Hi list! Sometimes I want to exchange a drive in an array even if it hasn't actually failed, e. g. - in preperation for a grow operation: exchange-resync-exchange-resync-...-grow - when removing old drives as part of regular maintenance - ... Currently one has to fail an active drive to trigger a resync to the replacement (assuming it was added as a spare beforehand) and thus suffer the loss of fault tolerance and performance until the sync is complete. Suggestion: allow adding drives as an explicit replacement for an active one. The active drive would then be copied to the new one in the background, effectively replacing the component device with a mirror. Bonus points if the resulting setup is a valid mode of operation and not just a temporary hack. I suppose one could see the feature as a special case of the reshaping that's all the rage now :) Thanks for listening, Christian -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
