I’m having trouble configuring RAID 1 on IBM X3250-M4 server, because I’m actually a programmer, not a system admin. So, i went to google, and find out that the RAID controller on board the server is FAKE-RAID, oh my.
Google sent me to this following URL, which helped me to configure my server into RAID1 Proxmox VM Server, using software MDRAID.
http://boffblog.wordpress.com/2013/08/22/how-to-install-proxmox-ve-3-0-on-software-raid/ and
http://blog.bravi.org/?p=1100
The difference is, my server use disk with GPT, and UEFI. i have 2 disks, which is /dev/sda and /dev/sdb.
So this is the step i made : (before trying out to the real server, you can install proxmox in virtualbox as trial server)
Install proxmox into /dev/sda
i do not have a valid subscription for proxmox, so i edit the source list
vim /etc/apt/sources.list.d/pve-enterprise.list
and comment the following line
#deb https://enterprise.proxmox.com/debian wheezy pve-enterprise
Updating installed promox
apt-get update
apt-get dist-upgrade
Install the softwares
apt-get install vim initramfs-tools mdadm
mdam installer will ask you some question, just click OK with no modification
copy the partition table from /dev/sda to /dev/sdb
sgdisk -R=/dev/sdb /dev/sda
you can check the partition number using
gdisk -l /dev/sdb
change partition /dev/sdb2 (boot) and /dev/sdb3 (lvm) to Software RAID
sgdisk -t 2:fd00 /dev/sdb
sgdisk -t 3:fd00 /dev/sdb
Initialize the RAID
mdadm –create /dev/md1 –level=1 –raid-disks=2 missing /dev/sdb2
mdadm –create /dev/md2 –level=1 –raid-disks=2 missing /dev/sdb3
Copy the /boot from /dev/sda2 to the newly created /dev/md1
mkfs.ext3 /dev/md1
mkdir /mnt/md1
mount /dev/md1 /mnt/md1
cp -ax /boot/* /mnt/md1
Edit the fstab file
vim /etc/fstab
In the line containing UUID
Example. UUID=c8ac59b8-ce54-4fca-8107-1b04aaa0194d /boot ext3 defaults 0 1
we replace the UUID part with /dev/md1
/dev/md1 /boot ext3 defaults 0 1
Then
reboot
After reboot, check with command
mount | grep boot
should be showed like
/dev/md1 on /boot type ext3 (rw,relatime,errors=continue,user_xattr,acl,barrier=0,data=ordered)
Now continuing to tell GRUB that we want to boot from /dev/md1
echo ‘GRUB_DISABLE_LINUX_UUID=true’ >> /etc/default/grub
echo ‘GRUB_PRELOAD_MODULES=”raid dmraid”‘ >> /etc/default/grub
echo raid1 >> /etc/modules
echo raid1 >> /etc/initramfs-tools/modules
grub-install /dev/sda
grub-install /dev/sdb
update-grub
and the following command can make your system unbootable
update-initramfs -u
Add the /dev/sda2 to the RAID, first, change the type to software RAID
sgdisk -t 2:fd00 /dev/sda
add to RAID
mdadm –add /dev/md1 /dev/sda2
Move the LVM to /dev/md2
pvcreate /dev/md2
vgextend pve /dev/md2
pvmove /dev/sda3 /dev/md2
Except your disk size less than 100GB, You can now go to sleep, or go to nearby coffeshops, as this steps will take some time depending on the CPU and disk size.
Continue the PVE removal
vgreduce pve /dev/sda3
pvremove /dev/sda3
Change the partition of LVM /dev/sda3 to Software RAID
sgdisk -t 3:fd00 /dev/sda
Add to RAID
mdadm-add /dev/md2 /dev/sda3
and check the process
cat /proc/mdstat
The rest of the process is i tried simulating the removal of disk 0, start the server, run with only disk 1, insert the disk 0 again, and yes it works.
if you having problem while attach new disk, to replace the failed disk, you can check this following URL :
Articoll 