Also, maybe the output of: cat /proc/mdstat On Tue, Nov 15, 2022 at 1:46 AM Russell Senior <[email protected]> wrote:
> It says it's already mounted. Can you post the results of a plain mount > command? That is, show what the system thinks is mounted. > > On Tue, Nov 15, 2022 at 12:14 AM John Jason Jordan <[email protected]> wrote: > >> A couple hours ago PGE did it to me again. This happens every couple of >> months. The lights flickered off, and then immediately came back on. >> Now, I have three massive APC backup units that run everything, even >> the stereo. I mean, all the network components, both computers, the >> Lenovo dock and everything connected to it. And when the power failed >> they all remained running, except the enclosure that holds four 8TB >> NVMe drives in RAID0 to give me a 32TB mdadm device, known as md0p1. It >> auto-mounts via a line in fstab. >> >> Unfortunately, after the power glitch I cannot access anything on the >> device. The GUI file managers (PCManFM, Thunar, etc.) displayed the >> folders, but the contents were blank. I could open a text file in >> mousepad, but I could not save it because it was read only. How this >> happened is a mystery; before the power glitch it was mounted r/w, as >> it always is. >> >> After a couple hours of trying to fix the problem I have managed to >> umount the device. However, attempting to remount it has failed: >> >> sudo mount -a >> mount: /media/jjj/Movies: /dev/md0p1 already mounted or mount point busy >> <note: it was not mounted> >> <the fstab line is: >> UUID=09ed8807-e45a-4dac-8f4b-5ad9a07be90a /media/jjj/Movies auto >> nosuid,nodev,nofail,x-gvfs-show,user 0 0) >> >> sudo mount /dev/md0p1 /media/jjj/Movies >> mount: /media/jjj/Movies: /dev/md0p1 already mounted or mount point busy >> <note: it was not mounted> >> >> I also tried lsof, hoping that it might tell me what was hanging things >> up, but I couldn't understand the results: >> >> sudo lsof /dev/md0p1 >> lsof: WARNING: can't stat() fuse.gvfsd-fuse file system >> /run/user/1000/gvfs Output information may be incomplete. >> lsof: WARNING: can't stat() fuse.portal file system /run/user/1000/doc >> Output information may be incomplete >> >> Final note: This is not the first time that this device has given me >> grief. From past experience, if I reboot the computer it comes back >> fine. At the moment I don't want to reboot. But if rebooting fixes the >> problem, it makes me suspect mdadm. >> >> Suggestions welcome! >> >
