You can detach a data disk from an ECS instance if the billing method of the data disk is pay-as-you-go. You cannot detach a data disk which is used as a local disk.
Prerequisites
Ensure that you have performed the following operations before detaching a disk:
- The cloud disk has been attached to an instance and its Status is In Use.
- To ensure data integrity, we recommend that you stop reading or writing file systems of the data disk to avoid data loss before you detach the data disk.
- If file systems have been attached to the data disk, you must connect to the ECS instance
and detach the data disk or partitions from the operating system, as shown in the
following table.
Operating system Detach a data disk or partition Linux Run the umount [Data disk partition]command such asumount /dev/vdb1.If you have written the partition attachment information to the /etc/fstab file, delete the partition attachment information. Otherwise, you cannot connect to the instance after the instance is restarted.
Windows Server In the Disk Management dialog box, right-click the disk name such as Disk 2 and select Offline.
Background information
You can detach a data disk in the ECS console in the following ways:
- Detach a cloud disk on the Instance Details page. if you want to detach one or more disks from an instance.
- Detach a data disk on the Disks page if you know which disk you want to detach.
Detach a cloud disk on the Instance Details page.
Note You can repeat the preceding procedure to detach multiple data disks.
When the Status becomes Unattached, it indicates that the data disk has been detached.
Detach a data disk on the Disks page
When the Status becomes Unattached, it indicates that the data disk has been detached.