partx -d -nr /dev/sdb

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wx58196ecc0dce1 2020-03-10 11:51:18 ©著作权

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[root@centos6 ~]#mount --显示挂载的文件系统

/dev/sda2 on / type ext4 (rw) proc on /proc type proc (rw) sysfs on /sys type sysfs (rw) devpts on /dev/pts type devpts (rw,gid=5,mode=620) tmpfs on /dev/shm type tmpfs (rw) /dev/sda1 on /boot type ext4 (rw) none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw) /dev/sda3 on /data type ext4 (rw) /mnt/disk on /mnt/xdisk type ext4 (rw,loop=/dev/loop0) /dev/sdb1 on /mnt/sdb1 type ext4 (rw) ---显示是挂载的 [root@centos6 ~]#umount /mnt/sdb1 ---取消挂载

[root@centos6 ~]#lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT loop0 7:0 0 100M 0 loop /mnt/xdisk sda 8:0 0 200G 0 disk ├─sda1 8:1 0 1G 0 part /boot ├─sda2 8:2 0 97.7G 0 part / ├─sda3 8:3 0 48.8G 0 part /data ├─sda4 8:4 0 1K 0 part └─sda5 8:5 0 2G 0 part [SWAP] sdb 8:16 0 20G 0 disk └─sdb1 8:17 0 1G 0 part -------------显示有分区 sr0 11:0 1 1024M 0 rom
loop100 7:100 0 100M 0 loop [root@centos6 ~]#dd if=/dev/zero of=/dev/sdb1 bs=1 count=512---去掉分区表 512+0 records in 512+0 records out 512 bytes (512 B) copied, 0.0042738 s, 120 kB/s [root@centos6 ~]# [root@centos6 ~]# [root@centos6 ~]# [root@centos6 ~]#lsblk --------查看分区信息没同步 NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT loop0 7:0 0 100M 0 loop /mnt/xdisk sda 8:0 0 200G 0 disk ├─sda1 8:1 0 1G 0 part /boot ├─sda2 8:2 0 97.7G 0 part / ├─sda3 8:3 0 48.8G 0 part /data ├─sda4 8:4 0 1K 0 part └─sda5 8:5 0 2G 0 part [SWAP] sdb 8:16 0 20G 0 disk └─sdb1 8:17 0 1G 0 part --------------仍然存在这是信息没同步导致的 sr0 11:0 1 1024M 0 rom
loop100 7:100 0 100M 0 loop [root@centos6 ~]#par parec parecord parted partprobe partx