By AOMEI / Last Updated August 2, 2019

What is Software RAID 5?

Software RAID 5 is a fault-tolerant volume that stripes data and parity across multiple dynamic disks (from 3 to 32). Parity, a calculated value that can be used to reconstruct data after a failure, is also striped across the disk array. When a disk fails, system uses the parity information to re-create the data on the failed disk.

Which operating systems support Software RAID 5?

Many users don’t understand why Windows 7 Software RAID 5 is grayed out. That’s because Software RAID 5 only can be implemented in Windows Server operating systems, including Windows 2000 Server, Windows Server 2003 and Windows Server 2008. Learn how to create Software RAID-5.

Before setting up Software RAID-5 in your Windows Server 2000/2003/2008/2011/2012, you need to be aware of the following requirements:

  • A minimum of three hard disk drives.

  • All disks involved in the Software RAID-5 volume must be converted to dynamic disks.

  • Operating system files and boot files cannot reside on the Software RAID-5 disks.

  • Never mix a hardware-RAID solution and software RAID on the same disk.

  • Software RAID-5 volumes can not be expanded with Disk Management snap-in, but you can use AOMEI Partition Assistant Server to expand RAID-5 volume.

Windows Software RAID-5 Performance

Because of fault tolerance, administrators favor using RAID-5 volumes when data integrity and data I/O speed are both important. Software RAID-5 volume provides fault tolerance at a cost of one additional disk for the volume. This means that if you use 3 x 1TB disks to create a Software RAID-5 volume, the volume will have a 2TB capacity. The remaining 1TB is used for parity.

How to Manage Windows Software RAID-5?

AOMEI Partition Assistant Server is equipped with Dynamic Disk Manager wizard, which is award-winning and full-featured software RAID management solution, allowing you to you to resize dynamic disk, extend dynamic system partition, convert dynamic disk to basic without losing data, expand RAID-5 volume, extend mirrored (RAID 1) volume, add drive to RAID 5 and remove drive from RAID 5, etc.

When there is a dynamic disk, you can run AOMEI Partition Assistant Server, click Dynamic Disk button to access the interface as the follwing screenshot for managing dynamic disks and volume.