resize2fs

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Wat het doet

resize2fs DEVICE grows the file system to fill the device (also when mounted). With a size it can also shrink — only unmounted and after e2fsck -f. When you shrink, shrink the file system before the LV; when you grow, grow the LV first.

lvextend -r and lvreduce -r call it for you.

Zo schrijf je het

resize2fs [OPTION]... DEVICE [SIZE]

Opties 10

Meest gebruikt

SIZE: New size with unit (K, M, G, T, s = 512-byte sectors); without: fill the device.
-f: Force (skip safety checks).
-F: Flush the device buffers first.
-M: Shrink to the minimum size.
-P: Print the minimum size (estimate).
-p: Show progress.
-d FLAGS: Debug flags.
-S STRIDE: RAID stride.
-b, -s: Turn the 64bit feature on / off.
-z FILE: Save an undo file.

Voorbeelden 10

$ als gewone gebruiker# als root (of met sudo)

1Grow after lvextend

#lvextend -L +2G /dev/vgdata/lvweb
#resize2fs /dev/vgdata/lvweb

Online grow of a mounted ext4.

2Shrink to 3 GiB

#umount /docs
#e2fsck -f /dev/vgfiles/lvdocs
#resize2fs /dev/vgfiles/lvdocs 3G
#lvreduce -L 3G /dev/vgfiles/lvdocs
#mount /docs

The order matters: file system first.

3How small can it get?

#resize2fs -P /dev/vgfiles/lvdocs
Estimated minimum size of the filesystem: 140326

In blocks (usually 4 KiB).

4Shrink to the minimum
```
#resize2fs -M /dev/vgfiles/lvdocs
```
Before copying to a smaller disk.
5Show progress
```
#resize2fs -p /dev/vgdata/lvweb
```
For big file systems.
6Grow a partition-based ext4
```
#growpart /dev/vdb 1; resize2fs /dev/vdb1
```
After the disk was made bigger.
7Easier: let LVM do it
```
#lvextend -r -L +1G /dev/vgdata/lvweb
```
Calls resize2fs.
8Undo file for safety
```
#resize2fs -z /root/resize.undo /dev/vgfiles/lvdocs 3G
```
Restore with e2undo if something goes wrong.
9Check after resize
```
$df -h /docs
```
The new size.

10Mounted shrink fails

#resize2fs /dev/vgfiles/lvdocs 3G
resize2fs: On-line shrinking not supported

Unmount first.

Exitcodes

`0`	Done.
`1`	Error.

`resize2fs`

Wat het doet

Zo schrijf je het

Opties 10

Voorbeelden 10

1Grow after lvextend

2Shrink to 3 GiB

3How small can it get?

4Shrink to the minimum

5Show progress

6Grow a partition-based ext4

7Easier: let LVM do it

8Undo file for safety

9Check after resize

10Mounted shrink fails

Exitcodes

Volledige handleiding

Wat het doet

Zo schrijf je het

Opties 10

Voorbeelden 10

1Grow after lvextend

2Shrink to 3 GiB

3How small can it get?

4Shrink to the minimum

5Show progress

6Grow a partition-based ext4

7Easier: let LVM do it

8Undo file for safety

9Check after resize

10Mounted shrink fails

Exitcodes

Verwante commando's

Gebruikt in deze lessen

Volledige handleiding

`resize2fs`