On Wed, Aug 04, 2010 at 11:13:17AM +0200, Dominik Brodowski wrote: > > show these problems? > > No, 2.6.31 to 2.6.34 show similar behaviour. Ok, so it's been around for a while. Can you test the write speed of each individual device layer by doing a large read from it, using: dd if=<device> of=/dev/null bs=8k iflag=direct where device starts with the /dev/sda* device, and goes up to the MD device, the dm-crypt device and the LV. And yes, it's safe to read from the device while it's otherwise mounted/used. -- 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
