Compression wrong

[CESAR_JUNIOR]

Working with symantec backup exec 12.0 for a while already, one week I am having trouble backing up LTO tape-dell, it starts back up and asks for second tape, as if the space of the tape is finished. I believe he is not doing the compression of the files correctly, someone could help me?

[CraigV]

So did that fit onto 1 tape?

[Ken_Putnam]

1 - 200GB 400GB uncompressed and compressed the total file is 295GB.


How much data is written to the second tape?

I generally assume about 1.2-1.3.1 until a specific job has run a few times and I can get an average for that specific job.

if not very much gets written to the follow on tape, then you are getting ~1.5:1, which wouldn't be bad at all

[CESAR_JUNIOR]

No, today when he gave 295GB asked the other strand.

[CraigV]

Then that is about right...to get 400GB on a 200GB tape in 2:1 compression is pretty much best-case scenario. I haven't seen it before, although it is possible.
Your only way to sort this out would be...

1. Continue spanning over 2 tapes.
2. Buy a larger tape drive (be it stand-alone, autoloader, library) and the associated tapes.
3. Clean up some files and folders and therefore make the backups smaller. Look at excluding files like *.mp3, *.wav etc.

Some files are compressed already, meaning Backup Exec won't compress them further. I think that what you're getting is the best you will get on those tapes in your current setup.

Laters!

[CraigV]

Hi,

Did you ever come right here? If so, can you close off with the solution?

Thanks!