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Message-ID: <468BC81F.7090102@msgid.tls.msk.ru> Date: Wed, 04 Jul 2007 20:17:35 +0400 From: Michael Tokarev <mjt@....msk.ru> To: Dan Aloni <da-x@...atomic.org> CC: Kernel Mailing List <linux-kernel@...r.kernel.org>, linux-ide@...r.kernel.org, linux-scsi@...r.kernel.org Subject: Re: Some NCQ numbers... Dan Aloni wrote: > On Thu, Jun 28, 2007 at 02:51:58PM +0400, Michael Tokarev wrote: >> [..] >> Test machine was using MPTSAS driver for the following card: >> SCSI storage controller: LSI Logic / Symbios Logic SAS1064E PCI-Express Fusion-MPT SAS (rev 02) >> >> Pretty similar results were obtained on an AHCI controller: >> SATA controller: Intel Corporation 82801GR/GH (ICH7 Family) Serial ATA Storage Controller AHCI (rev 01) >> on another machines. > > Are you sure that NCQ was enabled between the controller and drive? > Did you verify this? I know about some versions that disable NCQ > support internally in their firmware (something to do with bugs in > error handling). The next obvious question is: how to check/verify this? /mjt - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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