Error deleting partition /dev/sdb1: Command-line `parted --script "/dev/sdb" "rm 1"' exited with non-zero exit status 1: 警告: 磁盘描述表明物理块大小为 2048 字节，但 Linux 认为它是 512 字节。
(udisks-error-quark, 0)
我想格式化我已经烧入U盘的Ubuntu15.10镜像，可是无法格式化，并且出现以上提示

你先用分区编辑工具把优盘上分区删掉重新建立分区再格式化

你使用什麼工具燒錄

Partition(s) 1 on /dev/sdb have been written, but we have been unable to
inform the kernel of the change, probably because it/they are in use. As a
result, the old partition(s) will remain in use. You should reboot now
before making further changes.


先umount，或者用partprobe，实在不行就重启