On Thu, Jul 09, 2009 at 10:34:13AM +0700, Vilasith Phonepadith wrote:
>
> I am trying with LVM+RAID, and I did some tests. I need your help for the
> installation of Lenny.
>
> Problem: I have to install Debian with the requirements as follow:partition:
> use the system of LVM for partitionning the serversif possible on the Disk
> RAID1 Mirroring
> I don't understand well and don't know how to start. Which one should be done
> first, after or at the same time.
> If we install by default, it's alright. But now, with LVM+RAID, it's
> something different for me.
Make the LVM run on top of RAID. This works perfectly, and I use it
on several systems. It all works through the debian installer.
1) Partition disks
Give both disks the same partition layout:
p1: (/boot) 200MiB is plenty for several kernels and initrds.
But you could make it 500MiB to be extra safe.
p2: (RAID) use the rest of the available space
2) Set up software RAID
Assuming your discs are /dev/sda and /dev/sdb, sda2 and sdb2 will
be your RAID set. Just choose them when setting up RAID.
3) Configure LVM
Start by creating a new physical volume (PV). Choose your raid
device (/dev/md0) created in the previous step as the PV.
Next, create a volume group (VG). I normally give it the same
name as the machine hostname.
Then, create the logical volumes (LVs) for / (root), /usr, /var,
/home, /srv and any other volumes you need. Also create any
swap partitions you like. I normally create a series of 2GiB
LVs swap0, swap1, ... swapn but I think the 2GiB size limit is gone
now.
4) Set up the filesystems
In the partitioner, set /dev/sda1 as /boot. /boot needs to be
separate from the RAID+LVM setup in order to be accessible by the
bootloader, though it's possible grub2 will fix this at some point.
Keeping it separate is safe and recommended.
Configure all of your LVs by choosing the filesystem type and mount
point. For Lenny I'd go with ext2 for /boot and ext3 for everything
else.
5) Continue
It's all done now, just carry on with the installation as usual,
and it should all Just Work.
Regards,
Roger
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