I had a software raid 5 array with 4 one terrabyte disks under fedora 11, and attempted to add two new disks with mdadm:
# mdadm --add /dev/md127 /dev/sdf1
# mdadm --add /dev/md127 /dev/sdg1
# mdadm --grow --raid-devices=6 /dev/md127
During the reshape, about 2 hours in, there was some kind of system crash and under Palimpset the status of the array was shown as degraded, with 4 components.
Most of my data (but not all) had disapeared from the array.
I decided to reboot the computer to see if the reshape would start again of its own accord (this worked for me under different circumstances last time I grew my array). However, I could not get the computer to restart. It slowly gets to the screen just before the login window pops up (the screen showing the fedora logo inside the "speech bubble"), and then hangs there.
Is it reshaping the array in the background?
Should I leave it for a while to see if it gets to the login screen after this reshape would be completed? (The array was going to take about four days to reshape).
Is there something else that could be wrong. I didn't think the array would affect the operating system, as this is on a separate system disk.
P.S. I'm quite new to Linux, so if you need more info, I would be happy to provide.