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延展系統硬碟

系統管理員 edited this page 2026-03-06 06:11:42 +00:00

Table of Contents

• 1. 確認磁碟大小
• 2. 調整硬碟大小
• 3. 調整 PV 大小
• 4. 調整 LV 大小

1. 確認磁碟大小

lsblk

NAME                      MAJ:MIN RM  SIZE RO TYPE MOUNTPOINTS
sda                         8:0    0   64G  0 disk 
├─sda1                      8:1    0    1M  0 part 
├─sda2                      8:2    0    2G  0 part /boot
└─sda3                      8:3    0   30G  0 part 
  └─ubuntu--vg-ubuntu--lv 252:0    0   30G  0 lvm  /
sr0                        11:0    1 1024M  0 rom  

2. 調整硬碟大小

sudo fdisk /dev/sda

Command (m for help): p
Device       Start      End  Sectors  Size Type
/dev/sda1     2048     4095     2048    1M BIOS boot
/dev/sda2     4096  4198399  4194304    2G Linux filesystem
/dev/sda3  4198400 67108830 62910431   30G Linux filesystem

Command (m for help): d
Partition number (1-3, default 3):
Partition 3 has been deleted.

Command (m for help): n
Partition number (3-128, default 3): 
First sector (3719168-46137310, default 3719168): 
Last sector, +/-sectors or +/-size{K,M,G,T,P} (3719168-46137310, default 46135295):
Created a new partition 3 of type 'Linux filesystem' and of size 62 GiB.
Partition #3 contains a LVM2_member signature.
Do you want to remove the signature? [Y]es/[N]o: N

Command (m for help): p
Device       Start       End   Sectors  Size Type
/dev/sda1     2048      4095      2048    1M BIOS boot
/dev/sda2     4096   4198399   4194304    2G Linux filesystem
/dev/sda3  4198400 124217694 130019295   62G Linux filesystem

Command (m for help): w
The partition table has been altered.
Syncing disks.

3. 調整 PV 大小

sudo pvresize /dev/sda3

4. 調整 LV 大小

sudo lvextend -l +100%FREE /dev/ubuntu-vg/ubuntu-lv

sudo resize2fs /dev/ubuntu-vg/ubuntu-lv