Re: raid1 issue, somewhat related to recent "debian on big machines"

[Goswin von Brederlow <goswin-v-b@web.de>]

Alex Samad <alex@samad.com.au> writes:

> On Wed, Mar 11, 2009 at 09:53:14AM +0100, Francesco Pietra wrote:
>> To my dismay, I tried (repeatedly) unsuccessfully to implement the
>> scheme below on old Tyan S2895 with two dual-opteron and two new
>> Maxtor 250GB, before moving to the new machine. With the recent amd
>> installer, I tried to set up (manually) the two partitions on both
>> disks to set up raid1.
>> 
>> First, I tried with a 0.2GB partition for boot but I found no way to
>> have lvm for the other partition and where to set the root file
>> system.
>> 
>> Then, I tried with a 1GB partition but found no way to have it for
>> both boot and root.
>
> from memory but the outline of who I install
>
> Create 3 paritions 1 2 3 on sda and sdb of 500M 10G (this is going to be
> raid1) the rest of the hard drive
>
> select all the partitions to be a raid device
>
> configure raid
> md0 = sda1 sdb1
> md1 = sda2 sdb2
> md2 = sda3 sdb3
>
> select md0 as type ext2 mount /boot
> select md1 as type ext3 mount /
> select md2 as type lvm device

If you have a seperate / then you don't need /boot and 10G for /
without /home, /usr, /var (see below) is way too big.

> configure lvm
>
> ... create your lvm partitions ....
> select each one and specify fs type and mount point
>
> then proceed

The tricky part I think is that you have to configure the partitions
to be used for raid before you can actualy create a raid. Then you
have to configure the raid devices to be used for lvm before one can
actualy create the lvm stuff. It makes raid/lvm kind of hidden.

MfG
        Goswin