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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
0 r( Q7 Z0 K. h. J2 vcrw------- 1 root root 90, 0 Jan 1 08:00 /dev/mtd0 & m. i( t) m" {% E, e: F A1 a. b
crw------- 1 root root 90, 1 Jan 1 08:00 /dev/mtd0ro
6 X" C9 a' T; L8 r, Gcrw------- 1 root root 90, 2 Jan 1 08:00 /dev/mtd1
" |+ W) Q. a- B# ?( ncrw------- 1 root root 90, 3 Jan 1 08:00 /dev/mtd1ro
0 H& E; n3 B1 C: f' c) z& Wcrw------- 1 root root 90, 4 Jan 1 08:00 /dev/mtd2
' ~9 `3 \' m" B" Ocrw------- 1 root root 90, 5 Jan 1 08:00 /dev/mtd2ro ( u5 L, B' c0 P0 u% r$ j( i6 O8 ?" u
crw------- 1 root root 90, 6 Jan 1 08:00 /dev/mtd3
/ Y7 T# V$ c3 H( b; P Z7 k0 Dcrw------- 1 root root 90, 7 Jan 1 08:00 /dev/mtd3ro # P; d4 }9 Q: y
brw------- 1 root root 31, 0 Jan 1 08:00 /dev/mtdblock0 / p4 A6 I2 x" c+ e' S8 Z3 I; l& K
brw------- 1 root root 31, 1 Jan 1 08:00 /dev/mtdblock1 * d& P, p9 x. d! w
brw------- 1 root root 31, 2 Jan 1 08:00 /dev/mtdblock2
9 I; Y# ?0 @& vbrw------- 1 root root 31, 3 Jan 1 08:00 /dev/mtdblock3 ' B9 }9 U7 z; @5 R' W$ b8 V% W
但是执行有如下错误
# s# s* j: ~/ X4 Z6 a2 _9 Bsh-4.3# dd if=fullcat.bin of=/dev/mtd0
( B' m; E. o; S- U, S C9 kdd: writing to '/dev/mtd0': No space left on device
5 {6 Q8 d# {' C# Q0 K' ^. w# ~' r1601+0 records in / l% O, O/ Q& d! H
1600+0 records out \/ e3 l7 `! ]- O+ s6 J$ |
819200 bytes (819 kB, 800 KiB) copied, 1.40157 s, 584 kB/s ' c# y/ H7 Z. |) l# g4 ?, f) U
sh-4.3# dd if=fullcat.bin of=/dev/mtd0ro 0 s# g8 V" R- U4 x0 Y5 b2 w
dd: failed to open '/dev/mtd0ro': Permission denied
0 V1 B! _' J. J/ W0 Ssh-4.3# chmod 777 /dev/mtd0ro % Q! D& n( s0 J8 x
sh-4.3# dd if=fullcat.bin of=/dev/mtd0ro
) q, Q# n b7 T: r- `& l# Hdd: failed to open '/dev/mtd0ro': Permission denied 2 ~+ N0 b* u2 T" @4 U; z, x1 o
sh-4.3#
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