Comment 92 for bug 1470250

First backup failed immediately. We are noticing two more things.

First, the failed mount of today fails more often than other mounts. It is not the mount of the OS, but a second added disk (mounted in /dev/sdb1). I have attached the output for /etc/mtab and /etc/fstab of the specific machine that failed. Maybe it helps.

Secondly, backups always switch to read-only at almost the same time: near the end of the backup. I cannot say exactly when, but our backups usually take 4 hours. And failures are always (approx) within the last half hour.