HDD size not correct

[amir385276]

Hi guys
i have a big issue
in the Centos 8 with 100GB HDD have a 2 size in the os
in the partedg show me the 99GB but in the df -h show me the 45GB

how to fix this issue
clip 13 - clip 14
thanks

[TrevorH]

Post the output from the following, all except the last need to be run as root (or via sudo)

pvs
vgs
lvs
df -m

[amir385276]

Hi again TrevorH

see the clip16

thanks

[TrevorH]

So you have 50G spare in your current LVM Volume Group so can expand the cl-root LV from its current 46.83G to anything up to 93GB. Use man lvextend to see the way to use it and pay special attention to the -r switch as it will save you a subsequent step.

[jlehtone]

Out of curiosity: how was this system installed?
The installer's default is to create the '/boot', the root as LV, and 'swap' as LV, but '/home' as LV. [Edit: there was swap]
Yours is thus custom.


PS. One can usually copy-paste text from console into forum post (and format with code tags). Text is more convenient than bitmap images.

[amir385276]

Hi again TrevorH
I try something to extend the HDD but there is nothing
df -h = show me the 48GB

see the clip 17

thanks

[amir385276]

[root@198232002341490545939 ~]# lvextend -L +12800 /dev/mapper/cl-root
Insufficient free space: 3200 extents needed, but only 0 available
[root@198232002341490545939 ~]# resize2fs -f /dev/mapper/cl-root
resize2fs 1.45.6 (20-Mar-2020)
resize2fs: Bad magic number in super-block while trying to open /dev/mapper/cl-root
Couldn't find valid filesystem superblock.
[root@198232002341490545939 ~]#

[jlehtone]

I try something to extend the HDD but there is nothing

"something" is not descriptive. You do show that you have increased the size of LV.

[root@198232002341490545939 ~]# lvextend -L +12800 /dev/mapper/cl-root
Insufficient free space: 3200 extents needed, but only 0 available
[root@198232002341490545939 ~]# resize2fs -f /dev/mapper/cl-root
resize2fs 1.45.6 (20-Mar-2020)
resize2fs: Bad magic number in super-block while trying to open /dev/mapper/cl-root
Couldn't find valid filesystem superblock.
[root@198232002341490545939 ~]#

If you did extend the LV already, then there are no more free extents in the VG, so naturally the new 'lvenxtend' will fail.

You have nowhere shown what filesystem is in 'cl-root'.
The 'lvextend -r ...' would have called appropriate "resize filesystem" command.
The 'resize2fs' works with some filesystem types, but not all.

To see filesystem:

Code: Select all

lsblk -o NAME,SIZE,TYPE,FSTYPE,MOUNTPOINT

[amir385276]

Hi guys
i try the trevorH commands
and i don't know why the df -h show me the 47GB

i'm confused
see clip18
thanks

[amir385276]

I try this
resize2fs /dev/mapper/cl-root
resize2fs: Bad magic number in super-block while trying to open /dev/mapper/cl-root
Couldn't find valid filesystem superblock.

thanks