On 06/03/13 02:06 PM, Gary Dale wrote:
On 06/03/13 01:55 PM, Dick Thomas wrote:
About.me http://about.me/dick.thomas
Blog: www.xpd259.co.uk
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gpg key: C791809B
On 6 March 2013 18:47, Adam Wolfe<kadamwo...@gmail.com> wrote:
I had one h**l of a time doing this over the weekend.
What finally worked for me was creating LOGICAL partitions on each
drive and
setting them as used for RAID volume devices.
This gave me /dev/sda5, /dev/sdb5 etc etc.
When grub did it's install, it added all the /dev/sda1 etc
partitions and
rebooted fine.
When I tried primary partitions, grub would just fail and I'd have to
restart the whole install process over.
NOTE: when booting from the install cd i had to [tab] the 'install'
menu
entry and add "dmraid=true".
Then after the initial install, it would still fail to boot.
Back to the install cd, choose 'rescue', [tab] and add 'dmraid=true'
again.
Then get thee to a shell and 'grub-install --recheck /dev/sdaX' for
each
partition.
On 03/06/2013 01:37 PM, Dick Thomas wrote:
What is the best way to setup a raid 5 array (4* 2TB drives)
should I make raid 5 for my system and /home
then raid 0 or 1 for the boot, or should I buy a 5th drive for
system/boot and install in the standard way?
as this is my 1st time on debian and not sure what would be best
Dick Thomas
About.me http://about.me/dick.thomas
Blog: www.xpd259.co.uk
G+: www.google.com/profiles/xpd259
gpg key: C791809B
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I've tried installing from my "hardware" motherboard raid and that
just fails even with dmraid=true
atm i've got a
raid 0 /boot
raid 5 encrypted then /lvm
/lvm/swap
/lvm/root
//var/log
but wasn't sure if that was the way to do it
or am I just confusing matters more :)
Do NOT use the hardware RAID. It's just a crippled form of software RAID.
Ignore the advice from Adam Wolfe - it's nonsense. Use the Debian
installer (advanced mode) to create the RAID 5 array on drives with
just one partition (whole disk) as /dev/md0. Then partition the RAID 5
array into / and /home. Install and reboot.
If you are using Wheezy this will work directly. If you are using
Squeeze then you may need to fix the UUID in /boot/grub.cfg.
I've done this successfully several times. It just works.
You can also boot from a live CD such as system rescue CD and create the
RAID array before installation. This allows you to use the normal
install path - just select /dev/md0 as the disk to install to, partition
it, and install.
I like to do this from the command line:
1) fdisk /dev/sda, ensure that there is only one whole-disk primary
partition on the drive (from 2048 to last sector on disk). Set type to "fd".
2) Repeat for all 4 drives.
3) mdadm --create /dev/md0 -n 4 -l 5 /dev/sda1 /dev/sdb1 /dev/sdc1 /dev/sdd1
then reboot into the Debian installer and proceed normally.
NOTE: the BIOS should have the drives set to AHCI, not RAID.
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