[CentOS] Problems with LTO-3 and U320 on Centos 4.4

[Justin Piszcz]

On Wed, 8 Nov 2006, Joshua Baker-LePain wrote:

> On Wed, 8 Nov 2006 at 9:55am, Justin Piszcz wrote
> 
> > I've been able to push a single LTO2 tape to 93-96MB/s and single LTO3
> > tape to 137-139MB/s.  Note, the drive is an HP-Ultrium2-SCSI and
> > HP-Ultrium3-SCSI and nothing else was connected to the SCSI bus.  I used
> > NetBackup to perform the tests with various levels of multiplexing.
> 
> *And* your data was obviously fairly compressible.  Native rated speed for
> LTO3 is 80MB/s.
> 
> -- 
> Joshua Baker-LePain
> Department of Biomedical Engineering
> Duke University
> 
> 
 
Correct, I optimized all settings I could find.  I used a file that was 
all A's, i.e.: AAAAAAAAA and placed it on a ram disk.  I wanted to see how 
far I could push the drive/tape.
 
With regular filesystem data, I hit 90-127MB/s depending on the level of
multiplexing.