From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roberto Nunnari Subject: Re: failed drive in raid 1 array Date: Wed, 23 Feb 2011 22:21:09 +0100 Message-ID: <4D657A45.7020306@supsi.ch> References: <4D653B57.1030203@supsi.ch> <4D654FD8.1070206@alice.nl> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <4D654FD8.1070206@alice.nl> Sender: linux-raid-owner@vger.kernel.org To: Albert Pauw Cc: Roberto Spadim , linux-raid@vger.kernel.org List-Id: linux-raid.ids Albert Pauw wrote: > 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 depe= nds >> 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 ok. >>> # 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 good to know! Thank you. >=20 >>> # shutdown -h now >>> >>> replace the disk and boot (it should come back up, even without one= =20 >>> 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 sw= ap.=20 > Then these should be commented out in /etc/fstab > before you change the disk. Yes. They're normal mount point, so I'll have to comment them out before rebooting, especially the swap partition. Thank you for pointing that out! Best regards. Robi -- 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