Joshua Baker-LePain wrote: > On Tue, 7 Nov 2006 at 12:39pm, Plant, Dean wrote > >> I am currently testing an Overland Tape storage unit with a LTO-3 >> drive on CentOS 4.4. After a random amount of time but usually when >> we have backed up about 0.5-1TB we get scsi errors which cause the >> backup to fail. I have rebuilt the box with Solaris 10 x86 and >> Windoze to prove the hardware and have successfully backed up over >> 3TB on each OS without error. >> >> Can anyone offer advice on how to find out what is causing the error >> in CentOS. > > Your best bet to track down exactly what those errors mean would be to > head over to the linux-scsi list. But I can tell you that I've been > using an Overland LTO3 library on centos-4 for over a year now with > very good results. The 2 main differences are that I'm using an > x86_64 server (I doubt that makes much difference) and an LSI 21320 > HBA. I have had nothing but good luck with LSI adapters, and I think > it'd be worth it for you to give one a shot. > > I will say this, though. If you plan on ever using 2 drives in the > library, get the 22320, which has 2 external channels. I've been > tearing my hair out trying to get both drives in my library to write > at full speed at the same time, and no matter what driver tweaks I > make, I just can't get it to go. My 22320 arrives today, and I'm > rather hoping that'll fix the problem. Thanks for your reply, I think ill try the LSI adapter, as your setup seems very similar. Just out of curiosity what sort of backup speeds do you get to a single LTO3 drive?. I seem to struggle to get anything above 60-70MB/s. Dean.