From mboxrd@z Thu Jan 1 00:00:00 1970 From: evoltech@2inches.com Subject: /proc/mdstat showing a device missing from array Date: Sun, 13 May 2007 11:33:54 -0700 Message-ID: <1179081234.46475a12d46ba@mail.2inches.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Return-path: Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Hello all, I just set up a new raid 5 array of 4 750G disks and am having a strange experience where /proc/mdstat is showing that one device is missing from the array. The output from a "--detail" shows that there is some unnamed device that has been removed from the array and I don't understand why or how to fix it. Can someone please shed some light? kernel version: 2.6.20-1.2312.fc5xen0 (this is a fedora core 5 prebuilt kernel) mdadm version: mdadm - v2.3.1 - 6 February 2006 [root@storage ~]# cat /proc/mdstat Personalities : [raid6] [raid5] [raid4] md2 : active raid5 sdg[4] sdf[2] sde[1] sdd[0] 2197723392 blocks level 5, 64k chunk, algorithm 2 [4/3] [UUU_] [root@storage ~]# mdadm --query --detail /dev/md2 /dev/md2: Version : 00.90.03 Creation Time : Sat May 12 17:22:30 2007 Raid Level : raid5 Array Size : 2197723392 (2095.91 GiB 2250.47 GB) Device Size : 732574464 (698.64 GiB 750.16 GB) Raid Devices : 4 Total Devices : 4 Preferred Minor : 2 Persistence : Superblock is persistent Update Time : Sun May 13 04:07:57 2007 State : clean Active Devices : 4 Working Devices : 4 Failed Devices : 0 Spare Devices : 0 Layout : left-symmetric Chunk Size : 64K UUID : 6a0d59e6:e00ec820:d08e477f:3b7ef9bc Events : 0.68 Number Major Minor RaidDevice State 0 8 48 0 active sync /dev/sdd 1 8 64 1 active sync /dev/sde 2 8 80 2 active sync /dev/sdf 0 0 0 0 removed 4 8 96 4 active sync /dev/sdg