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Forum Discussion
Volume suddenly read-only
All of a sudden and out of nowhere, my volume has become read-only. The system does not show any errors and no disk malfunction. What the hell? I'm updating all my backups now, but what should I do ...
Re-sync completed and re-try at scrub self-aborted after 38 seconds. No reason given, no errors reported. So a little Googling suggested I start with the -B flag so it doesn't background it, and it then reported it aborted due to read-only file system. Which is odd, because btrfs property get /eda2 (my volume is eda2) returns ro=false.and the same is true of both sub-volumes. So I have more to learn about how a BTRFS filesystem is marked read-only.
All remaining tools appear to only work on an unmounted filesystem, and ReadyNASOS doesn't seem to want me to do that, so it's destroy and re-build for me.
But in my Googling, I did learn that a too-full volume can lead to it becoming read-only.. Could that be your issue? But that, of course, puts you in a catch-22, since you can't delete files from a too-full read-only volume. And doing a full restore from backup is going to put you right back where you were (or close, there may be a better data/metadata division that gets you by for a while).
Not it in my case. More than 70% free space. The problem arose one hour after deleting the LUN. Can quite put my finger on the cause of the problem.
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