From mboxrd@z Thu Jan 1 00:00:00 1970 From: Keld Simonsen Subject: Re: raid10,f2 Add a Controller: Which drives to move? Date: Tue, 13 Apr 2010 11:23:54 +0200 Message-ID: <20100413092354.GA7581@rap.rap.dk> References: <4BC29670.6020504@unart.cz> <4BC2B887.6020403@stud.tu-ilmenau.de> <4BC2CF14.9000209@unart.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-2 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Content-Disposition: inline In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Simon Matthews Cc: =?iso-8859-2?B?VG9t4bkgRHVs7Ws=?= , st0ff@npl.de, Linux RAID List-Id: linux-raid.ids I am not sure it has been said, but for a 4 disk raid10,f2 array you should place the first and the second disk on one controller, and t= hen the 3rd and 4th on the second controller. Then you would have a copy of all blo= cks even if one controller fails. I believe the order is defined by the order the disks are specified in on the mdadm --create line. best regards keld On Mon, Apr 12, 2010 at 08:26:55PM -0700, Simon Matthews wrote: > 2010/4/12 Tom=E1=B9 Dul=EDk : > > Stefan /*St0fF*/ H=FCbner napsal(a): > >> > >> I cannot quite understand your problem. =A0As every part of the ar= ray > >> contains it's own metadata, it doesn't matter to md which /dev/sdX= a > >> drive is. =A0It might matter a bit for boot-time assembly, but act= ually > >> that's what UUIDs are for. > >> > > > > I know how UUIDs work. > > My problem with device names is not a "critical", it's about "user > > friendliness" of the physical disk management. > > If a disk fails and I receive email "A Fail event had been detected= on md > > device /dev/md2. It could be related to component device /dev/sdd3"= , how > > will I know which disk should be replaced, if the device name is no= t > > fixed/persistent? I >=20 > Record the serial number of the disks and which bay they are in. > -- > 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 http://vger.kernel.org/majordomo-info.html -- 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