From Bugzilla Helper: User-Agent: Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0; KKman2.0) Description of problem: When using "hdparm -t /dev/hda", I got poor result with VIA8231/8233 in RH7.2. But in 7.1, the result is satisfied. Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1.using a VIA 8231/8233 SB and a ATA100 HDD then install RH7.2 2.after installation, login the system 3.run the command "hdparm -t /dev/hda" Actual Results: The result is poor than we expected!! (5~7MB/sec) And the kernel doesn't know the SB (8231/8233) in boot time (dmesg). Expected Results: The result should be shown as a ATA100 HDD does. And the kernel should know the 8231/8233. Additional info: If we use VIA 8231/8233 SB and a ATA100 HDD in Redhat 7.2, use the parameter "- t" and the result (5~7MB/sec)is more poor than we expect. But in RH7.1 the result (29~30MB/sec) is fine. After checking the boot message, I found the kernel doesnot know 8231/8233 SB in RH7.2, but they can be known in RH7.1. And I viewed the VIA IDE driver(Ver 3.23) found that, 8231/8233 were placed in the section "VIA_New_Bridges_tested" in RH7.2. But in RH7.1, 8231/8233 were placed with other chips (IDE ver3.20).