netbackup lto5 tape stored data capacity

[kabacsk]

Dear Forum,

I check how much data can be held on a single lto5 tape with netbackup.
I made some backup and now the bpmedialist says that I have backup data on one tape 2323751Megabytes. This is more than the tape 1,5Terra uncompressed data capacity. I have not set at policy attributes the checkbox of compression. Is it possible that in case of backups the lto5 tape compressed capacity 3Terra counts as possible saving ammount? Or the policy type also determine how much data can be kept on a single tape?

Can someone gives me details on this?

Thank you in advance

Regards

Karoly
 

[revarooo · Accepted solution]

Have a read here:

http://en.wikipedia.org/wiki/Linear_Tape-Open

Native capacity for LTO5 is 1.5Tb

Says about Compression: LDC "2:1"

So should be able to get 3Tb on LTO5 tapes in an ideal world :)

NetBackup Policies do not determine what can be put on media - that is down to the physical storage/drives

[Marianne]

This type of question is asked on a regular basis. Hardware compression is by default enabled on tape drives. Compression ratio is determined by type of data. Some data types compress well (e.g. plain text) and some don't (e.g. media files ).

[kabacsk]

thank you I firstly thought that data only uncompressed :) this is a good new for me.