I added a new drive to my RAID 5. The grow process was successful after 12 hours and then the resize went well.
Next I added another drive to repeat the same process. The drive was recognized and the grow function started but
soon threw a communication error with no details. At this point the system was frozen and non-responsive from CLI or GUI.
After a hard boot It tried to recover the journal (I don't know if FSCK was successful) and my RAID has now disappeared.
I have disconnected the new drive that failed to grow and the system will boot but the pool with 6TB of data is missing.
Expert advice is welcomed.
Personalities : [raid6] [raid5] [raid4]
md127 : inactive sdf[0] sdg[5] sdd[4] sdc[3] sdb[2] sda[1]
11720301072 blocks super 1.2
unused devices: <none>