I'm seeing poor performance with Redhat 8.0 and Adaptec's 7902 Ultra320 SCSI with the driver version 1.3.0 or 1.3.1 and dmesg includes a message like:
(scsi0:A:0:0): refuses synchronous negotiation. Using asynchronous transfers
Do you know any fixes for this issue?
Drivers 1.3.7 and later should resolve this issue.