On Tue, Mar 08, 2022 at 10:31:32AM +1100, Dave Chinner wrote: > On Tue, Mar 08, 2022 at 06:46:58AM +0800, David Dal Ben wrote: > > This is where I get out of my depth. I added the drives to unraid, it > > asked if I wanted to format them, I said yes, when that was completed > > I started migrating data. > > > > I didn't enter any XFS or disk commands from the CLI. > > Is there any sort of verbose logging you can turn on from the > applicance web interface? > > > > > What I can tell you is that there are a couple of others who have > > reported this alert on the Unraid forums, all seem to have larger > > disks, over 14tb. > > I'd suggest that you ask Unraid to turn off XFS shrinking support in > the 6.10 release. It's not ready for production release, and > enabling it is just going to lead to user problems like this. > > Indeed, this somewhat implies that Unraid haven't actually tested > shrink functionality at all, because otherwise the would have > noticed just how limited the current XFS shrink support is and > understood that it simply cannot be used in a production environment > yet. > > IOWs, if Unraid want to support shrink in their commercial products > right now, their support engineers need to be testing, triaging and > reporting shrink problems to upstream and telling us exactly what is > triggering those issues. Whilst the operations and commands they are > issuing remains hidden from Unraid users, there's not a huge amount > we can do upstream to triage the issue... I'm not sure if it can reproduce on other distribution or it's just a specific behavior with unraid distribution, and it seems that this distribution needs to be paid with $ to get more functionality, so I assume it has a professional support team which can investigate more, at least on the userspace side. In the beginning, we've discussed informally if we needed to add another "-S" option to xfs_growfs to indicate the new shrink behavior for users. And the conclusion was unnecessary. And I think for the case mentioned in the original thread, it didn't actually do anything. Thanks, Gao Xiang > Cheers, > > Dave. > -- > Dave Chinner > david@xxxxxxxxxxxxx
