By AOMEI / Last Updated September 27, 2016

Why mirror hard drive?

For years of disk usage, your hard drive may be full of information, which leads to bad performance of your computer, and a larger disk is imperative.To solve the problem, mirroring hard drive is a good idea and choosing SSD as another storage disk rather HDD again is wise since SSD has better write\read speed. Through hard drive mirroring, you will have an identical copy of your original hard drive and there will be no functional difference between. But this is so different from backup\restore, which creates a disk image and the image backup is not accessible until restoring it. Before we start to mirror hard drive, let’s figure out how different are them!

Differences between mirror and backup

Mirror hard drive known as clone hard drive is to directly copy a disk, through the operation you will get an identical copy on the cloned drive including the operating system, the hidden directory files, even the physical location, in a word, everything on the original drive is copied identically. You can directly change the old hard drive with the freshly made one and there should no functional difference.

If you don’t need immediate accessibility, a backup is OK. Using backup utility to create a disk image refers to make a snapshot of the drive data, which creates a complete copy of the drive contents and make it a single compressed file. A good part to this, you can create multiple image backups in different time points and save them to the same disk or separate disk so as to protect data multiple times.

Having compared mirror to backup, you may easily make a choice now. Since changing a hard drive is a necessity, the straightforward way is to mirror a hard drive. If a backup for precaution is the only need, backup hard drive is fine, for this, you can refer to how to backup to external hard drive. Following we will show you how to mirror a hard drive.

How to mirror hard drive?

AOMEI Backupper Standard is a free and power software, which supports clone as well as backup. Here, we will show you how to mirror a hard drive with AOMEI Backupper, in addition you can directly mirror hard drive from GPT to MBR or from MBR to GPT.

Step 1: Download, install and launch AOMEI Backupper. Select “Disk Clone” under “Clone” tab.

Main Console

Step 2:Select the disk you want to clone as source disk (here is disk 0, a GPT disk), then click “Next”.

Select Disk

Step 3: Select destination disk you want to save your image (here is disk 1, an MBR disk) and click “Next”.

Select Destination Disk

Tip: If you clone a GPT disk to an MBR disk, you can only clone 3 partitions at most a time while using clone utility and the remaining partitions can be cloned to the destination disk by “Partition Clone” utility.

Step 4: In the next window, you can view the operation which will be executed. Here, “Edit partition on the destination disk”, “Sector by Sector clone” and “Align partition to optimize for SSD” can be set as you wish. Then, click “Start Clone”.

View Result

Step 5:Click “Finish” when the clone operation finish.


After you acheive to mirror hard drive, you can swap the old hard drive and put the new one in. Also, you can use AOMEI Backupper to do system backup, disk backup, partition backup and file backup and more.