From mboxrd@z Thu Jan 1 00:00:00 1970 From: Xavier Brochard Subject: Re: disk order problem in a raid 10 array Date: Fri, 18 Mar 2011 21:09:31 +0100 Message-ID: <201103182109.31578.xavier@alternatif.org> References: <201103181549.20835.xavier@alternatif.org> 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: hansbkk@gmail.com Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids Le vendredi 18 mars 2011 18:22:34 hansbkk@gmail.com, vous avez =E9crit = : > On Fri, Mar 18, 2011 at 9:49 PM, Xavier Brochard =20 wrote: > > disk order is mixed between each boot - even with live-cd. > > is that normal? >=20 > If nothing is changing and the order is swapping really every boot, > then IMO that is odd. nothing has changed, except kernel minor version >=20 > Part of my SOP is now to record both mdadm and the boot loader's > ordering against serial number and UUID of drives when creating an > array, and to put the relevant information on labels securely attache= d > to the physical drives, along with creating a map of their physical > location and taping that inside the case.nt >=20 > It's critical to know what's what in a crisis. . . mdadm --examine output is somewhat weird as it shows /dev/sde1 this 0 8 33 0 active sync /dev/sdd1 /dev/sdd1 this 0 8 33 0 active sync /dev/sdc1 /dev/sdc1 this 0 8 33 0 active sync /dev/sde1 and /dev/sdf1 as sdf1 I think I can believe mdadm? and that /proc/mdstat content comes directly from mdadm (that is with "= real"=20 sdc,d,e)? what trouble me is that after I removed 2 disk drive from the bay, mdad= m start=20 to recover:=20 md0 : active raid10 sdb1[1] sdc1[4] sdd1[3] 976767872 blocks 64K chunks 2 near-copies [4/2] [_U_U] [=3D>...................] recovery =3D 5.0% (24436736/488383936= )=20 finish=3D56.2min speed=3D137513K/sec I guess that it is ok, and that it is recovering with the spare. But I = wld=20 like to be sure... Xavier xavier@alternatif.org - 09 54 06 16 26 -- 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