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, {. }2 d% f! h* H+ R Y' y0 v特权模式下，第一步就不行了，然后ls -l /dev/mtd* 可以看到
# B- {: U: O$ f; G# jcrw------- 1 root root 90, 0 Jan 1 08:00 /dev/mtd0
' O$ [6 P5 I1 T# s/ ]/ |3 `' [3 bcrw------- 1 root root 90, 1 Jan 1 08:00 /dev/mtd0ro 5 y" _7 ^4 w+ {
crw------- 1 root root 90, 2 Jan 1 08:00 /dev/mtd1
$ j; o9 a$ {7 w* I i! }crw------- 1 root root 90, 3 Jan 1 08:00 /dev/mtd1ro
! [% E, v; t- N- q- t+ Ocrw------- 1 root root 90, 4 Jan 1 08:00 /dev/mtd2 6 G; |/ X) r' o# N# G1 O
crw------- 1 root root 90, 5 Jan 1 08:00 /dev/mtd2ro : c0 W {7 x" E
crw------- 1 root root 90, 6 Jan 1 08:00 /dev/mtd3
8 _$ d( i4 h5 h0 }" t5 b4 Ccrw------- 1 root root 90, 7 Jan 1 08:00 /dev/mtd3ro 5 |9 U( {; A- m+ y
brw------- 1 root root 31, 0 Jan 1 08:00 /dev/mtdblock0
4 p$ g5 R, K- K Obrw------- 1 root root 31, 1 Jan 1 08:00 /dev/mtdblock1
; [8 f# ]6 U+ `& H+ \* A; P' p; Z% Ibrw------- 1 root root 31, 2 Jan 1 08:00 /dev/mtdblock2
- Q& R) P( y$ w) b( Sbrw------- 1 root root 31, 3 Jan 1 08:00 /dev/mtdblock3 , j# h' i' m9 Y. ~4 H
但是执行有如下错误
$ k' {) N! u; M) k7 C9 p* g# nsh-4.3# dd if=fullcat.bin of=/dev/mtd0 ( ^. S, w( F( }- S2 V; u
dd: writing to '/dev/mtd0': No space left on device % M$ Q. h2 n5 D X+ t2 T
1601+0 records in 8 R! P+ J9 ^0 j) y6 a/ P* I. p
1600+0 records out
5 n% A: w% H0 C8 v% H819200 bytes (819 kB, 800 KiB) copied, 1.40157 s, 584 kB/s
' R& p: g! g! ]( V6 Dsh-4.3# dd if=fullcat.bin of=/dev/mtd0ro % F! M* W! T6 v
dd: failed to open '/dev/mtd0ro': Permission denied
2 E; a% ~, f, w7 i7 ]sh-4.3# chmod 777 /dev/mtd0ro , B" S# _% @5 O9 O+ _
sh-4.3# dd if=fullcat.bin of=/dev/mtd0ro
( O0 U2 O8 V N; d& @! mdd: failed to open '/dev/mtd0ro': Permission denied 3 K* W1 M6 \7 ^/ Z$ d: ` o4 Q$ o
sh-4.3# , a+ p8 | |- C9 F. w$ m: ^
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