Backup Requesting additional media

Our backup keeps coming back saying please insert additional media. I have manually checked the amount of information to be backed up and at most it is only comed to approx 30GB which i dont think is too much for one tape. We are using an HP C7438A driver with DAT72 tapes. the backup software is brightstor arcserve r11.1 running on windows server 2003 SBS. I have already been in touch with CA and was promptly told "support no longer offered heres a free trial for the new version". Can anyone help me with this?
Paul BrooksAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

ManicDCommented:
DAT72 Tapes fit 36GB uncompressed or 72GB compressed.

You could try turning on compression on your backups and see if that has sorted it.

Please be aware many formats such as JPG are already compressed and connot be compressed further. If you have a high volume of these you might want to be looking at using a different tape drive, or setting up a storage server to hold yoru backups.

0
Paul BrooksAuthor Commented:
media compression is disabled but the job is set to compress files prior to the backup
0
Thomas RushCommented:
Let the tape drive do the compression, for at least two reasons.

1) It's done in an ASIC on the tape drive, and happens without any performance overhead
2) If you do it on your server, you're putting a lot of stress on your CPU (although at the speed of DAT this may not be an issue; it is for sure with LTO-3 and LTO-4) and may slow down the backup speed.
3) If you accidentally compress on the server, and then compress again on the tape drive, file size may actually grow, because of the overhead of compression metadata.

Tape drives are made to compress data; let them do it.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
prashant9885Commented:
ARCserve is intelligent enough to detect hardare compression on tape drive and disable it's own compression. You should also get an warning message saying Software compression disabled as hardware compression is enabled on the tape drive.

Compression depends on many factors. Most common one is type of backup like files backup, DB backup etc..

Try to compare hardware and software compression. ARCServe should give you compression ratio if job is running with software compression.

You can also reduce the amount of data selected in source. Find if you have any duplicate selections.



0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Storage

From novice to tech pro — start learning today.