What is megasas?

The genuine megasas.sys file is a software component of MegaRAID Controller by LSI.
Megasas.sys is a driver for the MegaRAID SAS controller. LSI offers their MegaRAID SAS controllers for both servers and workstations, and they are fully supported in Windows. The controller hardware services RAID disk arrays in several configurations. Based in San Jose, CA, LSI was acquired by Avago in 2014. MegaRAID SAS Controllers are still sold and supported.

MegaSAS stands for MegaRAID SAS Controller Driver

Megasas.sys is a Windows driver. A driver is a small software program that allows your computer to communicate with hardware or connected devices. This means that a driver has direct access to the internals of the operating system, hardware etc. The free file information forum can help you determine if megasas.sys is a Windows system file or if it belongs to an application that you can trust.

Run a free scan to check for megasas drivers in need of updating

Megasas.sys file information

The process known as MEGASAS RAID Controller Driver for Windows (version 7 Server 2008 R2 for x64) or MEGASAS RAID Controller Driver for (version XP 32) belongs to software MEGASAS Miniport Driver for (version XP 32) or MEGASAS Storport Driver for Windows (version 7 Server 2008 R2 for x64) by LSI ( or LSI Logic (

Description: Megasas.sys is not essential for the Windows OS and causes relatively few problems. The megasas.sys file is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 20,096 bytes (50% of all occurrences) or 19,712 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. It is a Microsoft signed file. The program is not visible. There is no detailed description of this service. The file is not a Windows core file. megasas.sys appears to be a compressed file. Therefore the technical security rating is 14% dangerous.

Recommended: Identify megasas.sys related errors

Important: Some malware disguises itself as megasas.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the megasas.sys process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

There are no user opinions yet. Why not be the first to write a short comment?

Do you have additional information? Help other users!
What do you know about megasas.sys:
How would you rate it:
Link for more info:
Your Name:

Best practices for resolving megasas issues

A clean and tidy computer is the key requirement for avoiding problems with megasas. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the megasas.sys process on your computer, the following programs have proven to be helpful: ASecurity Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

megasas.sys [all]