SSD Alignment Tool: Optimize SSD Performance with SSD Alignment

The advent of SSD provides another choice for operating system to reside in. People prefer placing operating system in a solid state drive to placing it in a traditional hard drive because of the advantage in read-write speed so they migrate HDD to SSD. All the operating systems before Vista including windows Xp create clusters with the criterion of 512b a unit. They can not recognize 4K sectors while the memory size of modern SSD is 4096 bytes or larger imitate 4K size. Then an abstract layer of 512b sectors is added to solve the compatible problem.

When a partition is created under windows Vista or earlier version, there is usually an indention of 63 sectors at the start. Thus SSD has to deal with misalignment issue. SSD partition alignment is important especially as a boot drive. Misalignment will increase the access times and speed which degrades the SSD performance. Unfortunately, this problem is always overlooked by SSD users. Aomei Partition Assistant can deal with this problem to restore SSD performance. If you have no idea whether your partition is correctly aligned or not you can read the following paragraph.

How to check if the partition is aligned?

First, click "Start" > "Run" and input "cmd" to invoke cmd window.


Second, in the cmd window, input "wmic partition get name,startingoffset" and press "Enter". Then you will see the startingoffset of every disk.

Check starting offset

Thirdly, input "fsutil fsinfo ntfsinfo c:" and press "Enter". Here you can change c to the partition you want to check. Then you can get "Bytes Per Cluster".


If "StartingOffset" divided by "Bytes Per Cluster" is an integer the partition is aligned correctly. If not, you have to align it with partition alignment tool.

How to achieve SSD alignment with SSD alignment tool?

The checking method has been referred above. Here partition F is the system partition in SSD which is checked misaligned. To achieve SSD alignment you can do as follow:

Download Aomei Partition Assistant Home Edition and launch it.

Step 1: Right click partition SSD; choose "Advanced" > "Partition Alignment".


Step 2: Set partition alignment to the sector (default 2048) and click "Ok" to the next step.

Set sector

Step 3: Click "Apply" to save all the changes or what you do is just in vain.

As the alternative of Partition Magic, Aomei Partition Assistant provides a series of features on management besides "Partition Alignment". The professional manager software consists of "Resize Partition", "Move Partition", "Split Partition", etc. When you create, resize or split partition you can also use the SSD alignment tool in "Advanced" feature. You can also use it to align HDD. When you use it you will find it is such versatile software.