1

This is the disk schema I have which is coming from lsblk and lvs. What I want to do is resize sda5 which is of type Extended to the size of the block device /dev/sda which is 100GB

   NAME             MAJ:MIN           RM      SIZE   RO    TYPE    MOUNTPOINT                              
sda              8:0               0       100G   0     disk                                            
|-sda1           8:1               0       243M   0     part    /boot                                   
|-sda2           8:2               0       1K     0     part                                            
`-sda5           8:5               0       49.8G  0     part                                            
|-osiris-root    254:0             0       45.8G  0     lvm     /                                       
`-osiris-swap_1  254:1             0       4G     0     lvm     [SWAP]                                  
sr0              11:0              1       1024M  0     rom                                             
LV               VG                Attr    LSize  Pool  Origin  Data%       Meta%  Move  Log  Cpy%Sync  Convert
root             osiris-wi-ao----  45.76g                                                               
swap_1           osiris-wi-ao----  4.00g

Is there any way to do it using parted, fdisk or any other tool? Thanks in advance.

fdisk -l /dev/sda* outputs

Disk /dev/sda: 100 GiB, 107374182400 bytes, 209715200 sectors 
Units: sectors of 1 * 512 = 512 bytes 
Sector size (logical/physical): 512 bytes / 512 bytes 
I/O size (minimum/optimal): 512 bytes / 512 bytes 
Disklabel type: dos 
Disk identifier: 0x00082e2b

Device Boot Start End Sectors Size Id Type 
/dev/sda1 * 2048 499711 497664 243M 83 Linux 
/dev/sda2 501758 104855551 104353794 49.8G 5 Extended 
/dev/sda5 501760 104855551 104353792 49.8G 8e Linux LVM

Disk /dev/sda1: 243 MiB, 254803968 bytes, 497664 sectors 
Units: sectors of 1 * 512 = 512 bytes 
Sector size (logical/physical): 512 bytes / 512 bytes 
I/O size (minimum/optimal): 512 bytes / 512 bytes 
Disk /dev/sda2: 1 KiB, 1024 bytes, 2 sectors 
Units: sectors of 1 * 512 = 512 bytes 
Sector size (logical/physical): 512 bytes / 512 bytes 
I/O size (minimum/optimal): 512 bytes / 512 bytes 
Disklabel type: dos 
Disk identifier: 0x00000000

Device Boot Start End Sectors Size Id Type 
/dev/sda2p1 2 104353793 104353792 49.8G 8e Linux LVM

Disk /dev/sda5: 49.8 GiB, 53429141504 bytes, 104353792 sectors 
Units: sectors of 1 * 512 = 512 bytes 
Sector size (logical/physical): 512 bytes / 512 bytes 
I/O size (minimum/optimal): 512 bytes / 512 bytes
Stephen Kitt
  • 434,908
holasz
  • 623

1 Answers1

2

To extend your sda5, you need to extend its container too, sda2. Using command-line tools, the simplest way to do this is to use sfdisk:

sfdisk /dev/sda

This will print the current partition table, which should match what you saw in fdisk:

Disk image: 100 GiB, 107374182400 bytes, 209715200 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xe59ec859

Old situation:

Device     Boot  Start       End   Sectors  Size Id Type
image1     *      2048    499711    497664  243M 83 Linux
image2          501758 104855551 104353794 49.8G  5 Extended
image5          501760 104855551 104353792 49.8G 83 Linux

Type 'help' to get more information.

At the >>> prompt, start re-defining all your partitions:

2048,497664,83,*

(this is the first partition: start sector, length in sectors, type, and a * to make it bootable). sfdisk will respond with

Created a new DOS disklabel with disk identifier 0x03408377.
Created a new partition 1 of type 'Linux' and of size 243 MiB.
      image1 :         2048       499711 (243M) Linux

and prompts for image2 (sda2). Enter

501758,,5

which tells sfdisk to create an extended partition starting at sector 501758 and occupying all the available space after that; sfdisk will output

Created a new partition 2 of type 'Extended' and of size 99.8 GiB.
      image2 :       501758    209715199 (99.8G) Extended

For image3, enter simply

501760

sfdisk will then output

Created a new partition 5 of type 'Linux' and of size 99.8 GiB.
      image5 :       501760    209715199 (99.8G) Linux

and prompt for image6, which we don’t need, so enter

quit

which will cause sfdisk to print the new partition table and ask if you want to write it to disk:

New situation:

Device     Boot  Start       End   Sectors  Size Id Type
image1     *      2048    499711    497664  243M 83 Linux
image2          501758 209715199 209213442 99.8G  5 Extended
image5          501760 209715199 209213440 99.8G 83 Linux

Do you want to write this to disk? [Y]es/[N]o:

If you’re convinced the starting sectors all match, and sda1 is still OK, press Y to write the partition table and return to your shell.

Once that’s done, run

pvresize /dev/sda5

to resize your LVM PV; you should then be able to use the newly-allocated disk space (in new LVs, or to extend existing LVs).

Stephen Kitt
  • 434,908