BradIJM

Okay got it, so this is my plan, correct me if it’s wrong Restore the array using another 10tb drive to recover data delete the array and restart it with my new 8TB drives mount the old 10tb drives and transfer the data over to the new drives sound good?

I just had a thought about this actually, considering one of my 2 data disks is dead (completely undetectable), how do I copy the data over from that drive? Will I be able to copy it from the parity drive?

This seems sensible, I have only bought 2 new 8tb disks so far, so I’ll rebuild the old array as Frank1940 suggests and then start a new array and import them outside the array. Quick query for you, if I start a new array with my 2 8tb disks and use a working 10tb disk as parity, can the parity disk be replaced with a smaller drive, or will I run into the same issue as the data drives? Thanks!

I haven’t yet no, but I think this may be a good shout, I think I have a spare 10tb around somewhere that I can use to rebuild, And then use trurl’s suggestion and start a new array.

So long story short, I'm new to UNRaid, and being the silly person I was, I started off by using drives that were too big for what I really needed. I had 3 x 10TB drives with 1 as parity on my system, but one of my data drives has now failed (they were refurbished drives with a great number of power on hours). I now what to move to 8TB drives as they are cheaper to buy new than 10tb and I don't need all the storage. Is there any way I can migrate to these new smaller drives? I can't replace the original disk as it says I can't use a smaller drive than before. The drives only held about 4-6TB of data on them, so if I can theoretically shrink the other drives to 8TB would be great to make the swap outs easier in the event of drive failures in the future. Sorry if this doesn't make make sense, I'm trying to wrap my head around all of this still and now I'm trying to sort this ASAP as I'm running only on my parity and 1 data drive. For context, the data is not critical, and could theoretically be replaced if needed, however the less data I have to replace the better. Thanks in advance!