From mboxrd@z Thu Jan 1 00:00:00 1970 From: Max Waterman Subject: trouble adding spare Date: Wed, 14 Jan 2009 11:43:00 +0200 Message-ID: <496DB3A4.4090605@fastmail.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Hi, I have a RAID5 array using 6 disks and 2 spares. I took one spare away for a few months for another purpose (OS X) and am having trouble adding it back in as a spare. I can add it manually : sudo /sbin/mdadm /dev/md2 -a /dev/sdi but it doesn't want to add itself in after rebooting (the other spare is added ok). I'm sure this is simple for someone... Max. /dev/md2: Version : 00.90 Creation Time : Sat Aug 6 05:18:41 2005 Raid Level : raid5 Array Size : 976804480 (931.55 GiB 1000.25 GB) Used Dev Size : 195360896 (186.31 GiB 200.05 GB) Raid Devices : 6 Total Devices : 8 Preferred Minor : 2 Persistence : Superblock is persistent Update Time : Wed Jan 14 11:27:11 2009 State : clean Active Devices : 6 Working Devices : 8 Failed Devices : 0 Spare Devices : 2 Layout : left-symmetric Chunk Size : 64K UUID : 15bfec75:595ac793:0914f8ee:862effd8 Events : 0.9341278 Number Major Minor RaidDevice State 0 8 80 0 active sync /dev/sdf 1 8 96 1 active sync /dev/sdg 2 8 16 2 active sync /dev/sdb 3 8 48 3 active sync /dev/sdd 4 8 32 4 active sync /dev/sdc 5 8 64 5 active sync /dev/sde 6 8 128 - spare /dev/sdi 7 8 112 - spare /dev/sdh ..../etc/mdadm/mdadm.conf DEVICE /dev/sd[bcdefghi] # auto-create devices with Debian standard permissions CREATE owner=root group=disk mode=0660 auto=yes # automatically tag new arrays as belonging to the local system HOMEHOST # instruct the monitoring daemon where to send mail alerts MAILADDR davidmaxwaterman@fastmail.co.uk # definitions of existing MD arrays ARRAY /dev/md2 level=raid5 num-devices=6 UUID=15bfec75:595ac793:0914f8ee:862effd8 spares=2