xfs hardware RAID alignment over linear lvm

[Stewart Webb <stew@xxxxxxxxxxxxxxxxxx>]

Hi All,

I am trying to do the following:

3 x Hardware RAID Cards each with a raid 6 volume of 12 disks presented to the OS

all raid units have a "stripe size" of 512 KB

so given the info on the xfs.org wiki - I sould give each filesystem a sunit of 512 KB and a swidth of 10 (because RAID 6 has 2 parity disks)

all well and good

But - I would like to use Linear LVM to bring all 3 cards into 1 logical volume -

here is where my question crops up:

Does this effect how I need to align the filesystem?

Regards

--

Stewart Webb