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‎articles/virtual-machines/linux/resize-os-disk-having-gpt-partition.md

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---
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title: Resize OS Disk having GPT Partition.
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description: This article provides instructions to resize the OS Disk having GPT Partition.
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author: kailashmsft
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ms.service: security
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ms.topic: article
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ms.author: kaib
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ms.date: 05/03/2020
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ms.custom: seodec18
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---
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# Resize OS Disk having GPT Partition.
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**This scenario applies only for OS Disk having GPT Partition.**
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This article describes how to increase the OS Disk having GPT partition in linux.
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## How to identify if OS Disk is having GPT (or) GPT Partition.
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There are many ways in which you can Identify if the Disk is partitioned using MBR (or) GPT partitions.
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**parted** command is used to identify if the disk partition has been created using MBR (or) GPT partition.
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Example for **MBR** Partition:
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```
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[root@rhel6 ~]# parted -l /dev/sda
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Model: Msft Virtual Disk (scsi)
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Disk /dev/sda: 107GB
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Sector size (logical/physical): 512B/512B
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Partition Table: msdos
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Number Start End Size Type File system Flags
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1 1049kB 525MB 524MB primary ext4 boot
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2 525MB 34.4GB 33.8GB primary ext4
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[root@rhel6 ~]#
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```
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In the above output, we have to look for "Partition Table".
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We could see that the value is **msdos**, which means the disk is having "MBR" Partition.
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Example for **GPT** Partition.
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```
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[root@rhel7lvm ~]# parted -l /dev/sda
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Model: Msft Virtual Disk (scsi)
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Disk /dev/sda: 68.7GB
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Sector size (logical/physical): 512B/512B
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Partition Table: gpt
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Disk Flags:
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Number Start End Size File system Name Flags
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1 1049kB 525MB 524MB fat16 EFI System Partition boot
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2 525MB 1050MB 524MB xfs
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3 1050MB 1052MB 2097kB bios_grub
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4 1052MB 68.7GB 67.7GB lvm
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```
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In the above output, we have to look for "Partition Table".
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We could see that the value is **gpt**, which means the disk is having "GPT" partition.
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After validating your VM is having GPT Partition On OS Disk,
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Proceed forward for increasing the OS Disk.
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## Environment
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- Linux Endorsed distributions
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## Procedure
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>[!NOTE]
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>Please a take a backup of the VM (or) snapshot of OS Disk before procedding further.
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### Ubuntu 16.x && 18.x
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1. Stop the VM.
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2. Increase the size of the OSDisk from the portal.
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3. Start the VM && Login to the VM && become a **root** user.
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4. The OSDisk will have increased file system size.
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Here the OS Disk is resized to 100 GB from portal.
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```
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root@ubuntu:~# df -Th
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Filesystem Type Size Used Avail Use% Mounted on
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udev devtmpfs 314M 0 314M 0% /dev
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tmpfs tmpfs 65M 2.3M 63M 4% /run
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/dev/sda1 ext4 97G 1.8G 95G 2% /
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tmpfs tmpfs 324M 0 324M 0% /dev/shm
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tmpfs tmpfs 5.0M 0 5.0M 0% /run/lock
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tmpfs tmpfs 324M 0 324M 0% /sys/fs/cgroup
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/dev/sda15 vfat 105M 3.6M 101M 4% /boot/efi
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/dev/sdb1 ext4 20G 44M 19G 1% /mnt
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tmpfs tmpfs 65M 0 65M 0% /run/user/1000
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root@ubuntu1604:~#
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```
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From the above output, we could see that "/dev/sda1 mounted on /" is having 97 GB now.
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### SUSE 12 SP4 && SUSE SLES 15 && SUSE SLES 15 For SAP
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1. Stop the VM.
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2. Increase the size of the OSDisk from the portal.
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3. Start the VM.
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4. Perform the below steps to increase the size of the OS Disk.
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4.1 Access your VM and become root user using below command.
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#sudo su -
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4.2 Install the "gptfdisk" package, which is required for increasing the OS Disk.
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#zypper install gptfdisk -y
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4.3 To be able to see the largest sector available on the disk, run the below command.
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#sgdisk -e /dev/sda
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4.4 Resize the partition without deleting it, using below command.
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Parted has an option named "resizepart" to resize the partition without deleting it.
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The number 4 after resizepart, means resize the 4TH partition.
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#parted -s /dev/sda "resizepart 4 -1" quit
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4.5 Check using below command if the partition is increased.
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#lsblk
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susesels15serialconsole:~ # lsblk
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NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
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sda 8:0 0 100G 0 disk
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├─sda1 8:1 0 2M 0 part
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├─sda2 8:2 0 512M 0 part /boot/efi
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├─sda3 8:3 0 1G 0 part /boot
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└─sda4 8:4 0 98.5G 0 part /
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sdb 8:16 0 20G 0 disk
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└─sdb1 8:17 0 20G 0 part /mnt/resource
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From the above output we could see that "/dev/sda4 partition is now having 98.5 GB.
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4.6 Identify the type of file system on the OSDisk using "blkid" command
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#blkid
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susesels15serialconsole:~ # blkid
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/dev/sda1: PARTLABEL="p.legacy" PARTUUID="0122fd4c-0069-4a45-bfd4-98b97ccb6e8c"
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/dev/sda2: SEC_TYPE="msdos" LABEL_FATBOOT="EFI" LABEL="EFI" UUID="00A9-D170" TYPE="vfat" PARTLABEL="p.UEFI" PARTUUID="abac3cd8-949b-4e83-81b1-9636493388c7"
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/dev/sda3: LABEL="BOOT" UUID="aa2492db-f9ed-4f5a-822a-1233c06d57cc" TYPE="xfs" PARTLABEL="p.lxboot" PARTUUID="dfb36c61-b15f-4505-8e06-552cf1589cf7"
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/dev/sda4: LABEL="ROOT" UUID="26104965-251c-4e8d-b069-5f5323d2a9ba" TYPE="xfs" PARTLABEL="p.lxroot" PARTUUID="50fecee0-f22b-4406-94c3-622507e2dbce"
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/dev/sdb1: UUID="95239fce-ca97-4f03-a077-4e291588afc9" TYPE="ext4" PARTUUID="953afef3-01"
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4.7 Based on the file system type use the appropriate commands to resize the file system.
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For xfs:
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#xfs_growfs /
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susesels15serialconsole:~ # xfs_growfs /
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meta-data=/dev/sda4 isize=512 agcount=4, agsize=1867583 blks
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= sectsz=512 attr=2, projid32bit=1
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= crc=1 finobt=1 spinodes=0 rmapbt=0
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= reflink=0
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data = bsize=4096 blocks=7470331, imaxpct=25
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= sunit=0 swidth=0 blks
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naming =version 2 bsize=4096 ascii-ci=0 ftype=1
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log =internal bsize=4096 blocks=3647, version=2
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= sectsz=512 sunit=0 blks, lazy-count=1
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realtime =none extsz=4096 blocks=0, rtextents=0
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data blocks changed from 7470331 to 25820172
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For ext4
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#resize2fs /dev/sda4
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4.8 Verify the increased file system size "df -Th"
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#df -Th
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susesels15serialconsole:~ # df -Th
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Filesystem Type Size Used Avail Use% Mounted on
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devtmpfs devtmpfs 306M 4.0K 306M 1% /dev
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tmpfs tmpfs 320M 0 320M 0% /dev/shm
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tmpfs tmpfs 320M 8.8M 311M 3% /run
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tmpfs tmpfs 320M 0 320M 0% /sys/fs/cgroup
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/dev/sda4 xfs 99G 1.8G 97G 2% /
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/dev/sda3 xfs 1014M 88M 927M 9% /boot
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/dev/sda2 vfat 512M 1.1M 511M 1% /boot/efi
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/dev/sdb1 ext4 20G 45M 19G 1% /mnt/resource
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tmpfs tmpfs 64M 0 64M 0% /run/user/1000
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susesels15serialconsole:~ #
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We can see the increased the file system size for the OSDisk
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### RHEL 7.x with LVM
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1. Stop the VM.
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2. Increase the size of the OSDisk from the portal.
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3. Start the VM.
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4. Perform the below steps to increase the size of the OS Disk.
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4.1 Access your VM and become root user using below command.
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#sudo su -
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4.2 Install the "gptfdisk" package, which is required for increasing the OS Disk.
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#yum install gdisk -y
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4.3 To be able to see the largest sector available on the disk, run the below command.
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#sgdisk -e /dev/sda
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4.4 Resize the partition without deleting it, using below command.
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Parted has an option named "resizepart" to resize the partition without deleting it.
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The number 4 after resize part, means resize the 4TH partition.
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#parted -s /dev/sda "resizepart 4 -1" quit
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4.5 Check using below command if the partition is increased.
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#lsblk
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[root@rhel7lvm ~]# lsblk
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NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
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fd0 2:0 1 4K 0 disk
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sda 8:0 0 100G 0 disk
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├─sda1 8:1 0 500M 0 part /boot/efi
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├─sda2 8:2 0 500M 0 part /boot
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├─sda3 8:3 0 2M 0 part
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└─sda4 8:4 0 99G 0 part
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├─rootvg-tmplv 253:0 0 2G 0 lvm /tmp
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├─rootvg-usrlv 253:1 0 10G 0 lvm /usr
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├─rootvg-optlv 253:2 0 2G 0 lvm /opt
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├─rootvg-homelv 253:3 0 1G 0 lvm /home
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├─rootvg-varlv 253:4 0 8G 0 lvm /var
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└─rootvg-rootlv 253:5 0 2G 0 lvm /
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sdb 8:16 0 50G 0 disk
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└─sdb1 8:17 0 50G 0 part /mnt/resource
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From the above output we could see that "/dev/sda4 partition is now having 98.5 GB.
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4.7 use the below command to resize the Physical Volume (pv)
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#pvresize /dev/sda4
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[root@rhel7lvm ~]# pvresize /dev/sda4
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Physical volume "/dev/sda4" changed
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1 physical volume(s) resized or updated / 0 physical volume(s) not resized
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[root@rhel7lvm ~]# pvs
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PV VG Fmt Attr PSize PFree
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/dev/sda4 rootvg lvm2 a-- <99.02g <74.02g
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From the above output we could see that the PV is resized to 99.02 GB.
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4.8 In this case, we are resizing the /dev/mapper/rootvg-rootlv by 10 GB using the below command, which would also resize the file system.
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#lvresize -r -L +10G /dev/mapper/rootvg-rootlv
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[root@rhel7lvm ~]# lvresize -r -L +10G /dev/mapper/rootvg-rootlv
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Size of logical volume rootvg/rootlv changed from 2.00 GiB (512 extents) to 12.00 GiB (3072 extents).
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Logical volume rootvg/rootlv successfully resized.
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meta-data=/dev/mapper/rootvg-rootlv isize=512 agcount=4, agsize=131072 blks
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= sectsz=4096 attr=2, projid32bit=1
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= crc=1 finobt=0 spinodes=0
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data = bsize=4096 blocks=524288, imaxpct=25
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= sunit=0 swidth=0 blks
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naming =version 2 bsize=4096 ascii-ci=0 ftype=1
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log =internal bsize=4096 blocks=2560, version=2
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= sectsz=4096 sunit=1 blks, lazy-count=1
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realtime =none extsz=4096 blocks=0, rtextents=0
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data blocks changed from 524288 to 3145728
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4.9 Verify whether the /dev/mapper/rootvg-rootlv has increased file system or not using below command.
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#df -Th /
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[root@rhel7lvm ~]# df -Th /
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Filesystem Type Size Used Avail Use% Mounted on
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/dev/mapper/rootvg-rootlv xfs 12G 71M 12G 1% /
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[root@rhel7lvm ~]#
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>[!NOTE]
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>we can use the same procedure to resize any other logical volume.
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>We just need to change the lv name in the step 4.8
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## Next Steps
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- [Resize Disk](expand-disks.md)

‎articles/virtual-machines/linux/toc.yml

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href: disks-shared-enable.md
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- name: Upload a vhd to a disk - CLI
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href: disks-upload-vhd-to-managed-disk-cli.md
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- name: Resize OS Disk having GPT Partition
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href: resize-os-disk-having-gpt-partition.md
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- name: Resize a disk
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href: expand-disks.md
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- name: Use Storage Explorer to manage disks

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