Originally Posted by TontNZ
I have about 400GB of FLAC, excluding 300 classical CD's which are yet to be ripped. I use an external 3TB USB3 (3.5 inch) hard drive for permanent storage and playback. I rip to (and use for short term storage) an internal RAID 10 array (4 x 3TB) and also copy all FLAC and video to an external RAID 5 array (5 x 3TB) used purely for backup. I also copy all FLAC to a portable (2.5 inch) 2TB external hard drive. I also have 128GB in my iBasso DX50.
Slightly OT, but a salutary lesson. As mentioned above I was running RAID 10 (4 x 3TB). RAID 10 both distributes the data over two drives (for speed) and duplicates each drive (for redundancy). I also was backing up to an external 3TB disk. About the time of the original post I started noticing errors on the backup drive. So I decided to copy all of my backup data to the RAID 10 array and swap out the faulty backup disk. So I copied the backup data back to my RAID 10 array and ran test software on backup drive to confirm that it was in fact faulty, which it was. The disk diagnostics destroyed the backup data - but no problem - it was on the RAID 10 array.
At this point my RAID 10 array lost two disks - irrecoverable read errors. They catastrophically fail all self-tests and read diagnostics. No recoverable data.
I've lost 12 years of company data and personal data (except my music which was backed up elsewhere). Completely and utterly unrecoverable.
The two RAID 10 disks that failed were purchased new and less than two years old (about 20 months of use). They were purchased at slightly different times so that all disks would not be from the same batch. My system is high end and runs incredibly cool, so disk heating is never an issue.
Sometimes when you think you've got everything covered you couldn't be more wrong.
I'm now purchasing high-end enterprise specification hard-drives. Be warned if you're running consumer spec'ed hard drives, they will fail at some time and as you can read here - some much sooner than later.
Please learn from my hubris.