09-08-2017 05:22 AM
Hi All,
I’m trying to build backup & archiving strategy, to keep always N (3/4) last full backups on single tape.
Just to explain concept using weekly full backup scenario:
I was hoping to configure media as OPP= 4 weeks and AP = infinite, but I’m missing some parameter wich will allow me to allow overwrite tape just partially. I was playing with Storage settings with no success.
OOP (Overwrite Protection Period) would control how many last backups should be preserved, others will be marked as expired.
Currently BE15 will result at Week 5 to forgot/erase all existing backups (Week 1 -4), so will loose backup data which is still useful and valid.
Is it possible to achieve such scenario just to PARTIALLY OVERWRITE the TAPE (expired backup set) but NOT the REST OF THE TAPE containing backups which DID NOT EXPIRED YET?
I think the only way possible for the tape media (managed by ADAMM), is that each time overwrite takes place all backup sets from the tape gets “forgotten” (technically they are not erased from tape I guess) and overwrite starts always with BLANK TAPE, so what I’m trying to achieve is impossible, at least for the time being.
If it's possible, please give me a hint how to configure BE15 to support this scenario.
Thanks & cheers!
09-11-2017 03:32 AM
There is no way to partially overwrite a tape
Backup to disk can remove older sets without affecting newer ones, tapes do not have this ability so for a tape every set on the tape has to be expired (beyond the Overwrite Protection date) for the tape to be overwritten