From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ron Leach Subject: 'resync=PENDING', 'auto-read-only' on raid1 creation Date: Sat, 04 Jan 2014 13:28:33 +0000 Message-ID: <52C80C81.3040004@tesco.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Sender: linux-raid-owner@vger.kernel.org To: Linux RAID Mailing List List-Id: linux-raid.ids List, good afternoon, I've recently needed to create a new raid1 array in an existing (non-raid) Debian Wheezy system. The array has been created read-only, and resync is PENDING; I didn't expect either of these conditions. Objective is to have an LVM built initially on mirrored unused 2TB drives, with a view to growing the LVM with mirrored 3TB drives in the future. The Logical volume will be exported over NFS, and will serve as a repository for backups of other machines. The approach I am following is, first, to create a raid1 array then, second, install an LVM over that array, making sure that I create the LVM such that it can be expanded. (I think) I've created a raid1 on two empty and unpartitioned 2TB drives, but am not seeing the results that the wiki (https://raid.wiki.kernel.org/index.php/RAID_setup) seems to suggest. # cat /proc/mdstat reports md0 : active (auto-read-only) raid1 sdc[1] sdb [0]' 1953383360 blocks super 1.2 [2/2] [UU] resync=PENDING This was the create command I used: # mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/sdb /dev/sdc I've read through man mdadm but had not expected 'auto-read-only', nor 'resync=PENDING'. Has something gone wrong, for some reason? Or do I need, simply, to set the array to be read-write? I wondered whether 'create' does not 'start' the array, but it's reported as 'active', so I think the array is started. I have not yet put a filesystem on the array, because I am not sure the creation is ok. Grateful for any comment, and apologies for what must seem a very basic question, regards, Ron