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Answer by S.Haran for How to tell mdadm to use a partition as/instead of a...

I like to fill used drives with zeroes before re-purposing for mdadm use. It makes the drive factory fresh and avoids these kinds of problems. This will fill /dev/sda with zeroes...dd if=/dev/zero...

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Answer by jornane for How to tell mdadm to use a partition as/instead of a...

First of all, I don't think there's anything wrong with using a complete drive for mdadm. In other words, your setup works now, you won't have any advantage from fiddling with it any further. From the...

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How to tell mdadm to use a partition as/instead of a block-device?

I have four 500GB disks which were set up as a Linux Software-RAID 5 volume during the Debian install (next to the system drive which is a SSD). One of the drives (sda) went bad and now I am trying to...

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