1

I am running Ubuntu 16.04 server with a desktop GUI installed. I have two 1TB hard drives divided into four partitions each with a Raid 1 array.

I need to increase the size of the array my root partition is on as it is only 9.3GB and I am getting messages that it is running out of space.

As far as I can tell, there is no space available to do this. I came to this conclusion by adding up the sizes of the partitions in lsblk which came to 931GB which Google says is the actual capacity of a 1TB HDD.

So I want to reduce the size of one of the arrays which is 913GB and set up as LVM (sdc5 and sdb5) to create room to increase the root array size. I have reduced the VG size to 878.9GB and the file system size to 880GB but I cannot figure out how to reduce the size of the partitions sdc5 and sbd5.

Google says to boot into a live USB and use Gparted to resize the partitions but this is not working. The resize dialogue box says "Minimum size: 935749 MiB" and "Maximum size: 935748 MiB" (the minimum size is in excess of the maximum size?). I am wondering if this is because the partition is part of a Raid set up? Anyway any pointers would be gratefully received.

ubuntu@ubuntu:~$ sudo parted -l
Model: ATA WDC WD2500AAKS-0 (scsi)
Disk /dev/sda: 250GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags: 

Number  Start   End    Size   Type     File system  Flags
 1      1049kB  250GB  250GB  primary               lvm


Model: ATA ST3160815AS (scsi)
Disk /dev/sdb: 160GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags: 

Number  Start   End    Size   Type     File system  Flags
 1      1049kB  160GB  160GB  primary  ext4


Model: ATA WDC WD10EZEX-00M (scsi)
Disk /dev/sdc: 1000GB
Sector size (logical/physical): 512B/4096B
Partition Table: msdos
Disk Flags: 

Number  Start   End     Size    Type      File system     Flags
 1      1049kB  1000MB  999MB   primary   ext4            boot, raid
 2      1000MB  9000MB  8000MB  primary   linux-swap(v1)  raid
 3      9000MB  19.0GB  10.0GB  primary   ext4            raid
 4      19.0GB  1000GB  981GB   extended
 5      19.0GB  1000GB  981GB   logical   ext4            raid


Model: ATA WDC WD10EZEX-00M (scsi)
Disk /dev/sdd: 1000GB
Sector size (logical/physical): 512B/4096B
Partition Table: msdos
Disk Flags: 

Number  Start   End     Size    Type      File system     Flags
 1      1049kB  1000MB  999MB   primary   ext4            boot, raid
 2      1000MB  9000MB  8000MB  primary   linux-swap(v1)  raid
 3      9000MB  19.0GB  10.0GB  primary   ext4            raid
 4      19.0GB  1000GB  981GB   extended
 5      19.0GB  1000GB  981GB   logical   ext4            raid


Model: General USB Flash Disk (scsi)
Disk /dev/sde: 8023MB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags: 

Number  Start   End     Size    Type     File system  Flags
 1      1049kB  8023MB  8022MB  primary  fat32        boot, lba


Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/fileserver-sda1: 107GB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Disk Flags: 

Number  Start  End    Size   File system  Flags
 1      0.00B  107GB  107GB  ext4


Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/fileserver-sda2: 107GB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Disk Flags: 

Number  Start  End    Size   File system  Flags
 1      0.00B  107GB  107GB  ext4


Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/fileserver-sda3: 35.3GB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Disk Flags: 

Number  Start  End     Size    File system  Flags
 1      0.00B  35.3GB  35.3GB  ext4

lsblk -fmi:

NAME                FSTYPE            LABEL       UUID                                   MOUNTPOINT NAME                  SIZE OWNER GROUP MODE
sdd                                                                                                 sdd                 931.5G root  disk  brw-rw----
|-sdd2              linux_raid_member ubuntu:1    a22d92d5-47cb-5c9a-8b96-7fc011d0f92f   [SWAP]     |-sdd2                7.5G root  disk  brw-rw----
|-sdd5              linux_raid_member ubuntu:3    737f5b0e-d298-54b6-03d8-8880efcfc975              |-sdd5              913.8G root  disk  brw-rw----
|-sdd3              linux_raid_member ubuntu:2    2415dcac-1137-5e3b-8b9e-9081ea4dec55              |-sdd3                9.3G root  disk  brw-rw----
`-sdd1              linux_raid_member ubuntu:0    e9109b99-4fe9-f2b6-822f-b337ad263be4              `-sdd1                953M root  disk  brw-rw----
sdb                                                                                                 sdb                 149.1G root  disk  brw-rw----
`-sdb1              ext4                          a67ad9ce-c929-49cc-8a20-5e19c1ed4dcd              `-sdb1              149.1G root  disk  brw-rw----
sde                                                                                                 sde                   7.5G root  disk  brw-rw----
`-sde1              vfat              UBUNTU 16_0 BE8A-FD07                              /cdrom     `-sde1                7.5G root  disk  brw-rw----
loop0               squashfs                                                             /rofs      loop0                 1.4G root  disk  brw-rw----
sdc                                                                                                 sdc                 931.5G root  disk  brw-rw----
|-sdc2              linux_raid_member ubuntu:1    a22d92d5-47cb-5c9a-8b96-7fc011d0f92f   [SWAP]     |-sdc2                7.5G root  disk  brw-rw----
|-sdc5              linux_raid_member ubuntu:3    737f5b0e-d298-54b6-03d8-8880efcfc975              |-sdc5              913.8G root  disk  brw-rw----
|-sdc3              linux_raid_member ubuntu:2    2415dcac-1137-5e3b-8b9e-9081ea4dec55              |-sdc3                9.3G root  disk  brw-rw----
`-sdc1              linux_raid_member ubuntu:0    e9109b99-4fe9-f2b6-822f-b337ad263be4              `-sdc1                953M root  disk  brw-rw----
sda                                                                                                 sda                 232.9G root  disk  brw-rw----
`-sda1              LVM2_member                   xGPEez-V4f7-cnpX-c0Hd-o5bE-JCG1-7a91cy            `-sda1              232.9G root  disk  brw-rw----
  |-fileserver-sda2 ext4              sda2        4d26bf3c-c47f-4f11-a73c-562b236d7b37                |-fileserver-sda2   100G root  disk  brw-rw----
  |-fileserver-sda3 ext4              sda3        b1a667b4-a686-456a-b0ac-6ee97392417c                |-fileserver-sda3  32.9G root  disk  brw-rw----
  `-fileserver-sda1 ext4              sda1        233c3363-bfa5-4e63-8452-7ecdf951abf0                `-fileserver-sda1   100G root  disk  brw-rw----

I am also adding fdisk out put, I asked for a 900GB partition but its offering me only 838GB? That's a big difference. Not sure if I should post this as a separate question but why am I not able to get the 900GB I am asking for?

 s   create a new empty Sun partition table


Command (m for help): p
Disk /dev/sdc5: 913.8 GiB, 981202894848 bytes, 1916411904 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0x3aeea0a0

Command (m for help): n
Partition type
   p   primary (0 primary, 0 extended, 4 free)
   e   extended (container for logical partitions)
Select (default p): e
Partition number (1-4, default 1): 
First sector (2048-1916411903, default 2048): 
Last sector, +sectors or +size{K,M,G,T,P} (2048-1916411903, default 1916411903): +900GB

Created a new partition 1 of type 'Extended' and of size 838.2 GiB.

Command (m for help): a
  • 1
    please edit your question, paste the output of this sudo parted -l and of this lsblk -fmi – cmak.fr Jun 17 '18 at 12:00
  • 1
    900 * (1000*1000*1000) / (1024*1024*1024) = 838. – muru Jun 18 '18 at 2:22

Your Answer

By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.

Browse other questions tagged or ask your own question.