From mboxrd@z Thu Jan 1 00:00:00 1970 From: CoolCold Subject: Re: RAID halting Date: Sat, 25 Apr 2009 00:28:37 +0400 Message-ID: References: <20090424045222253.GZTS2063@cdptpa-omta04.mail.rr.com> <49F22035.3020507@sauce.co.nz> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <49F22035.3020507@sauce.co.nz> Sender: linux-raid-owner@vger.kernel.org To: Richard Scobie Cc: Doug Ledford , lrhorer@satx.rr.com, Linux RAID List-Id: linux-raid.ids On Sat, Apr 25, 2009 at 12:25 AM, Richard Scobie = wrote: > Doug Ledford wrote: > >>> Also, in my reading it was suggested by several researchers the bes= t >>> performance of an XFS file system is achieved if the stripe width o= f the >>> FS >>> is set to be the same as the RAID array using the su and sw switche= s in >>> mkfs.xfs. >> >> This is true of any raid aware file system. =A0I know how to do this= for >> ext3, but not for xfs, so I won't comment further on that. =A0Howeve= r, the >> stripe size is always chunk size * number of non-parity drives on a = parity >> based array. > > mkfs.xfs will will query the md device for no. of devices and stripe = size > and automatically set this optimally (su and sw). It will, but need dmsetup installed. > > If an array is later grown, these two values will need to be manually > calculated and then be applied as mount options. > > Regards, > > Richard > -- > To unsubscribe from this list: send the line "unsubscribe linux-raid"= in > the body of a message to majordomo@vger.kernel.org > More majordomo info at =A0http://vger.kernel.org/majordomo-info.html > --=20 --=20 Best regards, [COOLCOLD-RIPN] -- To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html