3
votes
2answers
197 views

LTO 2 tape performance in LTO 3 drive

I have a pile of LTO 2 tapes, and both an LTO 2 drive (HP Ultrium 460e), and an autoloader with an LTO 3 drive in (Tandberg T24 autoloader, with a HP drive). Performance of the LTO 2 tapes in the LTO ...
3
votes
3answers
928 views

Linux tape drive throughput performance statistics

Does anyone know a way, (other than using SystemTap + iostat-scsi.stp script), to get Tape Drive performance statistics? Server: Red Hat Enterprise Linux Server release 5.7 (Tikanga) Kernel ...
3
votes
1answer
437 views

Does tarring up small files into one big tar file before writing them to tape increase the level of data loss when an error occurs?

I've been looking at our backups recently and noticed that the tape throughput is a lot lower when writing lots of small files, so was thinking of tarring those small files up into one big tar file ...
1
vote
1answer
61 views

When writing remote data to a tape is the local drive throughput a factor in backup speed?

I'm working on a project to speed up our daily backups. I've mapped out the nodes that the data passes through from start to finish as best I can looking for bottlenecks. I am not sure if I should ...
4
votes
5answers
935 views

Network tape restore is faster than disk to disk copy

How can this be? Running a cp or rsync (with -W --inplace) takes two hours for 93Gb; a tape restore over the dedicated backup network is 41 minutes. Tape restore is 50 Mb/s; disk to disk was ...