Hard disk partitions are defined by a Partition Table, which is located in MBR (Master Boot Record). The table is examined for partition table entries to determine if the corresponding partition contains a valid file system that can be accessed or mounted for read/write operations. There are several ailments that can corrupt the partition table, thereby resulting into inaccessible or unusable partitions. Consequently, all the data stored in these partitions remain no longer accessible to the user. Thus, you are suggested to always maintain an updated copy of your important data to prevent the outcomes of partition table corruption. However, if you find the backup incompetent or unavailable to restore data, Windows Data Recovery utilities can help you to recover it.

For instance, you might receive the below error message when trying to access a Windows hard disk partition:

“drive_name is not accessible. The parameter is incorrect”

Where, drive_name is the name of drive, you are attempting to access, for example, D:\, H:\ etc.

Cause

This error could prominently occur due to one of the following reasons:

Partition is infected from bad sectors or disk errors Partition table is partially or completely corrupted. This could occur after you install or reinstall Windows, when Disk Administrator performs faulty calculations to write signature for logical drives in an extended partition

Solution

You should try these methods to solve the existing issue:

Open the command prompt and run chkdsk /F /R /X drive_name to isolate disk errors and bad sectors problems. You should replace drive_name with the name of partition, you are facing issues with If the above method doesn't help, repartition and reformat the entire disk to recreate the partition table information. Restore lost data from recent backup available.

At times, backup proves insufficient or invalid to give the required output. The backup might be absent too. To deal with such problems, you are recommended to use Windows Partition Recovery products that are exclusively built to restore such inaccessible or lost Windows partitions. Basically termed as Windows Disk Recovery software, these utilities bring to the users safe and comprehensive data recovery results.

Stellar Phoenix Windows Data Recovery is an unmatched recovery solution to restore damaged, lost, deleted or formatted disk partitions. It is a non-destructive Windows Partition Recovery tool with advanced features, such as Disk Cloning, Disk Imaging, S.M.A.R.T features, RAW File Recovery and more. The tool supports Windows 7 RC1, Vista, XP, 2003 and 2000 based systems.