software raid

[Phillip Susi]

What's with the triplicate posts?

Jérémie wrote:
> Hi Carl,
>
> I've spent quite some time on this questions, done much googling, and
> made boot tests with both lilo and grub... here's what came out of those
> experiments
>
> Note: this was under Debian as it is still my OS of choice for
> servers... may be Dapper will change this ;)
>
> 1) 1 device/1 PCI channel, all masters, _don't_ mess with this, PCI IDE
> cards are really cheap !
>
> 2) Partitionning: I do LVM on RAID the following way:
>    - /boot: RAID1, each partition have the bootable flag set
>    - SWAP: RAID1
>    - The rest is LVM logical volumes above RAID1 or RAID5 array(s):
>      /, /usr,
>      /usr/local, /opt,
>      /var, /var/log, /tmp,
>      /home, /srv
>    - All disks have exactly the same partition table, so on configs
> with more than 2 disks, I add spare partitions to /boot and swap arrays.
> Further, this leverage sfdisk power for initial partitionning of new
> disks...
>    - Note that, AFAIC, a question remain at this point. I couldn't yet
> figure what is the best strategy between creating one global VG or
> several one... any insight or experience about this warmly appreciated :)
>    - All this is initially done with partman in the d-i without
> trouble... just a warning at some point saying that the partition table
> has changed (during LVM setup), but you can safely ignore, this seems to
> be a d-i bug)
>
> 3) Installing bootloader
>   a) With LiLo:
>     - you have to install it with the d-i, on /dev/md0 in my setup,
> when asked if you want to activate it, say no, process ends with an
> error... ignore
>     - switch to VC2, edit /target/etc/lilo.conf, check that
> boot=/dev/md0 add add raid-extra-boot=mbr-only just after, save it
>     - chroot /target; lilo -v
>     - ctrl+d to get out of chroot
>   b) With GRUB:
>     - install GRUB with the d-i on /dev/md0
>     - switch to VC2
>     - On a RAID1 setup with master disks on prim and sec IDE channels:
>       # grub
>       > device hd(0) /dev/hda
>       > root hd(0,0)
>       > setup hd(0)
>       > device hd(0) /dev/hdc
>       > root hd(0,0)
>       > setup hd(0)
>       > quit
>
> Thanks for your comments
>
> Bests
>
> Jé
>
>