分区信息：
[root@localhost /usr/mtd]# ./mtdinfo -a
Count of MTD devices: 2
Present MTD devices: mtd0, mtd1
Sysfs interface supported: yes
mtd0
Name: Partition 1
Type: nand
Eraseblock size: 131072 bytes, 128.0 KiB
Amount of eraseblocks: 32 (4194304 bytes, 4.0 MiB)
Minimum input/output unit size: 2048 bytes
Sub-page size: 2048 bytes
OOB size: 64 bytes
Character device major/minor: 90:0
Bad blocks are allowed: true
Device is writable: true
mtd1
Name: Partition 2
Type: nand
Eraseblock size: 131072 bytes, 128.0 KiB
Amount of eraseblocks: 992 (130023424 bytes, 124.0 MiB)
Minimum input/output unit size: 2048 bytes
Sub-page size: 2048 bytes
OOB size: 64 bytes
Character device major/minor: 90:2
Bad blocks are allowed: true
Device is writable: true
[root@localhost /usr/mtd]#
在第二分区上格式化就有问题了：
[root@localhost /usr/mtd]# ./ubiformat /dev/mtd1 -s 2048
ubiformat: mtd1 (nand), size 130023424 bytes (124.0 MiB), 992 eraseblocks of 131072 bytes (128.0 KiB), min. I/O size 2048 bytes
libscan: scanning eraseblock 991 -- 100 % complete
ubiformat: 19 bad eraseblocks found, numbers: 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 404, 420, 937
ubiformat: warning!: 973 of 973 eraseblocks contain non-ubifs data
ubiformat: continue? (yes/no) y
ubiformat: warning!: only 0 of 973 eraseblocks have valid erase counter
ubiformat: erase counter 0 will be used for all eraseblocks
ubiformat: note, arbitrary erase counter value may be specified using -e option
ubiformat: continue? (yes/no) y
ubiformat: use erase counter 0 for all eraseblocks
ubiformat: formatting eraseblock 18 -- 1 % complete libmtd: error!: cannot write 2048 bytes to mtd1 (eraseblock 18, offset 0)
error 5 (Input/output error)
ubiformat: error!: cannot write EC header (2048 bytes buffer) to eraseblock 18
error 5 (Input/output error)
libmtd: run torture test for PEB 18
libmtd: error!: erased PEB 18, but a non-0xFF byte found
ubiformat: mark it as bad? Continue (yes/no) y
ubiformat: marking block 18 bad
ubiformat: formatting eraseblock 19 -- 2 % complete libmtd: error!: cannot write 2048 bytes to mtd1 (eraseblock 19, offset 0)
error 5 (Input/output error)
ubiformat: error!: cannot write EC header (2048 bytes buffer) to eraseblock 19
error 5 (Input/output error)
libmtd: run torture test for PEB 19
libmtd: error!: erased PEB 19, but a non-0xFF byte found
ubiformat: mark it as bad? Continue (yes/no) y
ubiformat: marking block 19 bad
ubiformat: formatting eraseblock 20 -- 2 % complete libmtd: error!: cannot write 2048 bytes to mtd1 (eraseblock 20, offset 0)
error 5 (Input/output error)
ubiformat: error!: cannot write EC header (2048 bytes buffer) to eraseblock 20
error 5 (Input/output error)
libmtd: run torture test for PEB 20
libmtd: error!: erased PEB 20, but a non-0xFF byte found
ubiformat: mark it as bad? Continue (yes/no) y
ubiformat: marking block 20 bad
ubiformat: formatting eraseblock 21 -- 2 % complete libmtd: error!: cannot write 2048 bytes to mtd1 (eraseblock 21, offset 0)
error 5 (Input/output error)
ubiformat: error!: cannot write EC header (2048 bytes buffer) to eraseblock 21
error 5 (Input/output error)
libmtd: run torture test for PEB 21
libmtd: error!: erased PEB 21, but a non-0xFF byte found
ubiformat: mark it as bad? Continue (yes/no) y
ubiformat: marking block 21 bad
ubiformat: error!: consecutive bad blocks exceed limit: 4, bad flash?
[root@localhost /usr/mtd]#
挂载也有问题：
[root@localhost /usr/mtd]# ./ubiattach -p /dev/mtd1
UBI: attaching mtd1 to ubi0
UBI: physical eraseblock size: 131072 bytes (128 KiB)
UBI: logical eraseblock size: 126976 bytes
UBI: smallest flash I/O unit: 2048
UBI: VID header offset: 2048 (aligned 204
UBI: data offset: 4096
UBI: max. sequence number: 0
UBI error: ubi_read_volume_table: the layout volume was not found
UBI error: ubi_attach_mtd_dev: failed to attach by scanning, error -22
ubiattach: error!: cannot attach "/dev/mtd1"
error 22 (Invalid argument)
[root@localhost /usr/mtd]#
用ubiformat后就越用坏块越多，好像被他误标了。作者: amaverick 时间: 2012-08-03 11:08
UBI device number 7, total 1024 LEBs (130023424 bytes, 124.0 MiB), available 0 L
EBs (0 bytes), LEB size 126976 bytes (124.0 KiB)
UBI error: ubi_read_volume_table: the layout volume was not found
ubiattach: error!: cannot attach "/dev/mtd1"
error 22 (Invalid argument)
这个我也遇到，什么原因？
