On Mon, Jan 20, 2014 at 11:35:40PM -0800, Marc MERLIN wrote:
> Howdy,
>
> I'm setting up a new array with 5 4TB drives for which I'll use dmcrypt.
>
> Question #1:
> Is it better to dmcrypt the 5 drives and then make a raid5 on top, or the opposite
> (raid5 first, and then dmcrypt)
> I used:
> cryptsetup luksFormat --align-payload=8192 -s 256 -c aes-xts-plain64 /dev/sd[mnopq]1
I should have said that this is seemingly a stupid question since obviously
if you encrypt each drive separately, you're going through the encryption
layer 5 times during rebuilds instead of just once.
However in my case, I'm not CPU-bound, so that didn't seem to be an issue
and I was more curious to know if the dmcrypt and dmraid5 layers stacked the
same regardless of which one was on top and which one at the bottom.
Marc
--
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
.... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/
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