How to confirm that the data disk has been unmounted and a custom image can be created

The content of this article is about how to confirm that the data disk has been uninstalled and that you can create a new custom image. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

Custom Image FAQ

How to view the data disk?

You can use the df command to check the usage of the data disk and the location where the file system is mounted. For example: df –lh

You can obtain the partition status of the data disk through the fdisk command. For example: fdisk -l

#How to uninstall and delete the data in the disk table?

Assuming that /dev/hda5 is already mounted on /mnt/hda5, you can use any of the following commands to unmount the mounted file system:

umount /dev/hda5
umount /mnt/hda5
umount /dev/hda5 /mnt/hda5

/ etc/fstab is an important configuration file under the Linux system. It contains detailed information about the file systems and storage devices mounted by the system at startup.

When you do not want to mount the specified partition when starting the instance, you need to delete the corresponding statement line in the current file. For example, deleting the following statement can disconnect xvdb1 at startup:

/dev/xvdb1 /leejd ext4 defaults 0 0

How to confirm that the data disk has been unmounted and a custom mirror can be created?

Confirm that the corresponding automatic mounting data disk partition statement line in the /etc/fstab file has been deleted.

Use the mount command to view the mounting information of all devices, and confirm that the execution results do not contain the corresponding data disk partition information.

After the instance is released, does the custom image still exist?

exist.

After the instance is released, does the snapshot still exist?

Keep manual snapshots, automatic snapshots will be cleared when the instance is released. For more details, see the Auto-Snapshot FAQ.

After the instance used to create a custom image expires or the data is released, will the created custom image be affected? Are instances provisioned using custom images affected?

are not affected.

Can the operating system of an instance created using a custom image be replaced? Can the original custom image still be used after replacing the system?

Can. The original custom image can continue to be used after replacement.

When replacing the system disk, select another operating system. Can I use a custom image?

Can.

Note: After the system disk is replaced with a custom image, the original data will be completely overwritten.

Can the created custom image be used to replace the system disk data of another cloud server ECS?

Can. However, it should be noted that the custom image will overwrite all data on the server's system disk. Please refer to Creating an ECS Instance Using an Image.

Is it possible to upgrade the CPU, memory, bandwidth, hard disk, etc. of the cloud server ECS activated with a custom image?

can be upgraded.

Can I use custom images across regions?

Can't. Custom images can only be used in the same region. For example: Custom images created in instances in the East China 1 region cannot be used to activate cloud server ECS in the North China 1 region.

If you need to use a custom image across regions, you can do so by copying the image. See Copying the Image.

Can custom images of subscription instances be used to create pay-as-you-go cloud server ECS?

Can. The custom image function does not distinguish the payment method of the instance, that is, it does not distinguish whether it is a yearly or monthly subscription or pay-as-you-go.

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