Upgrading to larger hard drives on MyCloud Ex2 Ultra

[Cerberus]

@jbklyman

Raid 1 is a duplicate copy of drive, so if one drive fails, you still have a working copy to recover from. with JABOD if the drive goes you lose everything with no chance to recover. If a file goes in or gets damaged on a JABOD system then that file is corrupted.

It’s JBOD not JABOD, and I know how RAID 1 works.

@jbklyman

With an individual drives ability to do error detection & remap bad sectors elsewhere, it would be hard to scramble a file. RAID is made to detect drive faults and not corrupt the second copy, so unless the file going in is already bad, RAID 1 is not likely to introduce further corruption.

RAID 1 mirrors all file changes instantly, so any changes to a file will be instantly mirrored to the secondary drive. My point about the dangers of RAID 1 has nothing to do with being able to remap bad sectors or detect drive faults.

• File edited by a user... mirrored
• File deleted by a user... mirrored
• File corrupted by a program... mirrored
• File encrypted by ransomware... mirrored

In other words, if anything screws up a file, those changes are instantly mirrored to the secondary drive, and there’s no going back. Backups don’t have this problem.

@jbklyman

MyCloud is a resilient media but it is still a single source point of failure.

My Cloud and the word resilient should NEVER be used in the same sentence, and the misconceptions about RAID will never cease to amaze me.

The RAID Fallacy

RAID exists to provide high availability, at the expense of increased complexity, and reduced reliability. It’s primary purpose is to keep servers ONLINE, thus buying time to repair any problems that might arise. RAID is NOT backup, yet the RAID fallacy persists. RAID 1 is safe because it mirrors my files to a "backup" drive, right? WRONG! RAID 1 mirrors ALL changes to the secondary drive. If a file is corrupted or deleted on the primary drive, it’s also automatically corrupted or deleted on …