Hi Folks 

I have 11 Protection groups configured to 30 days disk backups and then on 1st of every month that data to be written to tape. 

Means 

Short Term retention (Disk) : 30 Days

Long Term retention (Tape) : 5 Years (To be written on 1st of every month) 

Now I have 3 TB each tape in tape library, on tape job time - express full backups size is varying between 2.5 TB to 3.5 TB.

Through tape optimization I have configured all tape backups to single tape, so when data size is 2.5 TB that is writing properly.

But when data size is more than 3 TB on tape job time, it make tape offsite ready after filling it and the jobs having restof 500 Gigs data are failing. Is there any way so I can calculate data size before 1st of month so I can decide either to send it to single tape or two !

• Moved by Mike JacquetMicrosoft employee, Moderator Friday, April 24, 2015 5:42 PM

Sorry for confusion Mike. 

From your point now I sumarize that if tape filled up then pending job should had to written on new tape ! (correct me if I am wrong)

I checked logs now, these jobs failed due to modifying protection groups. I understand now thats why these job failed and If someone didn't do this then that pending data was supposed to written new tape. 

But, still is there any way to guess data size? I dont want to fill one tape with 3TB and use 2nd tape for another 200 Gigs. 

• Edited by Vijay MC Friday, April 24, 2015 6:32 PM

Thanks for script. 

This showing sum of all replicas = 3352.6 GB. I think I will have to optimize tapes into 2 or will have to de-select unwanted backups to tape. 

Thanks a lot for this script.

• Edited by Vijay MC Friday, April 24, 2015 8:35 PM