Re: RAID, number of disks supported

[Chris Murphy]

On Dec 22, 2012, at 3:52 PM, Chris Murphy <address@hidden> wrote:

> 
> On Dec 21, 2012, at 6:07 PM, Chris Murphy <address@hidden> wrote:
> 
>> I can consistently boot a /boot on md RAID 0, 1, 4, 5, 6 with 5 disks. At 
>> some point above that, at least by 8 disks, I get dropped to a grub rescue 
>> prompt with an error that it can't find 'mduuid/xxxxxxxxxxxxxxxxxxxxxxx'.
>> 
>> Does anyone know off hand what the max number of disk members supported is? 
>> Or is this a bug? It's either 6 or 7 apparently.
> 
> Looks like GRUB fails to boot from an array of 7 or more member drives.

Oh and the point of this is not so much that one should be able to boot from a 
7 disk array, but that an installer that allows /boot on the array might be 
best preventing installation of /boot on arrays of 7 disks or more since the 
reboot will fail.

Chris Murphy