From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alessio Palmero Aprosio Subject: Problem Date: Sun, 21 Jan 2007 03:05:22 +0100 Message-ID: <45B2CA62.7050000@apnetwork.it> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15; 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 to all! I have a strange problem with Raid. I admit I'm quite a newbie in RAID, because I usually used it but never had problems. Now I had one. I have a server with a RAID1, in particular two 80gb SATA disks (/dev/sda and /dev/sdb). In each of them there are two partitions: a 500mb swap partition and a 79 gb raid partition. I create /dev/md0 from the two and I have now the array working well. I had a problem with one of them (/dev/sda) and I decide to leave sdb alone during the time I need to change sda. So I installed grub in sdb (as in http://gentoo-wiki.com/HOWTO_Gentoo_Install_on_Software_RAID#Installing_Grub_onto_both_MBRs) and I put it alone. All works perfectly. After some time, I noticed that sdb too has the problem, and then I discovered that the problem wasn't in the disks, but in another place, and I solved it. I put sda again and I rebuild the array. Now, whenever I reboot the computer I have to rebuild the array. I tried 3 times and all the times the Raid only found a disk and I have to execute mdadm --manage /dev/md0 -a /dev/sdb2 and then all works. This is my mdadm -D /dev/md0 ----------------------------------------------------------- /dev/md0: Version : 00.90.01 Creation Time : Thu Oct 20 19:07:57 2005 Raid Level : raid1 Array Size : 79505600 (75.82 GiB 81.41 GB) Device Size : 79505600 (75.82 GiB 81.41 GB) Raid Devices : 2 Total Devices : 2 Preferred Minor : 0 Persistence : Superblock is persistent Update Time : Sun Jan 21 03:03:27 2007 State : clean Active Devices : 2 Working Devices : 2 Failed Devices : 0 Spare Devices : 0 UUID : 224a5dd6:1f81f7c4:d8c8c9f1:08088420 Events : 0.20140867 Number Major Minor RaidDevice State 0 8 18 0 active sync /dev/sdb2 1 8 2 1 active sync /dev/sda2 ----------------------------------------------------------- and my /proc/mdstat ----------------------------------------------------------- Personalities : [raid0] [raid1] [raid5] md0 : active raid1 sdb2[0] sda2[1] 79505600 blocks [2/2] [UU] unused devices: ----------------------------------------------------------- How can I solve the problem? Thans very much Alessio Palmero (from Italy)