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I have a home media server that gave me a message today saying one of the drives is soon to fail (not happy, still under warranty, that's another issue)

I am running Mdadm raid 0 on a 3 drive system 4TB each.

I've got just enough space that I could remove the drive and still have some space left.

If I simply remove the drive from the array, will the data on it get moved to the other drives, or is just "lost"?

Since I have enough space on the remaining 2 drives, is it possible to "shrink" the array by 1 partition, and then remove it?

Ramhound
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JonYork
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2 Answers2

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RAID 0 will implode as soon as a single disk fails, as the data is spread across the disks, regardless of the size the the partition/volume in comparison to the array (a volume that's 1/10th the size of the array is still spread across disks). No data will be automatically moved anywhere. Make a backup of the volume to a secondary data device, blow away the array, remove the drive, recreate the array as wanted, restore data.

Ƭᴇcʜιᴇ007
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since its raid 0 it doesn't have any back up I recommend writing a back up to another drive before doing anything and change the raid to a raid 10 it does have redundancy so at that point you can remove a drive and put a new one in and it will re write the info to the new drive. You do need 4 drives for raid 10 but I think it might be the answer for you because it provides the bonus performance while giving you a mirrored setup... with this set up you should even be able to hotswap 1 drive or any 1 drive could fail any you would have no issues.

check this out it has a bit more info on RAID: https://www.prepressure.com/library/technology/raid

Just Curious
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