekly FULL, you need to keep for FULLs for a
> minmum of 67 days.
>
> Otherwise when you FULL expires after 61 days, you just lost the ability
> to restore from the subsequent incrementals untill the next FULL.....so
> assuming Weekly (every 7 days) FULLs with 60 day retention.... after 61
> days, you can only restore back to 61-7 =54 days.
>
> If you're gaurateeing dailies for 60 days and you only do monthly FULLs,
> you need to keep your FULL for 90 days.....and "just in case" that
> oldest FULL goes bad, it's nice to have an extra......so weekly fulls
> keep for minimum 2 weeks longer than incrementals....or if you only do
> monthly fulls, keep them for 2 months longer than the incrementals.
>
> Paul
>
>
>
> --
>
>
> > -----Original Message-----
> > From: veritas-bu-admin AT mailman.eng.auburn DOT edu
> > [mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] On Behalf Of
> > Justin Piszcz
> > Sent: May 16, 2006 9:40 AM
> > To: DLew97
> > Cc: veritas-bu AT mailman.eng.auburn DOT edu
> > Subject: Re: [Veritas-bu] Retention Period Question
> >
> >
> > Most people run a full backup weekly and then incrementals in between
> > and then set your FULL retention to 60 days.  Consider what happens if
>
> > 1 full went bad? You would be out many weeks of data!
> >
> > Also, that is a bad way of doing things, 1 full every 4 weeks and X
> > number of incrementals? You'll spend a VERY long time restoring the
> > incrementals after you restore the full backup.
>
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