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Knowledge Base

Creating a new virtual disk for an existing Linux virtual machine (1003940)

Last Updated: 7/19/2021Categories: TroubleshootingTotal Views: 210651Language:
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Learn how VMware Skyline Advisor and Skyline Health Diagnostics work together to provide proactive intelligence and self-service log analysis.

Use Skyline Advisor to avoid issues before they occur across VCF, vSphere, vSAN, NSX, vROps & Horizon. Skyline Findings are based on top KBs, VMSAs/CVEs and design best practices.

Use Skyline Health Diagnostics to root cause vSphere & vSAN logs when an issue occurs. Skyline Health Diagnostic Findings are based on top KBs and VMSA/CVEs. You can use the Skyline Health Diagnostics tool in online or offline mode.

If you require additional help from technical support, please use Skyline Advisor to initiate a Log Assist to reduce time to upload logs. TSEs can also initiate logs to reduce effort.

Details

This article provides steps to create a new virtual disk for an existing Linux virtual machine.

Solution

Note: This article assumes some degree of familiarity with Linux system administration skills

For a full description of the utilities mentioned in this article, see the Linux documentation.

Note: The preceding link was correct as of May 19, 2015. If you find the link is broken, please provide feedback and a VMware employee will update the link.

To create a new virtual disk for an existing Linux virtual machine:

Log in as root on your Linux virtual machine.

Run this command and make note of the sdx entries

ls /dev/sd*

Log in to the vCenter Server using the vSphere Client.

In the vSphere Client inventory, right-click the virtual machine and select Edit Settings.

Click the Hardware tab and click Add.

Select Hard Disk and click Next.

Complete the wizard.

Reboot the Linux virtual machine.

Log in using the root credentials.

Running the command ls /dev/sd* will now return a new entry.

Create one partition on new disk, example to sdx:                                                                                                                                                                                                            fdisk /dev/sdx
Command (m for help): p
Command (m for help): n
Command action
e  extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-22400, default 1): <RETURN>
Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-22800, default 22800): 22400

Command (m for help): w
The partition table has been altered !

Create an ext3 file system on the new disk partition created on step 11.

mkfs -t ext3 /dev/sdx1

Caution: Ensure you have selected the right device, there is no undo.

Run the fdisk command to verify the existence of the new disk partition you created:

fdisk -l

Run this command to create a mount point for the new disk partition:

mkdir /New_Directory_Name

Run this command to display the current content of /etc/fstab:

cat /etc/fstab

Using a text editor, edit fstab and add this line to add the disk partition to /etc/fstab so that it is available across reboots:

/dev/sdx1 /New_Directory_Name ext3 defaults 1 3

Note: Use a Linux text editor of your choice.

Restart the Linux virtual machine and the new disk partition is now available.

Additional Information

For translated versions of this article, see:

日本語: 既存の Linux 仮想マシンの新しい仮想ディスクを作成する (2096926)

简体中文: 为现有 Linux 虚拟机创建新虚拟磁盘 (2097341)

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