[CentOS] DegradedArray message

Tue Dec 9 02:11:03 UTC 2014
David McGuffey <davidmcguffey at verizon.net>

On Thu, 2014-12-04 at 16:46 -0800, Gordon Messmer wrote:
> On 12/04/2014 05:45 AM, David McGuffey wrote:

> In practice, however, there's a bunch of information you didn't provide, 
> so some of those steps are wrong.
> 
> I'm not sure what dm-0, dm-2 and dm-3 are, but they're indicated in your 
> mdstat.  I'm guessing that you made partitions, and then made LVM or 
> crypto devices, and then did RAID on top of that.  If either of those 
> are correct, that's completely the wrong way to build RAID sets.  You 
> risk either bad performance from doing crypto more often than is 
> required, or possibly corruption as a result of LVM not mapping blocks 
> the way you expect.
> 
> If you build software RAID, I really strongly recommend that you keep it 
> as simple as possible.  That means a) build sofware RAID sets from raw 
> partitions and b) use as few partitions as possible.
> 

Gordon,

Agree, I've probably made it too complicated. It is a workstation with
sensitive data on it so I've encrypted the partitions.

md1 is fairly simple...two large disks in raid1, encrypted, and mounted
as /home.

md0 is probably way too complicated and not a good way to go.  The
sensitive data in md0 is in /var (virtual machines).

I've backed up both /home and /var/lib/libvirt/images, so I think I'll
start over on md0 with a new disk and a fresh install.

Dave