On Fri, 15 Mar 2013 12:07:47 +0100 (CET)
Roy Sigurd Karlsbakk [off-list ref] wrote:

quoted

What happened was:
- a device (sdg1) was added as a write-mostly member to a degraded
two-member RAID1 (md3) and started recovering;

May I be so frank as to guessing you found an old drive and added as write-mostly? sdg is the bad drive here…

This is correct, but I should note that I did not add it as write-mostly just
because it's an older drive, but because it is my normal set-up for md3:
a RAID1 mirror of a fast SSD (sdf) and a write-mostly HDD (sdg in this case).

-- 
With respect,
Roman