From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roberto Leibman Subject: How to activate a spare? Date: Fri, 15 Jun 2012 08:04:52 -0700 Message-ID: <4FDB4F14.3030609@leibman.net> References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids I must be missing something completely obvious, but I've read the man page, and went through the archive for this list. One of the hard drives in my raid array failed... I have taken the hard drive out, replaced it with a new one, copied the partition table (using gdisk) and then added the drive to the raid array with: mdadm --add /dev/md0 /dev/sdb3 I then monitor it with "mdadm --detail /dev/md0" or "cat /proc/mdstat" until it synchronizes After an ungodly number of hours, the thing finishes synchronizing, but the new drive only shows up as a spare. So the RAID is still degraded.... I have not been able to get the new drive to become part of the array as active, web searches have proved useless (people with the same problem and no resolution). I've even failed/removed the active drive, at which point the spare becomes active, but when I add the original drive it still adds it as a spare) So how do I make it active??? (it's in the middle of trying again, but here's what I have) -------------- root@frogstar:~# cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md0 : active raid1 sda3[2] sdb3[0] 1943454796 blocks super 1.2 [2/1] [U_] [>....................] recovery = 1.0% (20096128/1943454796) finish=737.0min speed=43493K/sec unused devices: -------------- and root@frogstar:~# mdadm --detail /dev/md0 /dev/md0: Version : 1.2 Creation Time : Sat Apr 14 13:52:25 2012 Raid Level : raid1 Array Size : 1943454796 (1853.42 GiB 1990.10 GB) Used Dev Size : 1943454796 (1853.42 GiB 1990.10 GB) Raid Devices : 2 Total Devices : 2 Persistence : Superblock is persistent Update Time : Thu Jun 14 13:13:54 2012 State : clean, degraded, recovering Active Devices : 1 Working Devices : 2 Failed Devices : 0 Spare Devices : 1 Rebuild Status : 1% complete Name : frogstar:0 (local to host frogstar) UUID : 88ed6cd4:de463005:31ed764c:2b23a266 Events : 47610 Number Major Minor RaidDevice State 0 8 19 0 active sync /dev/sdb3 2 8 3 1 spare rebuilding /dev/sda3 The version of mdadm I'm using is the stock on ubuntu 10.10 (v3.1.4)