为什么会有坏块

yaffs: auto selecting yaffs2
block 2 is bad
block 3 is bad
block 4 is bad
block 5 is bad
block 6 is bad
block 7 is bad
block 8 is bad
block 9 is bad
block 10 is bad
block 11 is bad
block 12 is bad
block 13 is bad
block 14 is bad
block 15 is bad
block 16 is bad
block 17 is bad
block 18 is bad
block 19 is bad
block 20 is bad
block 21 is bad
block 22 is bad
block 23 is bad
block 24 is bad
block 25 is bad
block 26 is bad
block 27 is bad
block 28 is bad
block 29 is bad
block 30 is bad
block 31 is bad
block 32 is bad
block 33 is bad
block 34 is bad
block 35 is bad
block 36 is bad
block 37 is bad
block 38 is bad
block 39 is bad
block 40 is bad
block 41 is bad
block 42 is bad
block 43 is bad
block 44 is bad
block 45 is bad
block 46 is bad
block 47 is bad
block 48 is bad
block 49 is bad
block 50 is bad
block 51 is bad
block 52 is bad
block 53 is bad
block 54 is bad
block 55 is bad
block 56 is bad
block 57 is bad
block 58 is bad
block 59 is bad
block 60 is bad
block 61 is bad
block 62 is bad
block 63 is bad
block 64 is bad
block 65 is bad
block 66 is bad
block 67 is bad
block 68 is bad
block 69 is bad
block 70 is bad
block 71 is bad
block 72 is bad
block 73 is bad
block 74 is bad
block 75 is bad
block 76 is bad
block 77 is bad
block 78 is bad
block 79 is bad
block 80 is bad
block 81 is bad
block 82 is bad
block 83 is bad
block 84 is bad
block 85 is bad
block 86 is bad
block 87 is bad
block 88 is bad
block 89 is bad
block 90 is bad
block 91 is bad
block 92 is bad
block 93 is bad
block 94 is bad
block 95 is bad
block 96 is bad
block 97 is bad
block 98 is bad
block 99 is bad
block 100 is bad
block 101 is bad
block 102 is bad
block 103 is bad
block 104 is bad
block 105 is bad
block 106 is bad
block 107 is bad
block 108 is bad
block 109 is bad
block 110 is bad
block 111 is bad
block 112 is bad
block 113 is bad
block 114 is bad
block 115 is bad
block 116 is bad
block 117 is bad
block 118 is bad
block 119 is bad
block 120 is bad
block 121 is bad
block 122 is bad
block 123 is bad
block 124 is bad
block 125 is bad
block 126 is bad
block 127 is bad
block 128 is bad
block 129 is bad
block 130 is bad
block 131 is bad
block 132 is bad
block 133 is bad

这是为什么那？在启动NAND上的YAFFS2文件系统、内核时会检测出好多坏块，怎么解决？

NAND格式化一次

建议你使用uboot的命令9-》命令1-》y-》回车，彻底格式化Nand Flash后，重新烧写镜像，可能是系统误判，出现的假坏块。

还有一种可能你烧写错了yaffs镜像。

查看u-boot的命令，用命令重新擦除一下。。。