The 3580 is the only drive on the 2940UW. As for cable quality, I have tried three different cables with the same result. I even disconnected the Mammoth2 from the onboard IBM Ultra160 controller and used its cable with the 2940UW, with the same results.
I originally had the 3580 connected to the onboard Ultra160 controller and was having poor performance. IBM support told me that it was not on their compatibility list so I put in the 2940UW. With large files (300MB - 1GB) I can push the drive over 40GB/hr, performance only suffers when the data is smaller files. -----Original Message----- From: Dan Foster [mailto:[EMAIL PROTECTED] Sent: Friday, June 13, 2003 8:47 AM To: [EMAIL PROTECTED] Subject: Re: TSM LTO 3580 Performance Hot Diggety! Colby Morgan was rumored to have written: > The SCSI adapter is a 2940UW. It does run great with large files, so > if we had an adapter hardware bottleneck file size shouldn't make a > difference. We are running the v5.0.2183.1 of the Microsoft drivers. > I also opened a call with IBM, and they didn't make any > recommendations to update the adapter drivers. How many drives per SCSI bus? We limit it to two for a 80 MB/sec SCSI bus because a single drive is capable of pushing up to about 30 MB/sec in compressed mode over the SCSI bus. As a side note - with a diskpool, we achieve about 70-80 GB/sec with our LTO-1 drives, so the fact you're getting 1/5 to 1/8 the performance does sound pretty terrible, indeed. Could it be cabling quality issues - ie, reflection on the bus causing excessive retries or other related SCSI errors? That's another place where performance could be killed. -Dan
