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rated 0 times [ 0] [ 0] / answers: 1 / hits: 1782 / 3 Years ago, fri, september 17, 2021, 4:49:51

I have just broke my software RAID 5 Array (build using mdadm) set up by changing one of the HDD partition.

The exact command I used is:

sudo parted -s /dev/sdb mklabel msdos

on one of 4 HDDs in my array.

Is there a way how to fix this HDD and add it back to array without loosing any data?

I'm very new to linux, so now sure how to show you more info about my set up.

Mike

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answered 3 Years ago urvedcaly · Accepted Answer

How to add the 4th disk back to the raid? "From Mike's Question in previous comment"

Edit this for your needs:

mdadm --add /dev/md1 /dev/sdf1

mdadm --grow /dev/md1 --raid-devices=4

This then took several hours to reshape the array.

The filesystem the needs to be expanded to fill up the new space.

fsck.ext3 /dev/md1

resize2fs /dev/md1