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特权模式下，第一步就不行了，然后ls -l /dev/mtd* 可以看到
* c( N, g% V% V( rcrw------- 1 root root 90, 0 Jan 1 08:00 /dev/mtd0 + }3 m* o' Q; r: O
crw------- 1 root root 90, 1 Jan 1 08:00 /dev/mtd0ro & h @+ L; r' V, x4 D
crw------- 1 root root 90, 2 Jan 1 08:00 /dev/mtd1 & F J9 o4 x1 I8 i" S0 x
crw------- 1 root root 90, 3 Jan 1 08:00 /dev/mtd1ro
, e' u9 F* o! ^crw------- 1 root root 90, 4 Jan 1 08:00 /dev/mtd2
2 E8 V/ o' ^7 _5 d+ R" ^ ?' ]crw------- 1 root root 90, 5 Jan 1 08:00 /dev/mtd2ro 2 y) i; P0 y; n, b- v# y! e- K1 P$ c
crw------- 1 root root 90, 6 Jan 1 08:00 /dev/mtd3 - V( J9 C! m, ?( Z4 z4 ^% |/ w
crw------- 1 root root 90, 7 Jan 1 08:00 /dev/mtd3ro " p, |* C. g0 t* r6 ?! x n' |
brw------- 1 root root 31, 0 Jan 1 08:00 /dev/mtdblock0 " g0 [- |1 t& ?4 S9 o
brw------- 1 root root 31, 1 Jan 1 08:00 /dev/mtdblock1 6 A/ f6 P8 ?' \8 {+ H
brw------- 1 root root 31, 2 Jan 1 08:00 /dev/mtdblock2
, f8 z7 G- _* i M5 m! M2 f& o& G% z" \0 ebrw------- 1 root root 31, 3 Jan 1 08:00 /dev/mtdblock3
{6 S& ^# y! O$ _; K% x但是执行有如下错误5 |% k7 k# }2 e9 l G
sh-4.3# dd if=fullcat.bin of=/dev/mtd0
& K+ H4 k$ | M2 ?+ O( Kdd: writing to '/dev/mtd0': No space left on device $ |! L* U1 c6 c; F4 c6 h& l
1601+0 records in , I( c: b, V. F1 S. M4 d
1600+0 records out
" c2 f! I% ]$ c8 [% e' Z! c819200 bytes (819 kB, 800 KiB) copied, 1.40157 s, 584 kB/s
# R; u4 @# J! s* ]9 g; S. ksh-4.3# dd if=fullcat.bin of=/dev/mtd0ro 0 q) K2 N7 `: F$ p5 e) a
dd: failed to open '/dev/mtd0ro': Permission denied
) n% X% L8 y& S' |2 msh-4.3# chmod 777 /dev/mtd0ro
1 l- F ` }; gsh-4.3# dd if=fullcat.bin of=/dev/mtd0ro X7 ^) F1 m% X J5 H3 j5 C
dd: failed to open '/dev/mtd0ro': Permission denied
2 q6 @2 w# o/ Z! ], t* O& N3 i) ksh-4.3# 1 C. c p$ u; C- m0 l% r
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