卷组(Volume Group)简称VG,它是一个或者多个物理卷的组合。卷组将多个物理卷组合在一起,形成一个可管理的单元,它类似于非LVM系统中的物理硬盘。
1、查看卷组
2、vgrename 改名
3、修改后查看
4、修改分区表文件
# 把原来的 卷组名改成新的
# /etc/fstab
# Created by anaconda on Wed Sep 11 15:08:38 2019
#
# 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/vg110-root / xfs defaults 0 0
UUID=10cfe3d5-58a3-4428-b21c-dfbebdc167f5 /boot xfs defaults 0 0
/dev/mapper/vg110-swap swap swap defaults 0 0
5、修改引导文件
ecf-95c1fbd807b8' {
load_video
set gfxpayload=keep
insmod gzio
insmod part_msdos
insmod xfs
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint='hd0,msdos1' 10cfe3d5-58a3-4428-b21c-dfbebdc167f5
else
search --no-floppy --fs-uuid --set=root 10cfe3d5-58a3-4428-b21c-dfbebdc167f5
fi
linux16 /vmlinuz-3.10.0-957.el7.x86_64 root=/dev/mapper/vg110-root ro crashkernel=auto rd.lvm.lv=vg110/root rd.lvm.lv=vg110/swap console=ttyS0 LANG=zh_CN.UTF-8
initrd16 /initramfs-3.10.0-957.el7.x86_64.img
}
menuentry 'CentOS Linux (0-rescue-9eca413fff8c46e1a9c0b5a0e83bd011) 7 (Core)' --class centos --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-0-rescue-9eca413fff8c46e1a9c0b5a0e83bd011-advanced-079b49a0-3722-4fa1-9ecf-95c1fbd807b8' {
load_video
insmod gzio
insmod part_msdos
insmod xfs
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint='hd0,msdos1' 10cfe3d5-58a3-4428-b21c-dfbebdc167f5
else
search --no-floppy --fs-uuid --set=root 10cfe3d5-58a3-4428-b21c-dfbebdc167f5
fi
linux16 /vmlinuz-0-rescue-9eca413fff8c46e1a9c0b5a0e83bd011 root=/dev/mapper/vg110-root ro crashkernel=auto rd.lvm.lv=vg110/root rd.lvm.lv=vg110/swap console=ttyS0
initrd16 /initramfs-0-rescue-9eca413fff8c46e1a9c0b5a0e83bd011.img
}
重新启动,如果没有修改 /etc/fstab、/etc/grub2.cfg 这两个文件,系统将无法启动