Re: SATA Harddisk speed drop of 100 MB/s

[Jeff Garzik]

Carlo Wood wrote:
> hdparm -tT gives over 160 MB/s for my tripple 10k rpm Raptor RAID5
> on 2.6.18, as expected.
>
> In 2.6.22-rc5 this dropped to only 60 MB/s !
>
> Is this a known issue?
>
> I also measured it with bonnie; I get 108 MB/s reading speed on
> 2.6.18 and only 68 MB/s on 2.6.22-rc5.

More info needed...  kernel config, before-and-after dmesg output, lspci 
output.

	Jeff



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