On 11/25/2010 11:26 AM, John Sheu wrote: > What's the preferred way to differentiate BIOS fakeraid from regular > software mdraid? > > I ask this as I'm booting with GRUB2 off a system that has one of > those Intel fakeraid chipsets. As of a few months ago, the mdadm > package has supported these fakeraid setups, so the RAID array comes > up as a /dev/md### device. This is unfortunate, as GRUB2 assumes that > any device of the type /dev/md### must be a pure software RAID device, > and in util/grub-setup.c:939, tries to install itself to the RAID > members individually: > Right now GRUB2 is unable to distinguish between 2 cases. However you can inform it that you have scamraid by adding following line to device.map: (hd0) /dev/md0
> if (0 && dest_dev[0] == 'm' && dest_dev[1] == 'd'
> && ((dest_dev[2] >= '0' && dest_dev[2] <= '9') || dest_dev[2] == '/'))
> {
> char **devicelist;
> int i;
>
> devicelist = grub_util_raid_getmembers (dest_dev);
>
> for (i = 0; devicelist[i]; i++)
> {
> setup (arguments.dir ? : DEFAULT_DIRECTORY,
> arguments.boot_file ? : DEFAULT_BOOT_FILE,
> arguments.core_file ? : DEFAULT_CORE_FILE,
> root_dev, grub_util_get_grub_dev (devicelist[i]), 1,
> arguments.force, arguments.fs_probe);
> }
> }
>
> For a fakeraid setup, however, the BIOS presents the entire device as
> "regular" int13 device, so GRUB2 really should be installing it to the
> entire /dev/md### device, not the individual members.
>
> So what's the preferred way to differentiate BIOS fakeraid? Is there
> some ioctl that would make this easier than having to parse /proc/mdstat?
>
> Thanks,
> -John Sheu
>
>
> _______________________________________________
> Grub-devel mailing list
> [email protected]
> http://lists.gnu.org/mailman/listinfo/grub-devel
>
--
Regards
Vladimir 'φ-coder/phcoder' Serbinenko
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