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ubuntu格式化新磁盘并扩容到lvm

news 2026/3/26 19:29:00

环境:

OS:ubuntu 24

1.使用 fdisk -l 查看到这块新盘为/dev/sda
Disk /dev/sda: 931.51 GiB, 1000204886016 bytes, 1953525168 sectors

2.对新盘分区(不分区也可以)
好像需要将之前的删除掉

lsblk
sda                         8:0    0 931.5G  0 disk 
├─sda1                      8:1    0     1G  0 part 
└─sda2                      8:2    0 930.5G  0 partfdisk /dev/sda

命令模式下输入d 可删除分区

3.pvcreate直接创建pv
root@chenhuike-YangTianM4000q-00IRB:~# pvcreate /dev/sda
Cannot use /dev/sda: device is partitioned

解决办法:
# 1. 清除磁盘的分区表（会彻底清空 /dev/sda 所有数据，务必确认！）
dd if=/dev/zero of=/dev/sda bs=512 count=1
# 2. 刷新磁盘分区表，让系统识别变化
partprobe /dev/sda
# 3. 重新创建 PV（此时磁盘无分区，可直接操作整盘）
pvcreate /dev/sda
# 4. 验证 PV 创建成功
pvs

4.查看

root@YangTianM4000q-00IRB:~# pvscanPV /dev/nvme0n1p3   VG ubuntu-vg       lvm2 [<473.89 GiB / 0    free]PV /dev/sda                            lvm2 [931.51 GiB]Total: 2 [1.37 TiB] / in use: 1 [<473.89 GiB] / in no VG: 1 [931.51 GiB]

5.查看vg

root@YangTianM4000q-00IRB:~# vgdisplay--- Volume group ---VG Name               ubuntu-vgSystem ID             Format                lvm2Metadata Areas        1Metadata Sequence No  2VG Access             read/writeVG Status             resizableMAX LV                0Cur LV                1Open LV               1Max PV                0Cur PV                1Act PV                1VG Size               <473.89 GiBPE Size               4.00 MiBTotal PE              121315Alloc PE / Size       121315 / <473.89 GiBFree  PE / Size       0 / 0   VG UUID               Z3mU7l-OGra-XeMf-AmDe-yDcJ-U6Pr-yxEFWu

6.扩展vg

root@YangTianM4000q-00IRB:~#vgextend ubuntu-vg /dev/sda
root@YangTianM4000q-00IRB:~# vgdisplay--- Volume group ---VG Name               ubuntu-vgSystem ID             Format                lvm2Metadata Areas        2Metadata Sequence No  3VG Access             read/writeVG Status             resizableMAX LV                0Cur LV                1Open LV               1Max PV                0Cur PV                2Act PV                2VG Size               1.37 TiBPE Size               4.00 MiBTotal PE              359782Alloc PE / Size       121315 / <473.89 GiBFree  PE / Size       238467 / 931.51 GiBVG UUID               Z3mU7l-OGra-XeMf-AmDe-yDcJ-U6Pr-yxEFWu

7.扩展lv

root@YangTianM4000q-00IRB:~# lvdisplay--- Logical volume ---LV Path                /dev/ubuntu-vg/ubuntu-lvLV Name                ubuntu-lvVG Name                ubuntu-vgLV UUID                DOPkku-pxjU-uaSq-lUJi-jRSb-CqwX-YZKHq3LV Write Access        read/writeLV Creation host, time ubuntu, 2026-02-09 15:48:04 +0800LV Status              available# open                 1LV Size                <473.89 GiBCurrent LE             121315Segments               1Allocation             inheritRead ahead sectors     auto- currently set to     256Block device           252:0root@YangTianM4000q-00IRB:~# lvextend -l +100%FREE  /dev/ubuntu-vg/ubuntu-lvSize of logical volume ubuntu-vg/ubuntu-lv changed from <473.89 GiB (121315 extents) to 1.37 TiB (359782 extents).Logical volume ubuntu-vg/ubuntu-lv successfully resized.

8.查看磁盘类型

root@YangTianM4000q-00IRB:~# df -Th /
Filesystem                        Type  Size  Used Avail Use% Mounted on
/dev/mapper/ubuntu--vg-ubuntu--lv ext4  466G   14G  429G   4% /

9.扩容

root@YangTianM4000q-00IRB:~# resize2fs /dev/ubuntu-vg/ubuntu-lv
resize2fs 1.47.0 (5-Feb-2023)
Filesystem at /dev/ubuntu-vg/ubuntu-lv is mounted on /; on-line resizing required
old_desc_blocks = 60, new_desc_blocks = 176