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From: "kyle" <kylewong@southa.com>
To: linux-ide@vger.kernel.org
Cc: joris@v5.de
Subject: Re: ICH7: ata_piix twice as fast as ahci?
Date: Fri, 25 Apr 2008 11:09:28 +0800	[thread overview]
Message-ID: <00b001c8a681$c65fac90$9d02a8c0@kyle> (raw)

Hello Joris,

Have you solve the problem? If so, how? I think I hit the similiar problem
as yours,
but instead of ICH7, I hit the problem with ICH9.

8 x Seagate 500GB harddisks are connected to ICH9 and sil24 PCI-E
controller,
transfer rate of disks connected to ICH9 are limited at around 47MB/s, while
disks connected to sil24 reach 104MB/s. All harddisks are NCQ enabled, so I
don't think NCQ is the problem.

please cc me if possible.

Regards,
Kyle


> Hello List,

> Odd problem on my machines: the sata disks appear to be a lot slower
> when used via ata_piix vs the ahci driver.

> * dd if=/dev/sda of=/dev/null runs at roughly 50MB/s under ahci a
> steady 100MB/s under ata_piix, same for hdparm
> * bonnie++ -d /home/bonnietest -s 16G -r 8192 -u root returns:


             reply	other threads:[~2008-04-25  3:09 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-04-25  3:09 kyle [this message]
  -- strict thread matches above, loose matches on Subject: below --
2008-02-17 15:41 ICH7: ata_piix twice as fast as ahci? Joris
2008-02-17 16:10 ` Alan Cox
2008-02-17 16:39   ` Joris
2008-02-17 17:20     ` Alan Cox

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