Hi Mikael

Thanks for the reply

On Sat, May 24, 2014 at 11:36 AM, Mikael Abrahamsson [off-list ref] wrote:

On Fri, 23 May 2014, Marnitz Gray wrote:

quoted

Hello good people of linux-raid.

Your output seems to indicate that you have one drive with an event count
that is 6 events off the others. This most likely means it's safe to use
--assemble --force in order to make this get accepted.

Thanks, as per my original email I get an error message: "...assembled
from 3 drives and 1 spare - not enough to start the array ". Am I
doing something wrong?

You didnt' state if you had space for more drives in your system, but you
seem to have a recent mdadm and hopefully then a recent kernel, hook up the
new drive to the system at the same time as the old one, add it as a spare,
and use mdadm --replace. Then it'll online-replace the drive you want to
change without degrading the array. This is a lot safer procedure.

Thanks. I do not have space for any other drives in the system.
I did not know about --replace, in hindsight I should've done some
research first! Thanks for the info though!

Also consider going RAID6 if at all possible, you could do that when you're
done replaceing all the drives with 3TB ones.

Thanks again, the plan was to replace all the drives and then convert
it to raid 6.

--
Mikael Abrahamsson    email: swmike@swm.pp.se

Regards,
Marnitz Gray