(original article)

Re: Converting RAID5 to RAID6 and other shape changing in md/raid

06 January 2010, 19:34 UTC

Option 1 is definitely better if you are happy with the extended down-time that it requires. It will very likely be faster as the RAID5 -> RAID6 conversion is very slow.

As you say, you will have a complete, valid copy of the data on the smaller drives which is good insurance.

So go with option 1.