Linux线性拼接多设备文件

a

#!/bin/bash

if [ $# -lt 2 ]; then
  echo "Usage: command <joined-name> <device-to-join>..."
  exit
fi

joined_name=$1
shift

offset=0
for arg in "$@"; do
  size=$(blockdev --getsz "$arg")
  echo "$offset $size linear $arg 0"
  offset=$((offset+size))
done | dmsetup create "$joined_name"

a.md

用法：bash <joined-name> <device-to-join>...

参考：https://www.kernel.org/doc/html/latest/admin-guide/device-mapper/linear.html

移除：

dmsetup remove <device-name>