On Monday May 22, Dexter.Filmore@xxxxxx wrote: > How will the raid5 resize in 2.6.17 be different from raidreconf? It is done (mostly) in the kernel while the array is active, rather than completely in user-space while the array is off-line. > Will it be less risky to grow an array that way? It should be. In particular it will survive an unexpected reboot (as long as you don't lose and drives at the same time) which I don't think raidreconf would. Testing results so far are quite positive. > Will it be possible to migrate raid5 to raid6? > Eventually, but no time frame yet. > (And while talking of that: can I add for example two disks and grow *and* > migrate to raid6 in one sweep or will I have to go raid6 and then add more > disks?) Adding two disks would be the preferred way to do it. Add only one disk and going to raid6 is problematic because the reshape process will be over-writing live data the whole time, making crash protection quite expensive. By contrast, when you are expanding the size of the array, after the first few stripes you are writing to an area of the drives where there is no live data. NeilBrown - 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
