1. In the Google Cloud console, go to theDisks page.

   Go to Disks

2. In the list of persistent disks in your project, click the name of thedisk that you want to resize.

3. On the disk details page, clickeditEdit. You might need toclick themore_vertMore actions menu and theneditEdit.

4. In theSize field, enter the new size for your disk. Disks with MBRpartition tables can only resize up to 2 TB.

5. ClickSave to apply your changes to the disk.

The new disk size is displayed in the list of disks.

gcloud

Use thegcloud compute disks resizecommandand specify the--size flag with the new disk size, in gibibytes (GiB).

gcloud compute disks resizeDISK_NAME \    --sizeDISK_SIZE \    --zone=ZONE

Replace the following:

• DISK_NAME: the name of the disk that you areresizing.
• DISK_SIZE: the new size, in gibibytes (GiB), forthe disk. Disks with MBR partition tables can resize only up to2 TB.

• ZONE: For zonal Persistent Disk, specify thezone where the disk is located.

  For Regional Persistent Disk, use instead the--region=REGION flag and specify the region where theregional disk is located.

Terraform

Choose one of the following options to resize either zonal disks orRegional Persistent Disk:

# Using pd-standard because it's the default for Compute Engineresource "google_compute_disk" "default" {  name = "disk-data"  type = "pd-standard"  zone = "us-west1-a"  size = "5"}

resource "google_compute_region_disk" "regiondisk" {  name                      = "region-disk-name"  snapshot                  = google_compute_snapshot.snapdisk.id  type                      = "pd-ssd"  region                    = "us-central1"  physical_block_size_bytes = 4096  size                      = 11  replica_zones = ["us-central1-a", "us-central1-f"]}

REST

To resize a Persistent Disk, construct aPOST request to thecompute.disks.resize method.

POST https://compute.googleapis.com/compute/v1/projects/PROJECT_ID/zones/ZONE/disks/DISK_NAME/resize{  "sizeGb": "DISK_SIZE"}

To resize a Regional Persistent Disk, construct aPOST request to thecompute.regionDisks.resize method.

POST https://compute.googleapis.com/compute/v1/projects/PROJECT_ID/regions/REGION/disks/DISK_NAME/resize{   "sizeGb": "DISK_SIZE"}

Replace the following:

• PROJECT_ID: your project ID.
• ZONE: For zonal Persistent Disk: the zone where thedisk is located.
• REGION: For Regional Persistent Disk: the regionwhere the disk is located.
• DISK_NAME: the name of the disk to resize.
• DISK_SIZE: the new size, in gibibytes (GiB), forthe disk. Disks with MBR partition tables can resize only up to 2 TB.

Linux VMs

1. In the Google Cloud console, go to theVM instances page.

   Go to VM instances

2. Next to the instance that has the new attached disk, click theSSHbutton. The browser opens a terminal connection to the instance.

3. Use thedf and thelsblk commands to list the size of the file systemand to find the device names for your disks.

   $sudo df -ThFilesystem      Type     Size   Used  Avail  Use%  Mounted on/dev/sda1       ext4     9.7G   1.2G   8.5G   12%  //dev/sdb        ext4     250G    60M   250G    1%  /mnt/disks/disk-1

   $sudo lsblkNAME    MAJ:MIN RM  SIZE RO TYPE MOUNTPOINTsda       8:0    0   20G  0 disk└─sda1    8:1    0   10G  0 part /sdb       8:16   0  500G  0 disk /mnt/disks/disk-1

   This example includes the following disks:

   • Boot disk: The/dev/sda1 partition is on a boot disk that hasbeen resized to 20 GB. The partition table and the file system provideonly 9.7 GB to the operating system.
   • Non-boot data disk: The/dev/sdb non-boot data disk has nopartition table, but the file system on that disk provides only 250 GBto the operating system. The mount directory for this disk is/mnt/disks/disk-1.

   Thedf command shows that the/dev/sda1 partition is mounted as theroot file system, and the/dev/sdb disk is mounted as a non-boot datadisk at/mnt/disks/disk-1. Make note of theType column, whichindicates if your disk uses anext4 orxfs file system.

4. Verify the partition type:

   sudo parted -l

   Alternatively, to see information only for a specific disk:

   sudo parted -l /dev/DEVICE_NAME

   Look for the fieldPartition Table. If the value ismsdos, thenthe disk has an MBR partition type. This means the maximum size of such adisk is 2 TB.

5. Resize the root partition and file system on the boot disk. This exampleassumes the VM image does not support automatic root partitioning andfile system resizing.

   1. Resize the root partition by usingparted. For example, thefollowing commands expand partition1 of/dev/sda to the maximumpossible size:

      1. Openparted on the/dev/sda partition:

         sudo parted /dev/sda

      2. At the(parted) prompt, enter:

         resizepart

      3. At thePartition number? prompt, enter:

         1

      4. At theWarning: Partition /dev/sda1 is being used. Are you sureyou want to continue? prompt, enter:

         Yes

      5. At theEnd? prompt, enter

         100%

      6. At the(parted) prompt, enter:

         quit

   2. Read the new partition table usingpartprobe.

      sudo partprobe /dev/sda

   3. Extend the file system:

      • If you are usingext4, use theresize2fs command:

        sudo resize2fs /dev/sda1

      • If you are usingxfs, use thexfs_growfs command:

        sudo xfs_growfs -d /

      • If you are usingbtrfs,use thebtrfs command:

        sudo btrfs filesystem resize max /

6. Resize the file system on the non-boot data disk.

   • If you are usingext4, use theresize2fs command to extend thefile system:

     sudo resize2fs /dev/DEVICE_NAME

     ReplaceDEVICE_NAME with the device name forthe disk. In this example, the device name is/dev/sdb.

   • If you are usingxfs, use thexfs_growfs command to extend thefile system:

     sudo xfs_growfsMOUNT_DIR

     ReplaceMOUNT_DIR with the mount point of the device. Youcan find the mount point listed in theMOUNTPOINT column in theoutput of thelsblk command.

   • If you are usingbtrfs,use thebtrfs command to extend the file system:

     sudo btrfs filesystem resize maxMOUNT_DIR

     ReplaceMOUNT_DIR with the mount point of the device. Youcan find the mount point listed in theMOUNTPOINT column in theoutput of thelsblk command.

7. Use thedf command to verify that the file system is extended. Forexample:

   df -h /dev/sdbFilesystem  Size  Used  Avail  Use%  Mounted on/dev/sdb    493G   70M  492G     1%  /mnt/disks/disk-1

Windows VMs

Use theWindows Disk Management utility to resize partitions on a Windows instance.

1. In the Google Cloud console, go to theVM instances page.

   Go to VM instances

2. Next to the instance that has the resized disk, click theRDP button.The browser opens an RDP connection to the instance.

3. Right-click the Windows Start button and selectDisk Management toopen the Disk Management tool.

   

4. Show the disks partition type by running in Powershell:

   Get-Disk

   In thePartition Style column, if the value isMBR then thedisk has an MBR partition type. This means themaximum size of such a disk would be 2 TB.

5. Refresh the Disk Management tool so that it recognizes the additionalspace on your zonal persistent disk. At the top of the Disk Managementwindow, clickAction and selectRefresh.

   

6. On the disk that you resized, right-click the formatted partition andselectExtend Volume.

   

7. Follow the instructions in theExtend Volume Wizard to extend yourexisting partition to include the extra disk space. If the existingpartition is formatted in NTFS, the maximum partition size islimited byits cluster size settings.

8. After you complete the wizard and the volume finishes formatting, checktheStatus column on the list of attached disks to ensure that the newdisk has aHealthy status.