On Jan 3, 2014, at 4:25 PM, Jim Salter <j...@jrs-s.net> wrote:

> 
> One thing that concerns me is that edits made directly to grub.cfg will get 
> wiped out with every kernel upgrade when update-grub is run - any idea where 
> I'd put this in /etc/grub.d to have a persistent change?

/etc/default/grub

I don't recommend making it persistent. At this stage of development, a disk 
failure should cause mount failure so you're alerted to the problem.

> I have to tell you, I'm not real thrilled with this behavior either way - it 
> means I can't have the option to automatically mount degraded filesystems 
> without the filesystems in question ALWAYS showing as being mounted degraded, 
> whether the disks are all present and working fine or not. That's kind of 
> blecchy. =\

If you need something that comes up degraded automatically by design as a 
supported use case, use md (or possibly LVM which uses different user space 
tools and monitoring but uses the md kernel driver code and supports raid 
0,1,5,6 - quite nifty). I haven't tried this yet, but I think that's also 
supported with the thin provisioning work, which even if you don't use thin 
provisioning gets you the significantly more efficient snapshot behavior.

Chris Murphy--
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