Detaching an EVS Disk from a FlexusX Instance Online

Updated on 2025-01-09 GMT+08:00

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Scenarios

If a file system on your system disk is damaged and your FlexusX instance cannot be started, you can detach the system disk and attach it to another FlexusX instance as a data disk. After the file system is fixed, you can attach the disk back to the original FlexusX instance as the system disk.
If you want to move a data disk from one FlexusX instance to another in the same region and AZ, you can detach the data disk and then attach it to that FlexusX instance.
If you no longer need an EVS disk, you can detach and delete it.

Billing

A detached EVS disk will not be automatically deleted, and it will still be billed. To avoid unintended charges, you can delete or unsubscribe from the disk if it is no longer needed.

Constraints

A system disk can only be detached offline. You can only detach the system disk when its FlexusX instance is in the Stopped state.
After the system disk is detached from a FlexusX instance, the following operations cannot be performed: starting the instance, remote login, resetting the password, changing instance specifications, changing the OS, reinstalling the OS, creating images, creating backups, adding disks, and changing the security group.

Prerequisites

Before detaching an EVS disk from a running Linux FlexusX instance, you must log in to the instance and use umount to cancel the association between the disk and the file system. Also, make sure that there are no programs reading data from or writing data to the disk. Otherwise, you will not be able to detach the disk.

Procedure

Log in to the FlexusX console, in the upper left corner, click , and select a region.
Click the name of the FlexusX instance you want to detach a disk from.
The details page of this instance is displayed.
Click the Disks tab. Locate the target disk and click Detach.