Red Hat Bugzilla – Bug 64378
Using parameter "-t" and get poor result with VIA 8231/8233 in RH7.2
Last modified: 2016-09-25 07:09:24 EDT
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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):
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.
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).