david@xxxxxxx put forth on 3/25/2010 11:56 PM:
>>> the next fun thing is figuring out what sort of stride, etc parameters I
>>> should have used for this filesystem.
>> mkfs.xfs should suss that out for you automatically based on talking
>> to md;
>> of course you'd want to configure md to line up well with the hardware
> in this case md thinks it's working with 10 12.8TB drives, I really
> doubt that it's going to do the right thing.
> I'm not exactly sure what the right thing is in this case. the hardware
> raid is useing 64K chunks across 16 drives (so 14 * 64K worth of data
> per stripe), but there are 10 of these stripes before you get back to
> hitting the same drive again.
It would be helpful if you told us the primary application(s) that will be
writing to this large multi-level RAID setup. Primarily large files or
small? Database? ??