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Message-ID: <yq1fxi2gibz.fsf@sermon.lab.mkp.net> Date: Wed, 25 Feb 2009 19:20:00 -0500 From: "Martin K. Petersen" <martin.petersen@...cle.com> To: david@...g.hm Cc: "Martin K. Petersen" <martin.petersen@...cle.com>, "H. Peter Anvin" <hpa@...or.com>, Matthew Wilcox <matthew@....cx>, linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org, sandeen@...hat.com Subject: Re: ATA support for 4k sector size >>>>> "david" == david <david@...g.hm> writes: david> even if we can't get them to give us any info from the drive david> directly, we still want to allow the sysadmin to configure the david> use of the systems when they can find the info in other ways. You can specify RAID parameters on the mkfs.xfs command line today. mke[234]fs have similar knobs. david> if you have the smallest and largest I/O you can submit without a david> penalty and the alignment, isn't the optimal I/O size everything david> between these two? (or at least everything between these two may david> be close enough that defining an 'optimal' size may not be david> worthwhile) These parameters come straight out of SCSI. I described them wrong. maximum is the biggest I/O the device can handle, full stop. Optimal is the preferred I/O size for the array. -- Martin K. Petersen Oracle Linux Engineering -- 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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