NVX, share content missing after vol chk, case 20484647

ahpsi wrote:
In my case I would note there have been several volume expansions. I believe I started with two 1.5 TB drives, added two 2 TB drives and then replaced all four with 3 TB drives.

I did one expansion two years ago, from 2x1TB to 3x1TB, without any problems.

ahpsi wrote:
Given what you have seen in your testing - is an NVX FS safe if no volume expansions have been performed? Would it be safe after a factory default with four identical drives in place?

It seems to be. The fsck was good on the 4x1TB volume across my 2x2TB and 2x1TB drives initially created by factory default.

ahpsi wrote:
What i'm trying to get at - is it the volume expansion that corrupts the file system such that the next run of FSCK causes the loss of data or will FSCK cause this regardless of whether or not the filesystem had been expanded? If it's the former it almost sounds like an X-RAID2 issue as I would assume vanilla EXT4 + FSCK should not equal loss of data in an otherwise good environment.

IMHO fsck is a very well tested tool. If it says that there are errors, there are errors. Thus, I think the expansion kills the volume, see the thread you linked in your original post http://www.readynas.com/forum/viewtopic.php?t=68890: "After the initial 4T volume was built [...] I decided to force an FSCK on reboot. That one came back clean. After the additional 1TB of space was added to the volume [...] I forced an FSCK on reboot and rebooted the NVX. Now it's come back with errors and the data volume is offline." Same thing happened to me, see my thread http://www.readynas.com/forum/viewtopic.php?t=69366 for details.