Just wanted to come back and post my experience. It turns out that at some point I had turned on compression in the RD1000 cartridge volume properties in Windows and also created compressed media on them using Backup Exec. To remedy the performance problems I reformatted each RD1000 cartridge and DID NOT check the "allow compression on this drive". Also I checked all of my Backup Exec jobs to insure that no compression was being used. Performance is now more in line with the manufacturer's spec. Thanks for getting involved Kenny. I appreciate your help.
Hello, The performance on our RD1000 has degraded significantly. We use the internal RD1000 on our SBS 2011 server to backup using Backup Exec 2010 R3. Assuming the performance issue might be caused by Backup Exec I proceeded to test by just copying files across using Explorer and found that I was getting about avg. 8 MBps.  After some searches I found some documentation that gave instructions to re-install the RD1000 driver/software. I did this and rebooted the server to no avail. ATA Channel 1 states Ultra DMA Mode 4. Write Caching is enabled on the drive. Compression is enabled on the drive. Has anyone experienced this issue and found a solution?  Thanks!
PE-T610 with RD1000 Slow Performance