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Date: Wed, 4 Jul 2007 18:44:05 +0300 From: Dan Aloni <da-x@...atomic.org> To: Michael Tokarev <mjt@....msk.ru> Cc: Kernel Mailing List <linux-kernel@...r.kernel.org>, linux-ide@...r.kernel.org, linux-scsi@...r.kernel.org Subject: Re: Some NCQ numbers... 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). -- Dan Aloni XIV LTD, http://www.xivstorage.com da-x (at) monatomic.org, dan (at) xiv.co.il - 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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