How to fix 'Drive not accessible, the parameter is incorrect' in Windows 10/8/7/XP and recover lost data?

Updated by Admin to RAW Drive Recovery & Data Recovery on January 14th, 2020

My external hard drive does not display properly in my computer. When I try to click it, it freezes and the message appears "Drive is not accessible, parameters are incorrect". I don't know what happened to the drive, but I really want to keep the files inside it. Is there anything else I can do to recover data from inaccessible drive and fix drive not accessible parameter incorrect error?

Drive is not accessible, the parameter is incorrect

It occurs frequently that you receive the error message "Drive is not accessible, parameters are incorrect" when trying to open a drive. This error can not only happen on on external hard drive, but also on hard drive, USB drive, flash drive, SD card, memory card or any other storage device.

When you encounter this error, you can't access data inside the drive without formatting. However, formatting the drive will erase the data. Don't worry! This article will offer you the solution to fix this error and help you to recover lost data.

Why does "drive not accessible, the parameter is incorrect" error occcur?

When encountering drive not accessible parameter incorrect error, you may get very upset and don't know what happened to your drive. Actually, the parameter incorrect error can be caused by the damaged file system, bad sectors or other errors on the disk, unsafe ejection, sudden power outage, virus attack, etc. Figuring out the possible causes of this error can be helpful to fix this error as well as recover lost data.

How to fix 'Drive not accessible, the parameter is incorrect' error?

The partition table, the storage capacity, the read-write access time, and the hard disk's performance, etc. are determined by the various parameters, so once those parameters are incorrect due to some reasons, your drive is not accessible. To fix the inaccessible drive, please try the solutions:

1. Uninstall or update the old disk driver

This solution works efficiently if you meet this disk inaccessible problem after a recent Windows update.

If the external hard drive is not accessible, the first thing you can check is to check the connections which include USB port, USB cable, and the driver. Here is how.

Step 1: Connect this external hard drive to your computer with another USB port, USB cable, or even another computer. This will exclude the possibility of malfunctioned hardware.

Step 2: Open the Start menu, type "devmgmt.msc" in the search box and hit Enter.

Step 3: Open Device Manager and expand Disk drives.

Step 4: Find your external hard drive, right-click on it, and then choose Update Driver Software….

Step 5: If there is an update, you can follow the instructions to update the disk driver.

Step 6: Restart your Windows computer and then see if this external hard drive is accessible by your computer.

2. Change the drive letter and path

When the drive is not inaccessible on Windows computer, you can repair this inaccessible drive by changing its drive letter in Disk Management. This operation will try to reload the file system of your drive drive as well as repair some minor disk errors.

Step 1: Right-click This PC or My Computer on the desktop and choose Manage.

Step 2: Click on Disk Management in the left sidebar.

Step 3: Locate your inaccessible drive and right-click on it.

Step 4: Choose Change Drive Letter and Paths….

3. Use chkdsk command to fix the parameter incorrect error

Chkdsk (short for check disk) is a system tool in Windows OS, it verifies the file system integrity of a volume and fixes logical errors in the file system.

Step 1: Go to Windows start menu, type CMD in the search bar.

Step 2: Right click cmd.exe from the search results and choose Run as Administrator.

command prompt

Step 3: Type chkdsk X: /f (Replace X with the drive letter of the inaccessible drive) in the command window and press Enter.

Once the inaccessible drive is fixed, the parameter incorrect will disappear and all the data will be got back. Sometimes, chkdsk fails to fix the inaccessible drive and then reports: "The type of the file system is RAW. Chkdsk is not available for RAW drives", in this situation, you have to try following solution to recover lost data.

4. Fix the inaccessible drive by a data recovery software

Luckily, M3 Data Recovery is released to fix "Drive not accessible, the parameter is incorrect" issue, it is a professional data recovery software which provides RAW drive recovery module to fix inaccessible drive (Convert RAW file system to NTFS without formatting?) and Data Recovery module to recover data from inaccessible drive under Windows 10/8/7/Vista/XP and Windows Server 2016/2012/2008/2003.

Step 1: Download, install and launch M3 Data Recovery on your computer.

Step 2: After launching M3 Data Recovery, please choose RAW Drive Recovery module, select the inaccessible drive and click Next to continue.

Inaccessible drive repair software

Step 3: M3 Data Recovery is checking and rebuilding the corrupted file system information.

Rebuild file system on inaccessible drive

Step 4: Check the files in the inaccessible drive before fixing it.

Fix drive not accessible, parameter incorrect issue

Step 5: Click "Fix Drive" to fix the inaccessible drive and get data back.

5. Fix the parameter incorrect error by data recovery

Step 1: Download, install and launch M3 Data Recovery on your computer.

Free data recovery software

Step 2: After launching M3 Data Recovery, please choose Data Recovery module, select the inaccessible drive and click Next to continue.

Scan data from inaccessible drive

If the inaccessible drive is Bitlocker encrypted, M3 Data Recovery provides Bitlocker Recovery module to recover data from inaccessible Bitlocker encrypted drive.

If the inaccessible drive is encrypted by other software, you need to unlock this drive and then recover lost data from the inaccessible drive.

Step 3: Check the found files from the inaccessible drive and preview them.

Recover data from inaccessibl drive

Step 4: Choose the files you expect and then start data recovery process.

Step 5: After data recovery from the inaccessible drive is successfully done, you can reformat the inaccessible drive to NTFS/FAT32/exFAT file system with Windows built-in format tool, disk management or third party tool, this drive will be working again after the format completes.

6. Fix the parameter incorrect error by reformatting

Besides, you can fix the parameter incorrect error by refomatting the inaccessible drive with the following steps:

Step 1: Go to This PC or My Computer, find the inaccessible drive.

Step 2: Right-click the inaccessible drive and choose Format.

Step 3: Set up format information as NTFS, FAT32 or exFAT, allocation unit size, volume label and format options (the default format option is Quick Format).

If you want to make your external hard drive compatible with macOS and Windows, format it into exFAT/FAT32 because you can't write to NTFS drives on macOS.

Step 4: Click Start and the format operation will finish within minutes.

7. Ask for help from a local data recovery professional

If the inaccessible drive has hardware issue or lost data is not found by M3 Data Recovery, please send the inaccessible drive to a local data recovery professional for help.

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