# 逻辑卷删除的基本概念
# 删除逻辑卷
# 会删除逻辑卷上的所有数据
# 需要先卸载文件系统
# 需要先备份数据

# lvremove命令详解

# 1. 删除逻辑卷
# lvremove /dev/datavg/datalv
Do you really want to remove active logical volume datavg/datalv? [y/n]: y
Logical volume “datalv” successfully removed

# 2. 强制删除逻辑卷
# lvremove -f /dev/datavg/datalv
Logical volume “datalv” successfully removed

# 3. 删除逻辑卷并显示详细信息
# lvremove -v /dev/datavg/datalv
Finding logical volume datavg/datalv
Archiving logical volume datavg/datalv
Deactivating logical volume datavg/datalv
Removing logical volume datavg/datalv
Logical volume “datalv” successfully removed

# 4. 删除逻辑卷并确认
# lvremove -y /dev/datavg/datalv
Logical volume “datalv” successfully removed

# 5. 删除多个逻辑卷
# lvremove /dev/datavg/datalv1 /dev/datavg/datalv2
Do you really want to remove active logical volume datavg/datalv1? [y/n]: y
Logical volume “datalv1” successfully removed
Do you really want to remove active logical volume datavg/datalv2? [y/n]: y
Logical volume “datalv2” successfully removed

# 6. 查看lvremove命令的帮助
# lvremove –help

# 删除前的准备工作

# 1. 备份数据
# 备份逻辑卷上的所有数据
# tar -czf /backup/data.tar.gz /data

# 2. 卸载文件系统
# umount /data

# 3. 检查逻辑卷状态
# lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
datalv datavg -wi-a—– 30.00g
root rhel -wi-ao—- 45.00g
swap rhel -wi-ao—- 4.00g

# 4. 检查逻辑卷是否被使用
# lvs -a -o +devices
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert Devices
datalv datavg -wi-a—– 30.00g /dev/vdb1(0)
root rhel -wi-ao—- 45.00g /dev/vda2(0)
swap rhel -wi-ao—- 4.00g /dev/vda2(11520)

# 5. 检查挂载点
# mount | grep /data
# 无输出表示已卸载

# 6. 检查进程
# lsof /data
# 无输出表示没有进程使用

# 场景：删除逻辑卷

# 1. 查看逻辑卷
# lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
datalv datavg -wi-ao—- 30.00g
root rhel -wi-ao—- 45.00g
swap rhel -wi-ao—- 4.00g

# 2. 查看挂载点
# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 3.8G 0 3.8G 0% /dev
tmpfs 3.9G 0 3.9G 0% /dev/shm
tmpfs 3.9G 9.0M 3.8G 1% /run
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/mapper/rhel-root 45G 3.5G 42G 8% /
/dev/vda1 1014M 194M 821M 20% /boot
tmpfs 781M 0 781M 0% /run/user/0
/dev/mapper/datavg-datalv 30G 10G 20G 33% /data

# 3. 备份数据
# tar -czf /backup/data.tar.gz /data
# tar -tzf /backup/data.tar.gz | head -20
/data/
/data/test.txt
/data/lost+found/

# 4. 卸载文件系统
# umount /data

# 5. 验证卸载
# df -h | grep /data
# 无输出表示已卸载

# 6. 检查逻辑卷状态
# lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
datalv datavg -wi-a—– 30.00g
root rhel -wi-ao—- 45.00g
swap rhel -wi-ao—- 4.00g

# 7. 删除逻辑卷
# lvremove /dev/datavg/datalv
Do you really want to remove active logical volume datavg/datalv? [y/n]: y
Logical volume “datalv” successfully removed

# 8. 查看逻辑卷
# lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
root rhel -wi-ao—- 45.00g
swap rhel -wi-ao—- 4.00g

# 9. 查看卷组
# vgs
VG #PV #LV #SN Attr VSize VFree
datavg 1 0 0 wz–n- 50.00g 50.00g
rhel 1 2 0 wz–n- 49.00g 0

# 10. 删除/etc/fstab中的挂载配置
# sed -i ‘/datavg/datalv/d’ /etc/fstab

# 11. 验证/etc/fstab
# cat /etc/fstab
#
# /etc/fstab
# Created by anaconda on Thu Mar 31 10:00:00 2026
#
# Accessible filesystems, by reference, are maintained under ‘/dev/disk/’
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/rhel-root / xfs defaults 0 0
UUID=12345678-90ab-cdef-1234-567890abcdef /boot xfs defaults 0 0
/dev/mapper/rhel-swap swap swap defaults 0 0