root@olinuxino-a20lime2:~# cat /proc/mtd
dev:    size   erasesize  name
mtd0: 00200000 00200000 "boot0"
mtd1: 00200000 00200000 "boot0-rescue"
mtd2: 00200000 00200000 "uboot"
mtd3: 00200000 00200000 "uboot-rescue"
mtd4: ff800000 00200000 "main"
root@olinuxino-a20lime2:~# flash_erase /dev/mtd0 0 0
Erasing 2048 Kibyte @ 0 -- 100 % complete
root@olinuxino-a20lime2:~# flash_erase /dev/mtd1 0 0
Erasing 2048 Kibyte @ 0 -- 100 % complete
root@olinuxino-a20lime2:~# flash_erase /dev/mtd2 0 0
Erasing 2048 Kibyte @ 0 -- 100 % complete
root@olinuxino-a20lime2:~# flash_erase /dev/mtd3 0 0
Erasing 2048 Kibyte @ 0 -- 100 % complete
root@olinuxino-a20lime2:~# flash_erase /dev/mtd4 0 0
Erasing 2048 Kibyte @ 1600000 --  0 % complete flash_erase: Skipping bad block at 01800000
flash_erase: Skipping bad block at 01a00000
Erasing 2048 Kibyte @ 2600000 --  0 % complete flash_erase: Skipping bad block at 02800000
flash_erase: Skipping bad block at 02a00000
Erasing 2048 Kibyte @ 6600000 --  2 % complete flash_erase: Skipping bad block at 06800000
flash_erase: Skipping bad block at 06a00000
Erasing 2048 Kibyte @ 6e00000 --  2 % complete flash_erase: Skipping bad block at 07000000
flash_erase: Skipping bad block at 07200000
flash_erase: Skipping bad block at 07400000
flash_erase: Skipping bad block at 07600000
flash_erase: Skipping bad block at 07800000
flash_erase: Skipping bad block at 07a00000
Erasing 2048 Kibyte @ 8200000 --  3 % complete flash_erase: Skipping bad block at 08400000
flash_erase: Skipping bad block at 08600000
Erasing 2048 Kibyte @ d200000 --  5 % complete flash_erase: Skipping bad block at 0d400000
flash_erase: Skipping bad block at 0d600000
Erasing 2048 Kibyte @ da00000 --  5 % complete flash_erase: Skipping bad block at 0dc00000
flash_erase: Skipping bad block at 0de00000
Erasing 2048 Kibyte @ f600000 --  6 % complete flash_erase: Skipping bad block at 0f800000
flash_erase: Skipping bad block at 0fa00000
Erasing 2048 Kibyte @ 10200000 --  6 % complete flash_erase: Skipping bad block at 10400000
flash_erase: Skipping bad block at 10600000
flash_erase: Skipping bad block at 10800000
flash_erase: Skipping bad block at 10a00000
Erasing 2048 Kibyte @ 10e00000 --  6 % complete flash_erase: Skipping bad block at 11000000
flash_erase: Skipping bad block at 11200000
Erasing 2048 Kibyte @ 11a00000 --  6 % complete flash_erase: Skipping bad block at 11c00000
flash_erase: Skipping bad block at 11e00000
Erasing 2048 Kibyte @ 13600000 --  7 % complete flash_erase: Skipping bad block at 13800000
flash_erase: Skipping bad block at 13a00000
flash_erase: Skipping bad block at 13c00000
flash_erase: Skipping bad block at 13e00000
flash_erase: Skipping bad block at 14000000
flash_erase: Skipping bad block at 14200000
flash_erase: Skipping bad block at 14400000
flash_erase: Skipping bad block at 14600000
flash_erase: Skipping bad block at 14800000
flash_erase: Skipping bad block at 14a00000
Erasing 2048 Kibyte @ 14e00000 --  8 % complete flash_erase: Skipping bad block at 15000000
flash_erase: Skipping bad block at 15200000
flash_erase: Skipping bad block at 15400000
flash_erase: Skipping bad block at 15600000
Erasing 2048 Kibyte @ 15a00000 --  8 % complete flash_erase: Skipping bad block at 15c00000
flash_erase: Skipping bad block at 15e00000
flash_erase: Skipping bad block at 16000000
flash_erase: Skipping bad block at 16200000
Erasing 2048 Kibyte @ 16a00000 --  8 % complete flash_erase: Skipping bad block at 16c00000
flash_erase: Skipping bad block at 16e00000
Erasing 2048 Kibyte @ 2f200000 -- 18 % complete flash_erase: Skipping bad block at 2f400000
Erasing 2048 Kibyte @ 33a00000 -- 20 % complete flash_erase: Skipping bad block at 33c00000
flash_erase: Skipping bad block at 33e00000
flash_erase: Skipping bad block at 34000000
flash_erase: Skipping bad block at 34200000
flash_erase: Skipping bad block at 34400000
flash_erase: Skipping bad block at 34600000
Erasing 2048 Kibyte @ 36200000 -- 21 % complete flash_erase: Skipping bad block at 36400000
flash_erase: Skipping bad block at 36600000
Erasing 2048 Kibyte @ 39200000 -- 22 % complete flash_erase: Skipping bad block at 39400000
flash_erase: Skipping bad block at 39600000
flash_erase: Skipping bad block at 39800000
flash_erase: Skipping bad block at 39a00000
flash_erase: Skipping bad block at 39c00000
flash_erase: Skipping bad block at 39e00000
Erasing 2048 Kibyte @ 3a600000 -- 22 % complete flash_erase: Skipping bad block at 3a800000
flash_erase: Skipping bad block at 3aa00000
flash_erase: Skipping bad block at 3ac00000
flash_erase: Skipping bad block at 3ae00000
flash_erase: Skipping bad block at 3b000000
flash_erase: Skipping bad block at 3b200000
Erasing 2048 Kibyte @ 3ba00000 -- 23 % complete flash_erase: Skipping bad block at 3bc00000
flash_erase: Skipping bad block at 3be00000
Erasing 2048 Kibyte @ 3ca00000 -- 23 % complete flash_erase: Skipping bad block at 3cc00000
flash_erase: Skipping bad block at 3ce00000
Erasing 2048 Kibyte @ 4f200000 -- 30 % complete flash_erase: Skipping bad block at 4f400000
flash_erase: Skipping bad block at 4f600000
Erasing 2048 Kibyte @ 78a00000 -- 47 % complete flash_erase: Skipping bad block at 78c00000
flash_erase: Skipping bad block at 78e00000
Erasing 2048 Kibyte @ d2200000 -- 82 % complete flash_erase: Skipping bad block at d2400000
flash_erase: Skipping bad block at d2600000
Erasing 2048 Kibyte @ d2e00000 -- 82 % complete flash_erase: Skipping bad block at d3000000
flash_erase: Skipping bad block at d3200000
Erasing 2048 Kibyte @ d3600000 -- 82 % complete flash_erase: Skipping bad block at d3800000
flash_erase: Skipping bad block at d3a00000
Erasing 2048 Kibyte @ d3e00000 -- 82 % complete flash_erase: Skipping bad block at d4000000
flash_erase: Skipping bad block at d4200000
Erasing 2048 Kibyte @ d4e00000 -- 83 % complete flash_erase: Skipping bad block at d5000000
flash_erase: Skipping bad block at d5200000
Erasing 2048 Kibyte @ d6600000 -- 83 % complete flash_erase: Skipping bad block at d6800000
flash_erase: Skipping bad block at d6a00000
Erasing 2048 Kibyte @ d8e00000 -- 84 % complete flash_erase: Skipping bad block at d9000000
flash_erase: Skipping bad block at d9200000
Erasing 2048 Kibyte @ d9600000 -- 85 % complete flash_erase: Skipping bad block at d9800000
flash_erase: Skipping bad block at d9a00000
Erasing 2048 Kibyte @ d9e00000 -- 85 % complete flash_erase: Skipping bad block at da000000
flash_erase: Skipping bad block at da200000
Erasing 2048 Kibyte @ db200000 -- 85 % complete flash_erase: Skipping bad block at db400000
flash_erase: Skipping bad block at db600000
flash_erase: Skipping bad block at db800000
flash_erase: Skipping bad block at dba00000
flash_erase: Skipping bad block at dbc00000
flash_erase: Skipping bad block at dbe00000
flash_erase: Skipping bad block at dc000000
flash_erase: Skipping bad block at dc200000
flash_erase: Skipping bad block at dc400000
flash_erase: Skipping bad block at dc600000
flash_erase: Skipping bad block at dc800000
flash_erase: Skipping bad block at dca00000
flash_erase: Skipping bad block at dcc00000
flash_erase: Skipping bad block at dce00000
flash_erase: Skipping bad block at dd000000
flash_erase: Skipping bad block at dd200000
Erasing 2048 Kibyte @ dda00000 -- 86 % complete flash_erase: Skipping bad block at ddc00000
flash_erase: Skipping bad block at dde00000
flash_erase: Skipping bad block at de000000
flash_erase: Skipping bad block at de200000
flash_erase: Skipping bad block at de400000
flash_erase: Skipping bad block at de600000
flash_erase: Skipping bad block at de800000
flash_erase: Skipping bad block at dea00000
flash_erase: Skipping bad block at dec00000
flash_erase: Skipping bad block at dee00000
flash_erase: Skipping bad block at df000000
flash_erase: Skipping bad block at df200000
flash_erase: Skipping bad block at df400000
flash_erase: Skipping bad block at df600000
flash_erase: Skipping bad block at df800000
flash_erase: Skipping bad block at dfa00000
flash_erase: Skipping bad block at dfc00000
flash_erase: Skipping bad block at dfe00000
flash_erase: Skipping bad block at e0000000
flash_erase: Skipping bad block at e0200000
flash_erase: Skipping bad block at e0400000
flash_erase: Skipping bad block at e0600000
flash_erase: Skipping bad block at e0800000
flash_erase: Skipping bad block at e0a00000
flash_erase: Skipping bad block at e0c00000
flash_erase: Skipping bad block at e0e00000
flash_erase: Skipping bad block at e1000000
flash_erase: Skipping bad block at e1200000
flash_erase: Skipping bad block at e1400000
flash_erase: Skipping bad block at e1600000
flash_erase: Skipping bad block at e1800000
flash_erase: Skipping bad block at e1a00000
flash_erase: Skipping bad block at e1c00000
flash_erase: Skipping bad block at e1e00000
flash_erase: Skipping bad block at e2000000
flash_erase: Skipping bad block at e2200000
flash_erase: Skipping bad block at e2400000
flash_erase: Skipping bad block at e2600000
flash_erase: Skipping bad block at e2800000
flash_erase: Skipping bad block at e2a00000
flash_erase: Skipping bad block at e2c00000
flash_erase: Skipping bad block at e2e00000
flash_erase: Skipping bad block at e3000000
flash_erase: Skipping bad block at e3200000
flash_erase: Skipping bad block at e3400000
flash_erase: Skipping bad block at e3600000
flash_erase: Skipping bad block at e3800000
flash_erase: Skipping bad block at e3a00000
flash_erase: Skipping bad block at e3c00000
flash_erase: Skipping bad block at e3e00000
flash_erase: Skipping bad block at e4000000
flash_erase: Skipping bad block at e4200000
flash_erase: Skipping bad block at e4400000
flash_erase: Skipping bad block at e4600000
flash_erase: Skipping bad block at e4800000
flash_erase: Skipping bad block at e4a00000
flash_erase: Skipping bad block at e4c00000
flash_erase: Skipping bad block at e4e00000
flash_erase: Skipping bad block at e5000000
flash_erase: Skipping bad block at e5200000
flash_erase: Skipping bad block at e5400000
flash_erase: Skipping bad block at e5600000
flash_erase: Skipping bad block at e5800000
flash_erase: Skipping bad block at e5a00000
flash_erase: Skipping bad block at e5c00000
flash_erase: Skipping bad block at e5e00000
flash_erase: Skipping bad block at e6000000
flash_erase: Skipping bad block at e6200000
flash_erase: Skipping bad block at e6400000
flash_erase: Skipping bad block at e6600000
flash_erase: Skipping bad block at e6800000
flash_erase: Skipping bad block at e6a00000
flash_erase: Skipping bad block at e6c00000
flash_erase: Skipping bad block at e6e00000
flash_erase: Skipping bad block at e7000000
flash_erase: Skipping bad block at e7200000
flash_erase: Skipping bad block at e7400000
flash_erase: Skipping bad block at e7600000
flash_erase: Skipping bad block at e7800000
flash_erase: Skipping bad block at e7a00000
flash_erase: Skipping bad block at e7c00000
flash_erase: Skipping bad block at e7e00000
flash_erase: Skipping bad block at e8000000
flash_erase: Skipping bad block at e8200000
flash_erase: Skipping bad block at e8400000
flash_erase: Skipping bad block at e8600000
flash_erase: Skipping bad block at e8800000
flash_erase: Skipping bad block at e8a00000
flash_erase: Skipping bad block at e8c00000
flash_erase: Skipping bad block at e8e00000
flash_erase: Skipping bad block at e9000000
flash_erase: Skipping bad block at e9200000
flash_erase: Skipping bad block at e9400000
flash_erase: Skipping bad block at e9600000
flash_erase: Skipping bad block at e9800000
flash_erase: Skipping bad block at e9a00000
flash_erase: Skipping bad block at e9c00000
flash_erase: Skipping bad block at e9e00000
flash_erase: Skipping bad block at ea000000
flash_erase: Skipping bad block at ea200000
flash_erase: Skipping bad block at ea400000
flash_erase: Skipping bad block at ea600000
flash_erase: Skipping bad block at ea800000
flash_erase: Skipping bad block at eaa00000
flash_erase: Skipping bad block at eac00000
flash_erase: Skipping bad block at eae00000
flash_erase: Skipping bad block at eb000000
flash_erase: Skipping bad block at eb200000
flash_erase: Skipping bad block at eb400000
flash_erase: Skipping bad block at eb600000
flash_erase: Skipping bad block at eb800000
flash_erase: Skipping bad block at eba00000
flash_erase: Skipping bad block at ebc00000
flash_erase: Skipping bad block at ebe00000
flash_erase: Skipping bad block at ec000000
flash_erase: Skipping bad block at ec200000
flash_erase: Skipping bad block at ec400000
flash_erase: Skipping bad block at ec600000
flash_erase: Skipping bad block at ec800000
flash_erase: Skipping bad block at eca00000
flash_erase: Skipping bad block at ecc00000
flash_erase: Skipping bad block at ece00000
flash_erase: Skipping bad block at ed000000
flash_erase: Skipping bad block at ed200000
flash_erase: Skipping bad block at ed400000
flash_erase: Skipping bad block at ed600000
Erasing 2048 Kibyte @ eda00000 -- 93 % complete flash_erase: Skipping bad block at edc00000
flash_erase: Skipping bad block at ede00000
flash_erase: Skipping bad block at ee000000
flash_erase: Skipping bad block at ee200000
flash_erase: Skipping bad block at ee400000
flash_erase: Skipping bad block at ee600000
flash_erase: Skipping bad block at ee800000
flash_erase: Skipping bad block at eea00000
flash_erase: Skipping bad block at eec00000
flash_erase: Skipping bad block at eee00000
flash_erase: Skipping bad block at ef000000
flash_erase: Skipping bad block at ef200000
flash_erase: Skipping bad block at ef400000
flash_erase: Skipping bad block at ef600000
flash_erase: Skipping bad block at ef800000
flash_erase: Skipping bad block at efa00000
flash_erase: Skipping bad block at efc00000
flash_erase: Skipping bad block at efe00000
flash_erase: Skipping bad block at f0000000
flash_erase: Skipping bad block at f0200000
flash_erase: Skipping bad block at f0400000
flash_erase: Skipping bad block at f0600000
flash_erase: Skipping bad block at f0800000
flash_erase: Skipping bad block at f0a00000
flash_erase: Skipping bad block at f0c00000
flash_erase: Skipping bad block at f0e00000
flash_erase: Skipping bad block at f1000000
flash_erase: Skipping bad block at f1200000
flash_erase: Skipping bad block at f1400000
flash_erase: Skipping bad block at f1600000
flash_erase: Skipping bad block at f1800000
flash_erase: Skipping bad block at f1a00000
flash_erase: Skipping bad block at f1c00000
flash_erase: Skipping bad block at f1e00000
flash_erase: Skipping bad block at f2000000
flash_erase: Skipping bad block at f2200000
flash_erase: Skipping bad block at f2400000
flash_erase: Skipping bad block at f2600000
flash_erase: Skipping bad block at f2800000
flash_erase: Skipping bad block at f2a00000
flash_erase: Skipping bad block at f2c00000
flash_erase: Skipping bad block at f2e00000
flash_erase: Skipping bad block at f3000000
flash_erase: Skipping bad block at f3200000
flash_erase: Skipping bad block at f3400000
flash_erase: Skipping bad block at f3600000
flash_erase: Skipping bad block at f3800000
flash_erase: Skipping bad block at f3a00000
flash_erase: Skipping bad block at f3c00000
flash_erase: Skipping bad block at f3e00000
flash_erase: Skipping bad block at f4000000
flash_erase: Skipping bad block at f4200000
flash_erase: Skipping bad block at f4400000
flash_erase: Skipping bad block at f4600000
flash_erase: Skipping bad block at f4800000
flash_erase: Skipping bad block at f4a00000
flash_erase: Skipping bad block at f4c00000
flash_erase: Skipping bad block at f4e00000
flash_erase: Skipping bad block at f5000000
flash_erase: Skipping bad block at f5200000
flash_erase: Skipping bad block at f5400000
flash_erase: Skipping bad block at f5600000
Erasing 2048 Kibyte @ f5a00000 -- 96 % complete flash_erase: Skipping bad block at f5c00000
flash_erase: Skipping bad block at f5e00000
flash_erase: Skipping bad block at f6000000
flash_erase: Skipping bad block at f6200000
flash_erase: Skipping bad block at f6400000
flash_erase: Skipping bad block at f6600000
flash_erase: Skipping bad block at f6800000
flash_erase: Skipping bad block at f6a00000
flash_erase: Skipping bad block at f6c00000
flash_erase: Skipping bad block at f6e00000
flash_erase: Skipping bad block at f7000000
flash_erase: Skipping bad block at f7200000
flash_erase: Skipping bad block at f7400000
flash_erase: Skipping bad block at f7600000
flash_erase: Skipping bad block at f7800000
flash_erase: Skipping bad block at f7a00000
flash_erase: Skipping bad block at f7c00000
flash_erase: Skipping bad block at f7e00000
flash_erase: Skipping bad block at f8000000
flash_erase: Skipping bad block at f8200000
flash_erase: Skipping bad block at f8400000
flash_erase: Skipping bad block at f8600000
flash_erase: Skipping bad block at f8800000
flash_erase: Skipping bad block at f8a00000
flash_erase: Skipping bad block at f8c00000
flash_erase: Skipping bad block at f8e00000
flash_erase: Skipping bad block at f9000000
flash_erase: Skipping bad block at f9200000
flash_erase: Skipping bad block at f9400000
flash_erase: Skipping bad block at f9600000
flash_erase: Skipping bad block at f9800000
flash_erase: Skipping bad block at f9a00000
flash_erase: Skipping bad block at f9c00000
flash_erase: Skipping bad block at f9e00000
flash_erase: Skipping bad block at fa000000
flash_erase: Skipping bad block at fa200000
flash_erase: Skipping bad block at fa400000
flash_erase: Skipping bad block at fa600000
flash_erase: Skipping bad block at fa800000
flash_erase: Skipping bad block at faa00000
flash_erase: Skipping bad block at fac00000
flash_erase: Skipping bad block at fae00000
flash_erase: Skipping bad block at fb000000
flash_erase: Skipping bad block at fb200000
flash_erase: Skipping bad block at fb400000
flash_erase: Skipping bad block at fb600000
flash_erase: Skipping bad block at fb800000
flash_erase: Skipping bad block at fba00000
flash_erase: Skipping bad block at fbc00000
flash_erase: Skipping bad block at fbe00000
flash_erase: Skipping bad block at fc000000
flash_erase: Skipping bad block at fc200000
flash_erase: Skipping bad block at fc400000
flash_erase: Skipping bad block at fc600000
flash_erase: Skipping bad block at fc800000
flash_erase: Skipping bad block at fca00000
flash_erase: Skipping bad block at fcc00000
flash_erase: Skipping bad block at fce00000
flash_erase: Skipping bad block at fd000000
flash_erase: Skipping bad block at fd200000
flash_erase: Skipping bad block at fd400000
flash_erase: Skipping bad block at fd600000
flash_erase: Skipping bad block at fd800000
flash_erase: Skipping bad block at fda00000
flash_erase: Skipping bad block at fdc00000
flash_erase: Skipping bad block at fde00000
flash_erase: Skipping bad block at fe000000
flash_erase: Skipping bad block at fe200000
flash_erase: Skipping bad block at fe400000
flash_erase: Skipping bad block at fe600000
Erasing 2048 Kibyte @ fee00000 -- 99 % complete flash_erase: Skipping bad block at ff000000
flash_erase: Skipping bad block at ff200000
flash_erase: Skipping bad block at ff400000
flash_erase: Skipping bad block at ff600000
Erasing 2048 Kibyte @ ff600000 -- 100 % complete