From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?ISO-8859-1?Q?J=E9r=F4me_Poulin?= Subject: Re: raid1 sector size Date: Sun, 6 Feb 2011 13:03:59 -0500 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Roberto Spadim Cc: Linux-RAID List-Id: linux-raid.ids On Sun, Feb 6, 2011 at 11:49 AM, Roberto Spadim = wrote: > the problem (benchmark) i don't know if it's a cpu intensive use > that's blocking some i/o (try to reduce IOPS on md raid1), or a > problem at read logic (check if disk is ok) > > [root@myhost block]# dd if=3D/dev/sda of=3D/dev/zero bs=3D8196 > ^C80106+0 registros de entrada > 80105+0 registros de sa=EDda > 656540580 bytes (657 MB) copiados, 5,38142 s, 122 MB/s > > [root@myhost block]# dd if=3D/dev/md0 of=3D/dev/zero bs=3D8196 > ^C52851+0 registros de entrada > 52850+0 registros de sa=EDda > 433158600 bytes (433 MB) copiados, 10,4623 s, 41,4 MB/s > You could try with some computer friendly bs=3D value, like 8192. -- 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