7 Steps to Safely Replace a Drive in a Linux MD RAID Array

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 Whether you have a failed drive, or want to step up to a larger set of drives, or even just want to clone a mirrored system, here is the procedure I use. 
 
Before I configure an array, I like to make sure all drive bays are labelled with the corresponding drive's serial number, that makes this process much easier! I have a DYMO LetraTag LT-100H label maker that does the job…

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