Comment 249 for bug 1470250

a1dd8c87 failed after 70(!) hours (VSS backups started to fail after 17 hours or so, but the file system was remounted read-only after 70 hours total)

Another observation, something which h I also noticed in previous "bad" runs:
Also almost instantly after starting backups, there were I/O errors on "/dev/sda sector 0" logged, with no obvious/immediate consequential failures, but the first I/O error on a non-zero sector caused a fs remount. Those errors were not in the good runs (or at least they weren't logged :P )

started run on d215f91-reverted