Hi folks
Only one fail on a restore and that was because the target HDD was faulty (actually the the sata card it was connected to was the culprit.)
Personally I wouldn't worry about the reliability of the backups -- however DO TEST a restore from time to time and it is sensible to have more than 1 backup -- external HDD media is quite cheap these days -- what would your time be worth re-ripping say 4,000 audio cd's - even if you could find the originals, recovering all your multi-media files, photos etc and other data. You'd also have to find all serial numbers of any products installed plus drivers / updates etc etc -- a long and time wasting process -- typical windows system can be backed up - especially if source and target on SSD's in around 10 mins - even with modest hardware.
Backing up multi-media plus other data will take longer but as that rarely changes you only need to do it once and then just update changes e.g new music etc.
Message to those using NAS servers -- don't forget to back these up as well from time to time - they do fail sometimes (not often but as these usually contain a decent amount of data then recovery can also be a real pain).
4TB passport USB3 external self powered pocket size drives make good backup media --these are cheap and easily stored off line.
@
cereberus
Most Linux distros (and hence could be OK for NAS) have a GUI front end for rsync which is an easy tool for Linux backups including just update files that have changed etc etc -- really simple. The graphical interface is called GRSYNC.
The NAS I'm currently have in daily use has 2 X 10 TB of data in RAID arrays so imaging the HDD´s isn´t actually a viable option. Sharing Windows directories to the NAS backs up my Windows (and any client connected as well) data files and the 2nd backup updates those files to external USB 3 Passport drives formatted XFS.
The GRSYNC job runs nightly as a "CRON" job -- i.e scheduled job. If any Host windows machine is down that day then the next time the job runs and that client is up then it backs up as normal so no data is missed.
For system I always image the windows HDD (it's on a dedicated SSD) with macrium.
Cheers
jimbo