Recently I experienced a case: “I installed an old HDD that had separated partitions and I can’t access the second partition. Why my hard disk partition is not showing? I was reading I should assign the drive a letter in diskmgmt, but it won’t let me, it’s just greyed out, the only option is to delete the partition(which I don’t want to do)”. Then I searched the solution online, and finally solved it. Today, I will write a post for this topic in some different cases. Hope you also can solve your problem when disk partition is not accessed.
As you know, disk partition is an important part of a hard drive, with it, data can be saved to. In Windows Explorer, double click one partition, and then you can access the data on it. However, sometimes you can’t access partition on hard drive. What happened? Generally speaking, it is caused by ten factors, partition is missing, drive letter is lost, partition is hidden, partition becomes RAW, the parameter is incorrect, access is denied and more. Here I will introduce the details to you in three aspects.
When opening Windows Disk Management or Windows Explorer, if you can’t find the partition on the target disk, it is possible the partition gets missing. It shows “unallocated” in Disk Management. If some important data are saved on this partition, what should you do? Don’t be panic, MiniTool Partition Wizard – a professional partition manager provides a feature “Partition Recovery” feature to help you to recover lost or deleted partitions as well as data effectively.
After finishing partition recovery, the partition doesn’t have a drive letter, so you need to assign a drive letter for this partition with “Change Letter” feature by MiniTool Partition Wizard.
Sometimes you choose to hide a partition with a large amount of personal information to prevent others from accessing. Then this partition is unable to be accessed in Windows Explorer. If you use Disk Management to change the drive letter, you will fail to fix this issue. In this case, you also can ask MiniTool Partition Wizard for help to unhide this partition. Just right click the target partition and then select “Unhide Partition” feature to solve Windows can’t access the disk issue.
In addition, if your partition doesn’t have a drive letter, you still can’t access it. So please open Disk Management, then right click this drive to select “Change Drive Letter and Paths” to assign a drive letter for the selected partition.
Besides, there are other seven situations, click this post 10 Situations Where We Can’t Access a Partition in Windows, Along with Solutions to learn much. When encountering can’t access partition on hard drive issue, just try these solutions to fix it.