Hi everybody,
thanks a lot for your work.
On my laptop (Ubuntu 19.10, Kernel 5.5.7, VirtualBox 6.1.4-136177)
I have an SSD (Samsung SSD 860 EVO 4TB + luks + lvm + ext4)
with a virtual machine, without troubles, since months.
Now, I move the virtual machine on external USB
disk (Seagate M3 Portable 4TB + luks + BTRFS).
Run it, and after a few minutes of simple boot and Windows updating
(the guest system), I find this in dmesg:
[376827.145222] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O!
[376827.145225] File: /mnt/4TB/piastrelli/home/virtual/VirtualBox VMs/Zuccotti/Snapshots/{badf36e0-30a3-4fef-b723-4cdab32f2ef0}.vdi PID: 48667 Comm: kworker/1:0
[376827.145230] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O!
[376827.145231] File: /mnt/4TB/piastrelli/home/virtual/VirtualBox VMs/Zuccotti/Snapshots/{badf36e0-30a3-4fef-b723-4cdab32f2ef0}.vdi PID: 48667 Comm: kworker/1:0
[376827.145234] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O!
[376827.145234] File: /mnt/4TB/piastrelli/home/virtual/VirtualBox VMs/Zuccotti/Snapshots/{badf36e0-30a3-4fef-b723-4cdab32f2ef0}.vdi PID: 48667 Comm: kworker/1:0
[376827.145236] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O!
[376827.145237] File: /mnt/4TB/piastrelli/home/virtual/VirtualBox VMs/Zuccotti/Snapshots/{badf36e0-30a3-4fef-b723-4cdab32f2ef0}.vdi PID: 48667 Comm: kworker/1:0
[376827.145240] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O!
[376827.145241] File: /mnt/4TB/piastrelli/home/virtual/VirtualBox VMs/Zuccotti/Snapshots/{badf36e0-30a3-4fef-b723-4cdab32f2ef0}.vdi PID: 48667 Comm: kworker/1:0
I kindly ask your advice. At the moment the virtual seems to work
without problem.
Thanks a lot,
Gelma
