07-04-2011 03:36 AM
Hello...
I am trying to backup data located in a NETGEAR READYNAS 2100.
I have installed the Backup Exec-addon in the NAS and added the RALUS in my Backup Exec Media Server.
Versions used: Backup Exec 12.5.
I am trying to backup about 575 GB of data, to a LTO3 autoloader.
However, something is messed up. The target device is a partition on the autoloader, consisting of 2 x LTO3 media (400/800).
Compression type set to: "Hardware, if available, otherwise none".
After about 470 GB has been backup up, I receive a message telling me to insert media.
When I check the tapes in the partition, it says, for each tape:
"Used capacity: 389,7GB of 390,9GB
Data: 200 GB"
The value in the Data-field is different each time I run the job, but always about 200 GB.
That is a very big problem for me !
The same mediaserver manages backup jobs for 12 Windows servers, and those jobs works perfectly, many of them spanning multiple tapes with an average compression rate of about 1,2:1.
I have read posts on the forum, and it seems there are others who have the same problem, altough maybe not with the same combination of hardware/software, but I can´t find a solution to the problem.
Please help me :(
07-04-2011 06:36 PM
The native (uncompressed) capacity of a LTO3 tape is 400GB so the used capacity numbers are correct. Your NAS has nothng to do with your problem. You should check your data. If you have a lot of compressed data, like zipped files, movies and sound clips, then compressing them may result in a bigger file. See my article below on this subject
https://www-secure.symantec.com/connect/articles/compression-short-explanation
You might want to turn off compression and see what result. You may be able to store more onto your tapes if you have a lot of compressed files.