I have not logged in for about a week after updating to v0.2.6 but now the drives in my refined storage system are showing that they have no storage, not just empty, like they aren't there.

The disks still have their ID in their NBT data, but I'm not sure what I can do to resolve this. A newly crafted disk shows how many items it has and the disk drive registers that there is a disk in it.

All disks on the server seem to be affected

It looks as though this was caused by a power outage we had. I restored the refined storage data files from a backup from before the outage and the issue was resolved