#READYNAS DUO V2 VOLUME RESET HOW TO#

What can be done to minimize the chance of the failure? Any further failure results in a half-reshaped array which is a mess to fix and certainly beyond the abilities of automatic recovery.

#READYNAS DUO V2 VOLUME RESET HOW TO#

In practice, once the drive fails, accounting for what is where and how to recompute data from the parity suddenly gets complicated. Theoretically, the RAID is still redundant, because the reshape algorithm is designed to maintain redundancy throughout the process. However, a drive failure during expansion makes a rebuild tricky. Sudden power cuts are more of a problem, but the damage, if any, is usually well contained. A smart UPS can tell the NAS that the power is lost and the NAS then proceeds to shut itself down without any human intervention. It certainly does survive a normal shut down or an UPS-initiated shutdown. Normally, the expansion process survives the power outage. Expansion (also called reshape, because the array geometry is changed) requires every sector on every disk to be first read and then written to. All the disks of the original set must be in perfect shape before expansion. Is there anything I can do at this point?Įxpansion is a fragile process. Since there are two “failed” disks, the array is “dead’ and my data is gone. It says disk #3 - the one that appeared to fail this morning - is just gone. Now the NAS is telling me that disk #1… is “spare”, not part of the RAID array. The expansion process seemed to complete successfully… This morning one of my disks went bad…maybe due to a brief power outage…The NAS appeared to just be in a weird state, so I powered it off cleanly, restarted it, and told it to do another scan. A few weeks ago I replaced one of the disks in my ReadyNAS NVX with a larger one.

Readynas duo v2 volume reset