Throughput of LTO II only 12GB/Hr
Posted on 2006-03-30
Hi I have an LTO 460 on a XP pro box with a raid 0. The drive is connected via a 29160 and is displayed at boot time as connected at 160 MB/s.
I cannot achieve better than about 12GB/hr transfer rate on the drive. I have tried the StorageWorks Tape Tools perfomance test and achive the same poor performance (3MB/s). I also receive the same performance when reading from the tape and discarding the output. So it is not the hard disks that are the bottleneck.
The health tab in Tape Tools says that current configuration is narrow and the recommended is wide - i would not have thought this a problem as the drive is connected at 160MB/s according tothe BIOS display at boot time.
Is narrow likely to be enough to limit the performance?
I tried two totally different machines one a 3.4GHz P4's with 1GB memory the other a 3.8GHz machine with 4GB (both running XP Pro)
Two Ultrium 460's with the latest firmware
a 29160LP and a 39160 with the latest drivers
I have run out of things to try
Any suggestions very gratefully received.