Well, I tried 3 scenarios with the stride/stripe-width settings:

(1) None, mkfs.ext4 with defaults.

(2) Using the -E option to set the stride/stripe-width to match the disk array
     configuration.

(3) Using LVM with defaults.

There was no difference in writing to the disk.


     

On 11/06/2012 11:21 AM, Ken Teh wrote:
> I'm wondering if anyone has tried using stride and stripe-width options when
> creating an ext4 filesystem on a hardware RAID5 array.
>
> Does it improve the performance of the array?
>
> Should you create the filesystem directly on the partition?  What happens if
> you create it on a logical volume that is created on the physical partition?
>
> The LVM volume was created without options, ie, defaults.  I know LVM supports
> stride and stripes as well but I dont know how they map to a physical RAID
> device so I've never bothered with it.