On Thu, 30 Oct 2014 00:08:43 +0000 Wols Lists <antlists@xxxxxxxxxxxxxxx> wrote: > After my last shenanigans, I've now got my main system booting > successfully from a raid / partition. HOWEVER. > > I'm somewhat puzzled by grub.cfg, and this is in part behind why my dev > system won't boot raid properly, I think. Grub uses two different UUIDs!?!? > > One of them, (mduuid/...) is dead easy to find, "mdadm -D" gives the md > uuid of the array. But the other one, the "root=UUID=...", I'm damned if > I can find that id anywhere! Does anyone know a command, that will tell > me what that id is, so I can fix grub.cfg on my development system? blkid /dev/whatever > > (As an aside, how do I retrospectively force a name onto an array so > that I can guarantee it will be called /dev/md100, or /dev/mdhome, or > whatever? I daren't use the /dev/mdxxx name at the moment, because they > change and the result is a system that fails to boot, or is unusable, or > some other malarkey. Dead easy for me to fix, but my wife will go spare!) mdadm --assemble /dev/mdhome --update=name list-of-devices You cannot do this without stopping the array, sorry. Boot off a usb or CD is necessary. NeilBrown > > Cheers, > Wol > -- > 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
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