raid1 on 628x

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rrmen1955 wrote:
I have some very precious an valuable data, I need to store. Raid 1 on 8x10tb harddrives should yield me approx 40tb completely redundant. The same data written on 2 disks. however, when i configure for raid1, it changes to raid6. I cant figure out how to make it stay raid1

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I think you are confused on your RAID modes.

If you truly want RAID1, then you need to create 4 volumes, one for each pair of drives.  Each volume is 10 TB, and has two drives that are mirrored.  So 40 TB of total space.  But you need to manually create shares on each volume and balance the space.

But from what you say, it sounds like you actually want RAID10.  This is a hybrid RAID mode  (1+0) that is described here: https://en.wikipedia.org/wiki/Nested_RAID_levels#RAID_10_(RAID_1+0)  It would give you a 40 TB volume, comprised of mirrored pairs.

RAID6 would protect against any combination of 2 disk failures, but always fails with 3 or more disk failures.  RAID10 fails with some combinations of two disk failures, but will succeed with some combinations of 3 or more drive failures.

Please read through the wiki article, and get back to us on the raid mode you want.

FWIW, RAID in any form isn't enough to keep your data safe.  It is helpful, but you do need a backup of your data on other devices in order to keep your data safe.