问题说明
新装的Linux系统，两块硬盘，一块作为系统磁盘，另一块作为数据磁盘，安装完系统后，由于该数据磁盘中包含之前残余的LVM信息，无法对数据磁盘无法进行操作。
新系统启动后，通过fdisk -l查看磁盘信息如下
Disk /dev/sda: 10.7 TiB, 11756399230976 bytes, 22961717248 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: 05120572-BCE8-4A9B-ABB0-492A152E43F2
....
....
Disk /dev/mapper/ars--vg-root: 10.7 TiB, 11754843144192 bytes, 22958678016 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk /dev/mapper/ars--vg-swap_1: 968 MiB, 1015021568 bytes, 1982464 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
root@hos:/home/ars# ll /dev/sd*
brw-rw---- 1 root disk 8, 0 Jan 7 08:33 /dev/sda
brw-rw---- 1 root disk 8, 2 Jan 7 08:33 /dev/sda2
brw-rw---- 1 root disk 8, 16 Jan 7 08:13 /dev/sdb
brw-rw---- 1 root disk 8, 32 Jan 7 08:13 /dev/sdc
brw-rw---- 1 root disk 8, 48 Jan 7 08:13 /dev/sdd
brw-rw---- 1 root disk 8, 64 Jan 7 08:13 /dev/sde
brw-rw---- 1 root disk 8, 80 Jan 7 08:13 /dev/sdf
brw-rw---- 1 root disk 8, 96 Jan 7 08:13 /dev/sdg
brw-rw---- 1 root disk 8, 112 Jan 7 08:13 /dev/sdh
brw-rw---- 1 root disk 8, 128 Jan 7 08:13 /dev/sdi
brw-rw---- 1 root disk 8, 144 Jan 7 08:13 /dev/sdj
brw-rw---- 1 root disk 8, 160 Jan 7 08:13 /dev/sdk
brw-rw---- 1 root disk 8, 176 Jan 7 08:13 /dev/sdl
brw-rw---- 1 root disk 8, 192 Jan 7 08:13 /dev/sdm
brw-rw---- 1 root disk 8, 193 Jan 7 08:13 /dev/sdm1
brw-rw---- 1 root disk 8, 194 Jan 7 08:13 /dev/sdm2
对sdb1进行格式化，无法进行格式化，提示如下
[root@ovirt-host ~]# mkfs.ext4 /dev/sda
mke2fs 1.41.12 (17-May-2010)
/dev/sda is apparently in use by the system; will not make a filesystem here!解决方法
通过dm解决问题，查看dm状态，显示dm设备信息
root@hos:/home/ars# dmsetup status
ars--vg-swap_1: 0 1982464 linear
ars--vg-root: 0 22958678016 linear 删除dm信息，并再次查看dm状态信息
[root@ovirt-host ~]# dmsetup remove_all
[root@ovirt-host ~]# dmsetup status
No devices found此次dm已经找不到设备，再次通过fdisk查看磁盘信息，已经没有dm设备信息了
Disk /dev/sda: 10.7 TiB, 11756399230976 bytes, 22961717248 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: 05120572-BCE8-4A9B-ABB0-492A152E43F2
....
....然后进行格式化
