Re: Second of 3 drives in RAID5 missing

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On 07/05/2023 17:47, Alex Elder wrote:
I think I'm on my way back now.  Thank you very much.    -Alex

root@meat:/home/elder# cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md127 : active raid5 sdc1[4] sdb1[0] sdd1[3]
      15627786240 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/2] [U_U]       [>....................]  recovery =  1.2% (96275752/7813893120) finish=639.3min speed=201178K/sec
       bitmap: 0/59 pages [0KB], 65536KB chunk

Looking good!

Just one last bit of advice - if you can, get another drive. Okay, you may not have a bay, or a sata port, or the cash ...

Add it to the array same as before. That'll give you a 3-drive raid plus spare. If another drive fails, it will then just start rebuilding straight away.

You'll get various people saying "if you've got 4 drives, just go raid-6". I'm not going to advise either way, other than to say "don't do it just now". If you read the list archive you'll see a couple of arrays have got wedged upgrading - udevd quite literally threw a monkey wrench into the works. Looks like an easy fix, but better not to risk it - just wait until the problem is fixed :-)

Nice drives btw, I've got a 3-drive raid-5 plus spare setup - 3TB Barracuda (DON'T use those!), two by 4TB Ironwolf, and an 8TB N300.

Cheers,
Wol



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