我正在尝试在 debian 8 上使用 sfdisk 扩展分区。我正在运行以下命令：
sfdisk -H 255 -S 63 --quiet --Linux --leave-last -uM --force --no-reread /dev/md1 -N4 < /tmp/abc
运行命令时出现以下错误：
Successfully wrote the new partition table
Re-reading the partition table ...
sfdisk: BLKRRPART: Device or resource busy
sfdisk: The command to re-read the partition table failed.
Run partprobe(8), kpartx(8) or reboot your system now,before using mkfs
sfdisk: If you created or changed a DOS partition, /dev/foo7, say, then use dd(1) to zero the first 512 bytes: dd if=/dev/zero …