On Wed, 3 Apr 2013, victor yeo wrote: > > the parameter is file=/dev/mmcblk0p1 Perhaps you have already realized this... mmcblk0p1 is the first partition of the mmcblk0 device. Block 0 of the partition is the boot sector, not the MBR. The MBR is block 0 of the mmcblk0 device. So perhaps you really meant to use: file=/dev/mmcblk0 > I see a problem here. The first 32 bytes of the boot sector is > correct. The rest of the bytes are 00000000, which is wrong. See the > usbmon trace below. > > f59e13c0 2704842730 S Bo:2:007:1 -115 31 = 55534243 21000000 00800000 > 80000a28 00000020 00000040 00000000 000000 > f59e13c0 2704842836 C Bo:2:007:1 0 31 > > f319db40 2704842846 S Bi:2:007:1 -115 4096 < > f59e16c0 2704842848 S Bi:2:007:1 -115 4096 < > f59e14c0 2704842850 S Bi:2:007:1 -115 4096 < > f59e1240 2704842851 S Bi:2:007:1 -115 4096 < > f59e15c0 2704842852 S Bi:2:007:1 -115 4096 < > f59e1340 2704842853 S Bi:2:007:1 -115 4096 < > f59e12c0 2704842854 S Bi:2:007:1 -115 4096 < > f59e1540 2704842855 S Bi:2:007:1 -115 4096 < > f319db40 2705432226 C Bi:2:007:1 0 4096 = e52d424f 4f542020 42494e20 > 1886fc80 7c417c41 0000838a 7b410300 94b80200 > f59e16c0 2705432230 C Bi:2:007:1 0 4096 = 00000000 00000000 00000000 > 00000000 00000000 00000000 00000000 00000000 > f59e14c0 2705432231 C Bi:2:007:1 0 4096 = 00000000 00000000 00000000 > 00000000 00000000 00000000 00000000 00000000 > f59e1240 2705432231 C Bi:2:007:1 0 4096 = 00000000 00000000 00000000 > 00000000 00000000 00000000 00000000 00000000 > f59e15c0 2705432232 C Bi:2:007:1 0 4096 = 00000000 00000000 00000000 > 00000000 00000000 00000000 00000000 00000000 > f59e1340 2705432233 C Bi:2:007:1 0 4096 = 00000000 00000000 00000000 > 00000000 00000000 00000000 00000000 00000000 > f59e12c0 2705432234 C Bi:2:007:1 0 4096 = 00000000 00000000 00000000 > 00000000 00000000 00000000 00000000 00000000 > f59e1540 2705432234 C Bi:2:007:1 0 4096 = 00000000 00000000 00000000 > 00000000 00000000 00000000 00000000 00000000 > f59e13c0 2705432244 S Bi:2:007:1 -115 13 < > f59e13c0 2705438346 C Bi:2:007:1 0 13 = 55534253 21000000 00000000 00 Are you certain this is wrong? All those 0's could be unoccupied entries in a FAT. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
