[NCLUG] sw raid, recovery after install

[Stephen Warren]

On 01/17/2013 04:35 AM, Michael Milligan wrote:
> On 01/16/2013 11:06 PM, Bob Proulx wrote:
...
>> Array mismatches occur during normal operation of the array even with
>> perfect drives.  It is annoying that the check produces chatter but it
> 
> Huh?  If that's true then you should run screaming for the door...
> seriously.  That's violating the data integrity and redundancy that RAID
> is supposedly giving you.

This is well-known behaviour of Linux MD and was mentioned earlier in
this thread IIRC. Basically, if the writes are scheduled, then the file
deleted before the writes are sent to the disk due to write buffers,
then the outstanding writes are cancelled. They may hit one disk but not
the other.

Now, this is going to happen mostly on your /var or related system
partition. It's much much less likely on a partition that's purely
storing archive material, since that kind of access pattern doesn't
usually occur there.