From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Hardy Subject: Re: /dev/md* Device Files Date: Wed, 26 Jan 2005 15:51:12 -0800 Message-ID: <41F82CF0.8080206@h3c.com> References: <200501260841.59090.andrew@walrond.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Steve Witt Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids Q: How do you make devices persistent in udev, so they stop getting created dynamically? A: you can cd into /dev/ and ./MAKEDEV md, then cp /etc/md* to /etc/udev/devices/ then they'll reappear on boot. I wasted some time on this prior (I have a hot-swappable ide/cdrom drive and cd-burning stopped working when I went from RH9 to FC3, thanks udev!) Works for me, anyway. Hope it helps -Mike Steve Witt wrote: > On Wed, 26 Jan 2005, Andrew Walrond wrote: > >> On Wednesday 26 January 2005 07:28, Gordon Henderson wrote: >> >>> On Tue, 25 Jan 2005, Steve Witt wrote: >>> >>>> I'm installing a software raid system on a new server that I've just >>>> installed Debian 3.1 (sarge) on. It will be a raid5 on 5 IDE disks >>>> using >>>> mdadm. I'm trying to create the array with 'mdadm --create /dev/md0 >>>> ...' >>>> and am getting an error: 'mdadm: error opening /dev/md0: No such >>>> file or >>>> directory'. There are no /dev/md* devices in /dev at the present >>>> time. I >>>> do have the md and raid5 kernel modules loaded. My question is: how do >>>> the /dev/md* files get created? Are they normal device file that are >>>> created with MAKEDEV? >>> >>> >>> It's odd that they aren't there - they are with Debian 3.0, and have >>> remained there when I've upgraded a few test servers to testing/Sarge. >>> >>> # cd /dev >>> # ./MAKEDEV md >>> >>> should do the business. >>> >> >> A useful trick I discovered yesterday: Add --auto to your mdadm >> commandline >> and it will create the device for you if it is missing :) >> > > Well, it seems that this machine is using the udev scheme for managing > device files. I didn't realize this as udev is new to me, but I probably > should have mentioned the kernel version (2.6.8) I was using. So I need > to research udev and how one causes devices to be created, etc. > > Thanks for the help!! > > > - > 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