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David Bourgeois wrote: |
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> Hi, |
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> |
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> I have much trouble to get sata working with an Intel 82801I (ICH9 Family) |
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> interface from a Compaq dc5800. The minimal CD 2008.0 uses the ata driver |
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> and not sata so harddisks are registered as /dev/hda. After installation, my |
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> custom kernel does the same and I had to disable ata completely (CONFIG_IDE) |
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> before the sata driver was loaded correctly. (followed thread: |
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> http://bugs.gentoo.org/show_bug.cgi?id=184825) |
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> |
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> Now the sata driver loads correctly (it seems) but my hardisk is extremely |
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> slow: |
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> /dev/sda: |
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> Timing cached reads: 3746 MB in 2.00 seconds = 1874.11 MB/sec |
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> Timing buffered disk reads: 6 MB in 3.20 seconds = 1.88 MB/sec |
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> |
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> while when CONFIG_IDE is set, I have the following performace with the ata |
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> driver: |
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> /dev/hda: |
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> Timing cached reads: 7550 MB in 2.00 seconds = 3779.94 MB/sec |
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> Timing buffered disk reads: 14 MB in 3.46 seconds = 4.05 MB/sec |
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> |
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> Any idea on what I can try to do next? Some more info on my setting below. |
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|
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It seems you have set up the SATA controller to do (sub-optimal) |
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IDE/PATA emulation rather than native AHCI. Try enabling "AHCI" in the |
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BIOS (search for it in the SATA/IDE settings) and enable "<*> AHCI SATA |
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support" in the kernel. |
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|
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Note that if you do that and you have Windows installed on the same |
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machine, you'll need to reinstall Windows since it won't boot anymore if |
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you change to AHCI. |
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