All Documents
Current Document

Recommend

Container Engine Virtual Private Cloud Standard Storage Service

Found 0 result in total

Content is empty

If you don't find the content you expect, please try another search term

Documentation

Elastic Block Storage (EBS)

View more results
Document title with current keyword not found
Directory
Expand AllFold All Up
No products found with this keyword
Documentation Elastic Block Storage (EBS) User Guide Resize partitions and file systems(Linux) Overview

Overview

Last updated：2021-07-01 14:35:08

Scenarios

EBS volumes are scalable storage devices. You can expand the capacity of an existing EBS volume at any time to increase its storage space without affecting the data on the EBS volume. After you expand the capacity of an EBS volume in the EBS console, you need to allocate the expanded capacity to partitions. The partitions can be existing partitions or partitions that are newly created and formatted. Then, resize the file systems of the partitions, so that the expanded capacity can be recognized. For more information, see Resize partitions and file systems (Linux).

Note:
The maximum capacity of an EBS volume that uses MBR partitioning is 2 TB. If the capacity exceeds this limit, the excess capacity cannot be used. You may need to expand the capacity of an EBS volume that uses MBR partitioning to more than 2 TB. In this case, we recommend that you create and attach a data disk that uses GPT partitioning and then copy the data to the new disk. To prevent data loss caused by misoperations, we recommend that you create a snapshot to back up data before you expand the capacity of an EBS volume.

View the partition information about an EBS volume

  1. Log in to the KEC instance. For more information, see Connect to instances.
  2. Run the following command to view the information about the EBS volumes attached to the KEC instance: 
    fdisk -l
    For example, the operating system of the KEC instance is CentOS 6.5 and the EBS volumes use both MBR partitioning and GPT partitioning. The following figure shows the results.
    image.png The following table describes the information extracted from the figure.    		 EBS volume Partition Partition description
    /dev/vda is the system disk with a capacity of 50 GB. /dev/vda1 MBR partition, with a capacity of 50 GB
    /dev/vdb is the data disk with a capacity of 2,200 GB. /dev/vdb1 GPT partition, with a capacity of 200 GB
For example, the operating system of the KEC instance is CentOS 7.6 and the data disks do not have partitions. The following figure shows the results.
image.png The following table describes the information extracted from the figure.		 EBS volume Partition Partition description
/dev/vda is the system disk with a capacity of 50 GB. /dev/vda1 MBR partition, with a capacity of 50 GB
/dev/vdb is the data disk with a capacity of 200 GB. None Raw disk, with no partitions
/dev/vdc is the data disk with a capacity of 2,500 GB. None Raw disk, with no partitions
For example, the operating system of the KEC instance is CentOS 7.6 and the EBS volumes use both MBR partitioning and GPT partitioning. The following figure shows the results.
image.png The following table describes the information extracted from the figure.		 EBS volume Partition Partition description
/dev/vda is the system disk with a capacity of 50 GB. /dev/vda1 MBR partition, with a capacity of 50 GB
/dev/vdb is the data disk with a capacity of 200 GB. /dev/vdb1 MBR partition, with a capacity of 50 GB
/dev/vdc is the data disk with a capacity of 2,500 GB. /dev/vdc1 GPT partition, with a capacity of 50 GB
For example, the operating system of the KEC instance is CentOS 8.2 and the EBS volumes use both MBR partitioning and GPT partitioning. The following figure shows the results. image.png The following table describes the information extracted from the figure. EBS volume Partition Partition description
/dev/vda is the system disk with a capacity of 70 GB. /dev/vda1 MBR partition, with a capacity of 50 GB
/dev/vdb is the data disk with a capacity of 100 GB. /dev/vdb1 MBR partition, with a capacity of 50 GB
/dev/vdc is the data disk with a capacity of 150 GB. /dev/vdc1 GPT partition, with a capacity of 50 GB

Resizing methods

Scenario
 Partition type
 Resizing method
A raw data disk has no partition but a file system. None Resize file systems on a raw disk
An EBS volume uses MBR partitioning and has file systems. You want to allocate the expanded capacity of the EBS volume to existing MBR partitions. MBR Allocate the expanded capacity to existing MBR partitions
An EBS volume uses MBR partitioning and has file systems. You want to allocate the expanded capacity of the EBS volume to newly created and formatted MBR partitions. MBR Allocate the expanded capacity to newly created and formatted MBR partitions
An EBS volume uses GPT partitioning and has file systems. You want to allocate the expanded capacity of the EBS volume to existing GPT partitions. GPT Allocate the expanded capacity to existing GPT partitions
An EBS volume uses GPT partitioning and has file systems. You want to allocate the expanded capacity of the EBS volume to newly created and formatted GPT partitions. GPT Allocate the expanded capacity to newly created and formatted GPT partitions
On this page
Previous:Resize partitions and file systems(Linux)
Next:Resize MBR partitions and file systems (< 2 TB)
Pure ModeNormal Mode

Pure Mode

Click to preview the document content in full screen
Feedback