active(auto-read-only)

Hi,

I'm currently having issues with a raid array being marked as
active(auto-read-only).  It's a raid 5 array of 4 disks plus a 1 hot
spare.  I was attempting to grow it to use all 5 disks when my server
hung, just after it backed up the critical sector information.  Now, I've
seen people on this list being told do  mdadm /dev/md0 --readwrite. 
Unfortunately this just causes my machine to hang again.

Does anyone have any suggestions?

Regards,

Ewan.