Update -- it took about 30 hours to do the regression, started doing the backup, and then quickly crashed with another "No space left on device" exception. In kern.log I found these messages:
Sep 11 21:53:47 scruffy kernel: [294433.260536] EXT4-fs warning (device sde1): ext4_dx_add_entry:2190: Directory (ino: 30017692) index full, reach max htree level :2 Sep 11 21:53:47 scruffy kernel: [294433.260540] EXT4-fs warning (device sde1): ext4_dx_add_entry:2194: Large directory feature is not enabled on this filesystem It got the error while trying to write a file in ~/.cache/chromium/Default/Cache. Turns out that after running rdiff-backup for years I'd accumulated over 6 million files in /backup/scruffy/rdiff-backup-data/increments/home/waltman/.cache/chromium/Default/Cache It's a bit fuzzy how many files you can add to an ext4 directory, but it looks like I hit the limit. I added ~/.cache/chromium to my exclude list and restarted the backup. It looks a lot happier now. Walt _______________________________________________ rdiff-backup-users mailing list at rdiff-backup-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/rdiff-backup-users Wiki URL: http://rdiff-backup.solutionsfirst.com.au/index.php/RdiffBackupWiki