> OK. Could you please write 4K zeros to the device with dd and > then read them back out using od -x? Hope I did it right: dd if=/dev/zero of=/dev/mapper/devdmcrypt bs=4k count=1 1+0 records in 1+0 records out 4096 bytes (4.1 kB) copied, 0.0353821 seconds, 116 kB/s od -x /dev/mapper/devdmcrypt 0000000 0000 0000 0000 0000 0000 0000 0000 0000 * 15720240 ab28 c716 3349 75e2 9c3d 2bcd 01ca 5216 (...) cheers, Markus - To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html