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Bug#610359: d-i rc1 fails on software raid system

On Mon, Jan 17, 2011 at 10:51:14PM +0100, Giuseppe Sacco wrote:
> Package: installation-reports
> Boot method: DVD from external DVD reader with USB connection
> Image version: http://cdimage.debian.org/cdimage/squeeze_di_rc1/amd64/iso-cd/debian-sq-di-rc1-amd64-netinst.iso
> Date: 17 January 2011
> Machine: DELL OptiPlex 780 SF
> Processor: Intel E7500
> Memory: 2Gb
> Partitions:
> Output of lspci -knn (or lspci -nn):
> Base System Installation Checklist:
> [O] = OK, [E] = Error (please elaborate below), [ ] = didn't try it
> Initial boot:           [O]
> Detect network card:    [O]
> Configure network:      [O]
> Detect CD:              [ ]
> Load installer modules: [O]
> Detect hard drives:     [O]
> Partition hard drives:  [O]
> Install base system:    [O]
> Clock/timezone setup:   [O]
> User/password setup:    [O]
> Install tasks:          [O]
> Install boot loader:    [E]
> Overall install:        [E]
> Comments/Problems:
> this machine have two sata disks connected to a intel software raid
> controller. The two disks have been connfigured as one logical disk in
> mirror using the controller BIOS.
> The linux install has been started with "dmraid=true" option and the
> logical disk has been correctly detected and configured.
> When the bootloaded has to be installed, grub-pc was selected and
> proposed to install itself on mbr since no other OSes were detected. I
> pressed OK and the grub installation failed with a message like 'cannot
> setup grub on /dev/sda'. This is correct since /dev/sda should not be
> used because it is part of the /dev/mapper/isw_XXXXXXX_ARRAY.
> Reading the documentation I found that grub2 does not support this kind
> of raid controller, nor lilo does. So, it seems Debian cannot be
> installed at all on such system.

Correct.  dmraid is not supported (it's experimental).

However, mdraid supports intel raid now it seems, so perhaps it you try
that it will work.

grub2 does have the current question of how to tell if an md raid is
pure software, or intel fake raid.  Not sure that has been resolved yet.

Len Sorensen

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