Arch Linux

YagokoroEirin

Banned

Registered: 2020-10-28

Posts: 7

[SOLVED]My lvm seems to have lost 50G capacity

One month ago,I install Arch with lvm.And I found a problem today.

Physical volume size is 150G,but Volume group size and Logical volume size is "<150G".Actually their size is only 90G.
Then I run "sudo df -h /dev/linux-root/lvroot"
This is the output:

sudo df -h /dev/linux-root/lvroot

文件系统                        容量  已用  可用 已用% 挂载点
/dev/mapper/linux--root-lvroot  148G   90G   51G   64% /

It seems to mean that the unused capacity is 50G.

------------------------------this is shell output about lvm--------------------------------------

chippy@Archlinux  ~  sudo pvdisplay /dev/nvme0n1p7               
  --- Physical volume ---
  PV Name               /dev/nvme0n1p7
  VG Name               linux-root
  PV Size               151.09 GiB / not usable 3.69 MiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              38679
  Free PE               0
  Allocated PE          38679
  PV UUID               Joe8g0-5Fpn-b7ki-GGKt-EjCB-EK6D-71nc3F

   
 

chippy@Archlinux  ~  sudo vgdisplay /dev/linux-root              

  --- Volume group ---
  VG Name               linux-root
  System ID             
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  2
  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               <151.09 GiB
  PE Size               4.00 MiB
  Total PE              38679
  Alloc PE / Size       38679 / <151.09 GiB
  Free  PE / Size       0 / 0   
  VG UUID               3z8dad-x5O1-JXCz-rfwn-5Xij-yGsN-yafcY6 

   
 

chippy@Archlinux  ~  sudo lvdisplay /dev/linux-root/lvroot       

  --- Logical volume ---
  LV Path                /dev/linux-root/lvroot
  LV Name                lvroot
  VG Name                linux-root
  LV UUID                oIB4R4-7B0n-vB43-0Acr-lUY0-JkLU-u4AGsI
  LV Write Access        read/write
  LV Creation host, time archiso, 2021-07-06 18:30:56 +0800
  LV Status              available
  # open                 1
  LV Size                <151.09 GiB
  Current LE             38679
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           254:0 

___________________________________________________

How can I retrieve the lost 50G capacity?

Last edited by YagokoroEirin (2021-07-25 00:26:01)

ayekat

Member

Registered: 2011-01-17

Posts: 1,633

Re: [SOLVED]My lvm seems to have lost 50G capacity

The 50GiB is not "lost capacity", it's simply unused/available space inside the filesystem (df shows the filesystem usage information).

The output there means: "This filesystem is 148G big, of which you have used 90G, and so 51G remain". The numbers don't add up due to reserved blocks (most likely).

---

pkgs │ hacks │ cfg │ blag

2ManyDogs

Forum Fellow

Registered: 2012-01-15

Posts: 4,648

Re: [SOLVED]My lvm seems to have lost 50G capacity

YagokoroEirin, please read How to Post.

Please edit your post and change the topic title to remove the redundant "Help!" and give us a more descriptive title. Then use [ code ] tags around the output in your post.

https://wiki.archlinux.org/title/Genera … s_and_code
https://bbs.archlinux.org/help.php#bbcode

When your problem is solved, please remember to mark your thread [SOLVED] (edit the title of your first post).

Moving to Newbie Corner.

Last edited by 2ManyDogs (2021-07-24 22:50:53)