On Mon, Jan 11, 2010 at 12:52 PM, Carlos Williams <carloswill@xxxxxxxxx> wrote: > OK - I am once again attempting to use Arch install for 2010 on my > system which has two identical hard drives and I simply want to mirror > both drives in a RAID1 array. I have read the Wiki so much at this > point it has become memorized. I am NOT using LVM or anything, just a > Arch user who wants RAID1, very simple, right? Well wait, it gets > easier. I am not even attempting to add my MBR /dev/sda1 (/boot) to > the RAID1 array. Crazy simple, huh? You might even ask well why am I > even asking for help then...well because I hate the Arch installer and > not because its CLI only. No, I love the simplicity of the installer > and not being graphical but the RAID configuration is a complete mess. > > I am booting from a fresh 2009.08 Netinstall ISO disk. I select the > 1st option and login as root (requires no password). Before I just > junp into the installer (/arch/setup), I need to configure a few > things: > > 1 - I use 'cfdisk' to configure /dev/sda & /dev/sdb. > > - /dev/sda1 = 4096 MB (bootable) 83 > - /dev/sda2 = The rest of the disk (selecting 'fd' type) > > - /dev/sdb1 = 4096 MB (SWAP) 82 > - /dev/sdb2 = The rest of the disk (selecting 'fd' type) > > 2. I need to load my RAID1 modules using the following command: > > #modprobe raid1 > > 3. Now I need to create my RAID1 mirror using the following command: > > #mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/sda2 /dev/sdb2 > > 4. Check to make sure the RAID is rebuilding and both devices show [UU] > > #cat /proc/mdstat > > So now everything is working fine and going as it should be via the > Wiki. Now the Wiki in my opinion is way too bloated and tries to do > too much so I am cutting and pasting what I feel applies to me. Which > is why I am showing you everything I am doing here in this email to > see why I am failing. > > Now I need to update the /etc/mdadm.conf file with my new RAID1 I > created with the following command: > > #mdadm -D --scan >> /etc/mdadm.conf > > And I also verify that my info was correctly populated into the > /etc/mdadm.conf file using the following command: > > #cat /etc/mdadm.com > > So now I am ready to run the /arch/setup command from the CLI to > begine configuring the install / my new system. > > 1 - Select Source = I configure my install method and all my network variables > 2 - Set Clock = I configure my Time Zone and stuff > 3 - Prepare Hard Drive(s) = Here I can skip to section sub menu 3 > since I already did most of this above. I simply now just select mount > points for my existing partitions: > > sda1 = /boot (ext3) > sdb2 = swap (swap) > md0 = / (ext4) > > 4 - Select Packages = I select the base packages and what I feel is > required for my setup. > 5 - Install packages = I let the system download and install the > packages from my mirror. > 6 - Configure System = This is where I feel my confusion comes into > play. Perhaps I am missing something: > > */etc/rc/conf = I simply add the changes below: > - In 'Hardware' section add "MODULES=(md_mod raid) > - HOSTNAME="mypc" > - "sshd" added to the "DAEMONS" line > > */etc/mkinitcpio.conf > - add 'mdadm' on the 'HOOKS' line after "sata" & before "filesystems" > as noted in the Wiki. > > */etc/resolv.conf > - Check to make sure DNS looks good...it does. > > */etc/hosts > - Add my FQDN here as follows: > 127.0.0.1 mypc.mydomain.tld mypc > > *Root-Password > - Create a secure root password. > > Now that is it. I select 'Done' and let it build 'initcpio' images. > > 7 - Install Bootloader = Here I select "Grub" and then review the > default menu.lst it produces. I then select /dev/sda to install Grub > on. > "Grub was successfully installed" > > Now I am done and back at the bash shell logged in as root. > > I then run the following command: > > #cp -a /etc/mdadm.conf /mnt/etc/mdadm.conf to make sure when the > system boots, it is aware of my RAID1 mirror. > > Now I reboot because I assume I am done. > > Here is my error: > > ::Running Hook [mdadm] > Waiting 10 seconds for device /dev/md0 > > Root device '/dev/md0' doesn't exist, attempting to create it > ERROR: Failed to parse block device for ids for /dev/md0 > ERROR: Unable to detect or create root device /dev/md0 > You are being dropped into a recovery shell > Type reboot to reboot > Type exit to try and continue booting > > If the device /dev/md0 gets created while you are here, try adding > 'rootdelay=10 or higher to the kernel command line. > ramfs$ _ > In /etc/mkinitcpio.conf, add raid1 raid456 to the MODULES array and regenerate your initcpio image. That should fix it if it's the same (known ) problem that I think it is.
