Disk Resize¶

Increase Disk Space¶

If it is a virtual machine, and this is the last partition on the disk it is easy.

1. Increase the disk size for the virtual machine.

2. lsblk will show that there is some free space (here 5GB)

   $ lsblk
   NAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
   fd0      2:0    1    4K  0 disk 
   sda      8:0    0   20G  0 disk 
   ├─sda1   8:1    0 19,1G  0 part /
   ├─sda2   8:2    0    1K  0 part 
   └─sda5   8:5    0  880M  0 part [SWAP]
   sdb      8:16   0   15G  0 disk 
   └─sdb1   8:17   0   10G  0 part /mnt1
   sr0     11:0    1 1024M  0 rom  
   

3. Install parted if not already done:

   Debian/Ubuntu

   sudo apt-get -y install parted
   

4. Now you show the details of the disk:

   $ sudo parted /dev/sdb print free
   Model: VMware Virtual disk (scsi)
   Disk /dev/sdb: 16,1GB
   Sector size (logical/physical): 512B/512B
   Partition Table: msdos
   Disk Flags: 
   
   Number  Start   End     Size    Type     File system  Flags
           1024B   1049kB  1048kB           Free Space
   1      1049kB  10,7GB  10,7GB  primary  ext4
           10,7GB  16,1GB  5369MB           Free Space
   

5. Now resize the partition to the end (use the value from above):

   $ sudo parted /dev/sdb resizepart 1
   Warning: Partition /dev/sdb1 is being used. Are you sure you want to continue?
   Yes/No? Yes
   End?  [10,7GB]? 16,1GB                                                    
   Information: You may need to update /etc/fstab.
   

6. If a logical volume is used, you can increase it now.

7. Now as the löast step the filesystem can be increased:

   $ sudo resize2fs /dev/sdb1
   resize2fs 1.46.2 (28-Feb-2021)
   Dateisystem bei /dev/sdb1 ist auf /mnt1 eingehängt; Online-Größenänderung ist
   erforderlich
   old_desc_blocks = 2, new_desc_blocks = 2
   Das Dateisystem auf /dev/sdb1 is nun 3930408 (4k) Blöcke lang.