From mboxrd@z Thu Jan 1 00:00:00 1970 From: Albert Pauw Subject: Re: failed drive in raid 1 array Date: Wed, 23 Feb 2011 19:20:08 +0100 Message-ID: <4D654FD8.1070206@alice.nl> References: <4D653B57.1030203@supsi.ch> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Roberto Spadim , linux-raid@vger.kernel.org List-Id: linux-raid.ids On 02/23/11 06:56 PM, Roberto Spadim wrote: > sata2 without hot plug? > check if your sda sdb sdc will change after removing it, it=B4s depen= ds > on your udev or another /dev filesystem > > 2011/2/23 Roberto Nunnari: >> Hello. >> >> I have a linux box, with two 2TB sata HD in raid 1. >> >> Now, one disk is in failed state and it has no spares: >> # cat /proc/mdstat >> Personalities : [raid1] >> md1 : active raid1 sdb4[2](F) sda4[0] >> 1910200704 blocks [2/1] [U_] >> >> md0 : active raid1 sdb1[1] sda2[0] >> 40957568 blocks [2/2] [UU] >> >> unused devices: >> >> >> The drives are not hot-plug, so I need to shutdown the box. >> >> My plan is to: >> # sfdisk -d /dev/sdb> sdb.sfdisk >> # mdadm /dev/md1 -r /dev/sdb4 -> removing should be ok, as the partition has failed in md1 >> # mdadm /dev/md0 -r /dev/sdb1 -> In this case, sdb1 hasn't failed according to the output of=20 /proc/mdstat, so you should fail it otherwise you can't remove it: mdadm /dev/md0 -f /dev/sdb1 mdadm /dev/md0 -r /dev/sdb1 >> # shutdown -h now >> >> replace the disk and boot (it should come back up, even without one = drive, >> right?) >> >> # sfdisk /dev/sdb< sdb.sfdisk >> # mdadm /dev/md1 -a /dev/sdb4 >> # mdadm /dev/md0 -a /dev/sdb1 >> >> and the drives should start to resync, right? >> >> This is my first time I do such a thing, so please, correct me >> if the above is not correct, or is not a best practice for >> my configuration. >> >> My last backup of md1 is of mid november, so I need to be >> pretty sure I will not lose my data (over 1TB). >> >> A bit abount my environment: >> # mdadm --version >> mdadm - v1.12.0 - 14 June 2005 >> # cat /etc/redhat-release >> CentOS release 4.8 (Final) >> # uname -rms >> Linux 2.6.9-89.31.1.ELsmp i686 What about sdb2 an sdb3, are they in use as normal mountpoints, or swap= =2E=20 Then these should be commented out in /etc/fstab before you change the disk. >> Thank you very much and best regards. >> Robi >> -- >> 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