In $TopDir/pc/host, I have some orphaned directories that don't appear in $TopDir/pc/host/backups.
For example: this host shows two extra directories, and XferLOGs for backup #5 and #6 that does not appear in the 'backups' file:
The odd thing is that the LOG suggests that Backups #5 and #6 should have been deleted:
...
2017-05-11 20:04:32 incr backup started for directory /
2017-05-11 20:08:38 incr backup 12 complete, 182376 files, 182376 bytes, 0 xferErrs (0 bad files, 0 bad shares, 0 other)
2017-05-11 20:08:38 Removing unfilled backup 3
2017-05-11 20:08:38 BackupPC_backupDelete: removing #3
2017-05-11 20:08:38 BackupPC_backupDelete: No prior backup for merge
2017-05-11 20:08:46 BackupPC_refCountUpdate: host isxxt004 got 0 errors (took 7 secs)
2017-05-11 20:08:46 Finished BackupPC_backupDelete, status = 0 (running time: 8 sec)
2017-05-12 20:03:29 incr backup started for directory /
2017-05-12 20:05:03 incr backup 13 complete, 182381 files, 182381 bytes, 0 xferErrs (0 bad files, 0 bad shares, 0 other)
2017-05-12 20:05:04 Removing unfilled backup 5
2017-05-12 20:05:04 BackupPC_backupDelete: removing #5
2017-05-12 20:05:04 BackupPC_backupDelete: No prior backup for merge
2017-05-12 20:05:08 BackupPC_refCountUpdate: host isxxt004 got 0 errors (took 4 secs)
2017-05-12 20:05:08 Finished BackupPC_backupDelete, status = 0 (running time: 4 sec)
2017-05-13 20:03:17 incr backup started for directory /
2017-05-13 20:05:20 incr backup 14 complete, 182388 files, 182388 bytes, 0 xferErrs (0 bad files, 0 bad shares, 0 other)
2017-05-13 20:05:20 Removing unfilled backup 6
2017-05-13 20:05:21 BackupPC_backupDelete: removing #6
2017-05-13 20:05:21 BackupPC_backupDelete: No prior backup for merge
2017-05-13 20:05:25 BackupPC_refCountUpdate: host isxxt004 got 0 errors (took 4 secs)
2017-05-13 20:05:25 Finished BackupPC_backupDelete, status = 0 (running time: 5 sec)
...
At this point, I'm not concerned about losing the incremental backup history, and just want to get the '$TopDir/pc' tree into a consistent state.