Bug#554500: grub-pc doesn't work with metadata 1.0 md device

[Michel Meyers]

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On 2009-11-05 12:33, Felix Zielcke wrote:
> Am Donnerstag, den 05.11.2009, 00:27 +0100 schrieb Michel Meyers:
>> Package: grub-pc
>> Version: 1.97-1
>> Severity: normal
>>
>> Not sure if this is documented anywhere (just spend a few hours on this and Google didn't come up with anything) but grub-pc doesn't work with md devices when they are using metadata 1.0. Even after doing insmod raid and insmod mdraid, the devicesi simply don't show up. grub-install keeps comlaining that 'no mapping exists for' the mdX device.
>>
>> I was just giving up on grub and trying to switch to LILO, which immediately complained about the metadata version, so I tried recreating the device with 0.90 metadata in the superblock and sure enough, that made grub find it correctly.
> 
> It's only "documented" in this wishlist bug report:
> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=492897

Hmm, OK. Sorry for the duplicate report, that one didn't come up in my
searches.

> We check already the version in the superblock and print out an error if
> it's not 0.90.

Strangely enough, I did not get any error other than the one noted
(stating that there was no mapping for md3). Only LILO complained (that
it wanted 0.90 instead of 1.0 on the raid), prompting me to try the same
thing for Grub. (If Grub had complained right away, it would've saved me
an hour of searching.)

I'm curious. What would that message look like? Maybe I missed it?

- - Michel
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