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‎.openpublishing.redirection.json

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

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---
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title: Resize an OS disk with a GPT partition | Microsoft Docs
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description: This article provides instructions on resizing an OS Disk with GPT Partition.
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services: virtual-machines-linux
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documentationcenter: ''
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author: kailashmsft
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manager: dcscontentpm
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editor: ''
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tags: ''
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ms.service: security
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ms.topic: troubleshooting
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ms.workload: infrastructure-services
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ms.devlang: azurecli
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ms.date: 05/03/2020
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ms.author: kaib
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ms.custom: seodec18
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---
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# Resize an OS Disk with a GPT Partition
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> [!NOTE]
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> This scenario applies only to OS Disk with a GPT Partition.
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This article describes how to increase the size of the OS Disk with a GPT partition in Linux.
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## Identify whether the OS Disk has an MBR or GPT Partition
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Use the **parted** command to identify if the disk partition has been created with either a master boot record (MBR) partition, or a GUID Partition Table (GPT) partition.
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### MBR partition
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In the following output, the **Partition Table** shows a value of **msdos**, identifying an **MBR** Partition.
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```
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[user@myvm ~]# 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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[user@myvm ~]#
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```
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### GPT partition
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In the following output, the **Partition Table** shows a value of **gpt**, identifying a GPT partition.
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```
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[user@myvm ~]# 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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If your virtual machine (VM) has a GPT Partition on your OS disk, increase the size of the OS Disk.
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## Increase the size of the OS Disk
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The following instructions apply to Linux-endorsed distributions.
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> [!NOTE]
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> Before you proceed further, make a backup copy of your VM, or take a snapshot of your OS Disk.
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### Ubuntu 16.x and 18.x
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To increase the size of the OS Disk in Ubuntu 16.x and 18.x:
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1. Stop the VM.
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1. Increase the size of the OSDisk from the portal.
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1. Restart the VM, then log into the VM as a **root** user.
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1. The OSDisk will now display an increased file system size.
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As shown in the following example, the OS Disk has been resized from the portal to 100 GB, as the **/dev/sda1** file system mounted on **/** now displays 97 GB.
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```
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user@myvm:~# 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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user@myvm:~#
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```
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### SUSE 12 SP4,SUSE SLES 12 for SAP, SUSE SLES 15, and SUSE SLES 15 for SAP
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To increase the size of the OS Disk in SUSE 12 SP4, SUSE SLES 15, and SUSE SLES 15 for SAP:
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1. Stop the VM.
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1. Increase the size of the OSDisk from the portal.
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1. Restart the VM.
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When the VM has restarted, perform the following steps:
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1. Access your VM as a **root user** using the following command:
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`#sudo su`
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1. Use the following command to install the **gptfdisk** package, which is required for increasing the size of the OS Disk:
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`#zypper install gptfdisk -y`
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1. To view the largest sector available on the disk, run the following command:
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`#sgdisk -e /dev/sda`
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1. Resize the partition without deleting it using the following command. The **parted** command has an option named **resizepart** to resize the partition without deleting it. The number 4 after resizepart indicates resizing the fourth (4th) partition.
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`#parted -s /dev/sda "resizepart 4 -1" quit`
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1. Run the `#lsblk` command to check whether the partition has been increased.
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The following output shows that the **/dev/sda4** partition has been resized to 98.5 GB.
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```
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user@myvm:~ # 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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└─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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```
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1. Identify the type of file system on the OSDisk using the following command:
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`blkid`
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Example output:
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```
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#blkid
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user@myvm:~ # 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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```
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1. Based on the file system type, use the appropriate commands to resize the file system.
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For **xfs**, use the following command:
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` #xfs_growfs /`
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Example output:
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```
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user@myvm:~ # 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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```
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For **ext4**, use the following command:
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```#resize2fs /dev/sda4```
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1. Verify the increased file system size for **df -Th**, using the following command:
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`#df -Th`
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Example output:
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```
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user@myvm:~ # 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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user@myvm:~ #
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```
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As shown in the preceding example, we can see the file system size for the OSDisk has been increased.
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### RHEL 7.x with LVM
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1. Stop the VM.
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1. Increase the size of the OSDisk from the portal.
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1. Start the VM.
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When the VM has restarted, perform the following steps:
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1. Access your VM as a **root user** using the following command:
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`#sudo su`
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1. Install the **gptfdisk** package, which is required to increase the size of the OS Disk.
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`#yum install gdisk -y`
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1. To see the largest sector available on the disk, run the following command:
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`#sgdisk -e /dev/sda`
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1. Resize the partition without deleting it using the following command. The **parted** command has an option named **resizepart** to resize the partition without deleting it. The number 4 after resizepart indicates resizing the fourth (4th) partition.
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`#parted -s /dev/sda "resizepart 4 -1" quit`
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1. Run the following command to verify that the partition has been increased:
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`#lsblk`
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The following output shows that the **/dev/sda4** partition has been resized to 99 GB.
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```
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[user@myvm ~]# 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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```
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1. Use the following command to resize the **physical volume (PV)**:
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`#pvresize /dev/sda4`
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The following output shows that the PV has been resized to 99.02 GB.
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```
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[user@myvm ~]# 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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[user@myvm ~]# 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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```
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1. In the following example, `/dev/mapper/rootvg-rootlv` is being resized from 2GB to 12GB (an increase of 10GB) using the following command, which will also resize the file system:
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`#lvresize -r -L +10G /dev/mapper/rootvg-rootlv`
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Example output:
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```
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[user@myvm ~]# 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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```
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1. Verify whether `/dev/mapper/rootvg-rootlv` has increased the file system size or not using the following command:
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`#df -Th /`
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Example output:
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```
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[user@myvm ~]# 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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[user@myvm ~]#
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```
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> [!NOTE]
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> To use the same procedure to resize any other logical volume, change the **lv** name in step 7
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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 with a GPT partition
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href: resize-os-disk-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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