lando_uk wrote:That thing is a consumer grade NAS, its not fit for business/enterprise workloads.
That's right. I can only add that most of the corrupted backups we see in support, we see on consumer grade NAS. This is why we so highly recommend using regular servers with a bunch of drives in them instead.
That said, simply shutting down NAS should not corrupt backups, even with a customer grade NAS. When ALL backups on the storage are corrupted, it usually indicates bad storage-level corruption caused by things like malfunctioning RAID controller, bad memory, firmware bugs etc.
@Phaze one of many differences between Veeam and Backup Exec is that our backups are not plain images. We calculate and store hash for every block, and compare the restored data to its hash value to be able to detect storage-level corruption (that is, when what was stored on the storage is different from what was read back) at restore time. Now, this metadata containing hashes is stored twice in the backup file for redundancy, and also to enable us to update metadata in transactional manner - specifically to make sure we always have a "good" metadata bank even if the storage experiences shutdown during the metadata update. So, having all instances of storage metadata corrupted indicates major issues with the storage.