sikosis wrote:I just had 2 WD30EFRX fail within a week of each other, just out of warranty (3 years) and now I no access to my data. The second one failed when I put in a brand new one.
It's not uncommon for RAID disks (especially when bought at the same time and being used in the same RAID) to fail during a rebuild. Contrary to what some people think, WD Red and other cheap NAS disks doesn't offer fantastic longetivity. WD Red have a NAS compliant firmware at a budget price which is great but hardware quality is still at budget desktop disk level. it's the same with the similarly priced models from the competition.
If you want enterprise longetivity you need to look at enterprise disks or at least at the 5-year warranty NAS Pro disks (though WD Red Pro is hugely overpriced so I would recommend looking at Seagate Ironwolf Pro instead).
Hard disks are wear parts that need need to be replaced regularly. When the warranty period ends you should already have a replacement plan. If you're lucky and they give you some bonus time, then be happy for that but you can never count on it.
If you've now lost data I feel very sorry for that but you really should have have kept backups of any important data, as both Qnap and all experienced administrators constanty advice.
RAID have never ever been a replacement for backups. Without backups on a different system (preferably placed at another site), you will eventually lose data!
A non-RAID configuration (including RAID 0, which isn't really RAID) with a backup on a separate media protects your data far better than any RAID-volume without backup.
All data storage consists of both the primary storage and the backups. It's your money and your data, spend the storage budget wisely or pay with your data!