Hi Neil, On Tue, Sep 16, 2014 at 07:54:58AM +1000, NeilBrown wrote: > On Mon, 15 Sep 2014 17:12:52 +0000 Andy Smith <andy@xxxxxxxxxxxxxx> wrote: > > On Mon, Sep 15, 2014 at 05:00:37PM +1000, NeilBrown wrote: > > > mdadm --zero-super --metadata=0.90 /dev/sda3 > > > > > > will remove any 0.90 metadata. > > > > Trying that whole the array is running: > > > > mdadm: Couldn't open /dev/sda3 for write - not zeroing > > > > This needs to be done with the array stopped, presumably? > > It's preferred, but if you are really confident (and I think you are), then > adding --force is justified and should make it work. Yep, that worked, thank you! No more complaints from grub-probe. Do you consider it a bug that mdadm does not zero the old metadata when upgrading it to a new version? Or do you consider it a documentation issue to explain that it may be necessary to manually do it? I think I would've liked grub-probe at least in verbose mode to say which version of metadata it was reading from where. That would've been immediately enlightening, so I'll see if they would accept a patch for that… Cheers, Andy -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
