A new hard-disk, 160GB has been put into place. With this - hopefully, all issues should go away. Note - it is possible that some files are missing - as some errors were notified during the copy process. However, taking a copy of the still running system has probably less missing files than a 28 hours old backup.
For those reading their mails on my system, if an old mail is missing - let me know. I can restore it from the old backups (50 Weeks rotation is configured)...