From mboxrd@z Thu Jan 1 00:00:00 1970 From: jahammonds prost Subject: Re: trouble creating array Date: Sun, 25 Feb 2007 18:56:29 -0800 (PST) Message-ID: <540638.44700.qm@web55810.mail.re3.yahoo.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: Justin Piszcz Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids > Do you have an active md array? > > mdadm -S /dev/md0 Nothing was showing up in /proc/mdstat, but when I try and stop md0, I get this # mdadm -S /dev/md0 mdadm: stopped /dev/md0 > lsof | egrep '(sdb|sdc)' I had tried that before, and nothing is showing. A reboot didn't help, but something is definately keeping it open. I tried an mkfs ]# mkfs.ext3 /dev/sdb1 mke2fs 1.39 (29-May-2006) /dev/sdb1 is apparently in use by the system; will not make a filesystem here! Any ideas how to find out what has it open? I can happily write all over the disk with dd... I can create and delete the partition, and it's all good... I will try deleting the sd{b,c}1 partitions, reboot, and see what happens. Graham ----- Original Message ---- From: Justin Piszcz To: jahammonds prost Cc: linux-raid@vger.kernel.org Sent: Sunday, 25 February, 2007 5:35:33 PM Subject: Re: trouble creating array On Sun, 25 Feb 2007, jahammonds prost wrote: > Just built a new FC6 machine, with 5x 320Gb drives and 1x 300Gb drive. Made a 300Gb partition on all the drives /dev/hd{c,d,e} and /dev/sd{a,b,c}... Trying to create an array gave me an error, since it thought there was already an array on some of the disks (and there was an old one). > > I decided to clear off the superblock on the drives with mdadm --zero-superblock on all the drives. It worked fine on all drives, except for /dev/sd{b,c)1, which returns an error "mdadm: Couldn't open /dev/sdb1 for write - not zeroing". There doesn't seem to be a problem with the drive, as I've run a non destructive badblocks on it, and also done a dd if=/dev/zero of=/dev/sdb1 on it, and Ive written out 300Gb onto the partition. > > When I try and create an array using these 2 partitions, I get an error > > mdadm: Cannot open /dev/sdb1: Device or resource busy > mdadm: Cannot open /dev/sdc1: Device or resource busy > > and it aborts. I've double checked that the drives aren't mounted anywhere. There's nothing in /var/log/messages either... > > Any suggestions where to check next? > > > > Graham > > > > ___________________________________________________________ > To help you stay safe and secure online, we've developed the all new Yahoo! Security Centre. http://uk.security.yahoo.com > - > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Do you have an active md array? mdadm -S /dev/md0 mdadm -S /dev/md1 mdadm -S /dev/md2 .. etc lsof | egrep '(sdb|sdc)' Something thinks its in use, that is why you cannot format it/make it part of a new array, a reboot would also fix the problem. Justin. ___________________________________________________________ To help you stay safe and secure online, we've developed the all new Yahoo! Security Centre. http://uk.security.yahoo.com