UBI error: ubi_read_volume_table: the layout volume was not found

1.ubi命令

ubifs常见命令
flash_erase /dev/mtdx 0 0　　擦除

ubiformat /dev/mtdx　　　　格式化磁盘

ubiattach /dev/ubi_ctrl -m x　　添加分区

ubimkvol /dev/ubi0 -Nrootfs -m

ubimkvol /dev/ubi0 -Nrootfs -s xxxxKiB

ubimkvol /dev/ubi0 -Ndatafs -s xxxxKiB

mount -t ubifs ubi0:rootfs /xxxxx

mount -t ubifs ubi0:datafs /xxxx

 2.问题以及解决方案

[root@xxxx /]#ubiattach /dev/ubi_ctrl -m 8
UBI error: ubi_read_volume_table: the layout volume was not found
UBI error: ubi_attach_mtd_dev: failed to attach mtd8, error -22
ubiattach: error!: cannot attach mtd8
           error 22 (Invalid argument)

上面报错是因为/dev/mtd8分区没有格式化，所以需要如下操作

[root@xxxx /]#ubiformat /dev/mtd8
ubiformat: mtd8 (nand), size 822083584 bytes (784.0 MiB), 6272 eraseblocks of 131072 bytes (128.0 KiB), min. I/O size 2048 bytes
libscan: scanning eraseblock 6271 -- 100 % complete  
ubiformat: 4523 eraseblocks have valid erase