ubuntu20.04挂载拓展盘保姆级流程
背景：跑模型玩时，发现机子硬盘太小了，搞个1t固态作为挂载盘。以下为操作全流程记录
1、开始root权限操作
sudo su
若进不去，考虑是否给root设置过密码，新系统第一次进入需要设置密码。
进入成功：
root@y:/#
2、查看硬盘挂载情况
lsblk
3、将未分配的硬盘的创建分区
fdish /dev/sda # 注意指令名称为2中表示的挂载盘名称
终端提示：
Command （m for help）：输入：n
依次输入p 和 1
接着便会提示卷的起始地址和结束地址，都保持默认按回车的即可（意思是只分一个区）
输入“w”保存并推出
检测分区成功：fdish -l
Device Start End Sectors Size Type
/dev/sda1 2048 1953525134 1953523087 931.5G Linux filesystem
至此，/dev/sda盘以分区成功（sda1,是正常的）
参考
4、初始化为pv
pvcreate /dev/sda1
创建成功校验：
root@y:/# pvdisplay
--- Physical volume ---
PV Name /dev/sda1
VG Name
PV Size 931.51 GiB / not usable 4.69 MiB
Allocatable yes
PE Size 4.00 MiB
Total PE 238466
Free PE 130
Allocated PE 238336
PV UUID nvOIhv-ccpX-40nH-u9x0-ZXBu-Jgnv-s3RTg
5、创建卷组（vg）并把pv加入卷组中
vgcreate h /dev/sda1
创建成功校验：
root@y:/# vgdisplay
--- Volume group ---
VG Name h
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 6
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 1
Open LV 1
Max PV 0
Cur PV 1
Act PV 1
VG Size <931.51 GiB
PE Size 4.00 MiB
Total PE 238466
Alloc PE / Size 238336 / 931.00 GiB
Free PE / Size 130 / 520.00 MiB
VG UUID YAy8nO-qfYK-5cZy-pFJz-ixAh-WVPZ-f3M4qV
6、基于卷组（vg）创建逻辑卷（lv）
lvcreate -n d -L 931G h
注意，d 是自己取的名字，931G是自己挂载盘的大小，此两根据个人情况调整
创建成功校验：
root@y:/# lvdisplay
--- Logical volume ---
LV Path /dev/h/d
LV Name d
VG Name h
LV UUID 712DiJ-DX8o-UINn-AUMT-REFm-UotT-nDUii7
LV Write Access read/write
LV Creation host, time y, 2023-10-06 16:05:37 +0800
LV Status available
# open 1
LV Size 931.00 GiB
Current LE 238336
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0
7、格式化逻辑卷并挂载
mkfs.ext4 /dev/h/d # 格式化逻辑卷，需要给全路径
mount /dev/h/d /mnt # 将已初始化的逻辑卷挂载到/mnt目录（该文件夹装系统时已自带且为空，可根据个人实际情况调整，注意给全路径）
参考
8、系统自动挂载操作
1）查看UUID与类型
sudo blkid
在打印输出查看挂载盘信息：
/dev/mapper/h-d: UUID="6b684323-82ca-47a9-bec9-d26b09364fdd" TYPE="ext4"
2）修改fstab文件
sudo vim /etc/fstab
目的添加
uuid 挂载文件夹 文件类型 defaults 0 2
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
#
# / was on /dev/nvme0n1p7 during installation
UUID=a80478f4-abf2-4354-9e01-5c986515f58d / ext4 errors=remount-ro 0 1
# /boot was on /dev/nvme0n1p5 during installation
UUID=0eda1190-5b7f-4670-a18a-f09d81ab5937 /boot ext4 defaults 0 2
# /boot/efi was on /dev/nvme0n1p1 during installation
UUID=A5EB-573A /boot/efi vfat umask=0077 0 1
# /home was on /dev/nvme0n1p8 during installation
UUID=07093e4a-3b5c-4b14-ae7f-ff1b5cb5616d /home ext4 defaults 0 2
# swap was on /dev/nvme0n1p6 during installation
UUID=d63a283a-2fab-4c0f-837c-20e47e9b81a5 none swap sw 0 0
# ylh_231006 /dev/mapper/h-d expand dish
UUID=6b684323-82ca-47a9-bec9-d26b09364fdd /mnt ext4 defaults 0 2
具体字段含义可参考
3)重启
reboot
4)校验自动挂载成功
(base) ylh@y:~$ df -lh
Filesystem Size Used Avail Use% Mounted on
udev 16G 0 16G 0% /dev
tmpfs 3.2G 2.2M 3.2G 1% /run
/dev/nvme0n1p7 47G 24G 21G 54% /
tmpfs 16G 252M 16G 2% /dev/shm
tmpfs 5.0M 4.0K 5.0M 1% /run/lock
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/loop0 128K 128K 0 100% /snap/bare/5
/dev/loop2 46M 46M 0 100% /snap/snap-store/638
/dev/loop1 64M 64M 0 100% /snap/core20/1828
/dev/loop3 205M 205M 0 100% /snap/cloudcompare/208
/dev/loop9 347M 347M 0 100% /snap/gnome-3-38-2004/119
/dev/loop4 56M 56M 0 100% /snap/core18/2790
/dev/loop5 64M 64M 0 100% /snap/core20/2015
/dev/loop8 50M 50M 0 100% /snap/snapd/18357
/dev/loop6 41M 41M 0 100% /snap/snapd/20092
/dev/loop7 92M 92M 0 100% /snap/gtk-common-themes/1535
/dev/loop10 350M 350M 0 100% /snap/gnome-3-38-2004/143
/dev/mapper/h-d 916G 181M 869G 1% /mnt
/dev/nvme0n1p5 943M 193M 685M 22% /boot
/dev/nvme0n1p8 101G 32G 64G 33% /home
/dev/nvme0n1p1 300M 51M 250M 17% /boot/efi
tmpfs 3.2G 20K 3.2G 1% /run/user/126
tmpfs 3.2G 44K 3.2G 1% /run/user/1000
/dev/mapper/h-d 916G 181M 869G 1% /mnt # 表示自动挂载成功
#############
好记性不如烂笔头
积少成多
觉得还不错的话，点赞收藏哈