Ich stimme übrigens zu, dass das ein seltsames "Update" ist. Wenn ich mein /dev/mtdblock4 auspacke, finde ich darin einen "RK29xxLoader....2.14.bin". In dem ladbaren Update steht was von 2.12:
$ ./rkunpack ../out
invalid file size (should be 289669124 bytes)manufacturer RK29SDK model ADM712HC
10 files
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00000800-00000fff package-file

ackage-file 540 bytes
00001000-000267ff bootloader:RK29xxLoader(L)_V2.14.bin 151854 bytes
00026800-00026fff parameter

arameter 611 bytes NAND offset 0x0
00027000-00032fff misc:Image/misc.img 49152 bytes NAND offset 0x2000
00033000-007befff boot:Image/boot.img 7913472 bytes NAND offset 0x8000
007bf000-010e2fff recovery:Image/recovery.img 9584640 bytes NAND offset 0x10000
010e3000-1143efff system:Image/system.img 271958016 bytes NAND offset 0x244000
----------------- backup:SELF(../out) 289669124 bytes NAND offset 0x18000
1143f000-1143f7ff update-script:update-script 933 bytes
1143f800-1143ffff recover-script:recover-script 266 bytes
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unpacked