WhyCan Forum(哇酷开发者社区)

[    1.124750] Creating 7 MTD partitions on "spi0.0":
[    1.130179] 0x000000000000-0x000000100000 : "uboot"
[    1.137419] 0x000000100000-0x000000380000 : "boot"
[    1.144859] 0x000000380000-0x000000600000 : "rootfs"
[    1.152417] 0x000000600000-0x000000b00000 : "extend"
[    1.159936] 0x000000b00000-0x000000d00000 : "rootfs_data"
[    1.167830] 0x000000d00000-0x000000d20000 : "env"
[    1.175241] 0x000000d20000-0x0000010f7e00 : "UDISK"
[    1.181242] mtd: partition "UDISK" extends beyond the end of device "spi0.0" -- size truncated to 0x2e0000

tina配置的分区中并没有UDISK,但是在打包过程中,update_mbr这个工具,手动附加了一个UDISK分区.

请问这个分区有什么用处?