
But please remember, you should not agree to format this disk as required unless all data saved there are of no use. This kind of situation will happen when your file system of the HDD is corrupted due to certain reasons. And you will find the disk shows as RAW when you check it in the Disk Management afterward.Īs you can see, there is no file system on disk 1. Sometimes, you may see your HDD in the Windows Explorer but when you click to open it, you’ll find the access is denied.Īs a senior user who has used computer for a long time, this situation may be not strange to you. You often have two choices when initializing a disk. Then, initialize the disk with Windows built-in tool or third-party tools. So, my suggestion is, getting back data from the uninitialized disk at first. And I believe most of you will care more about how to initialize disk without losing data. However, when your disk is not initialized anymore due to sudden change, I don’t suggest you to initialize the disk to make it usable again. If you right-click on this disk, a pop-up menu will appear and the first option on it is “ Initialize Disk”. This is exactly the same to the disk which is bought lately and you have no time to initialize it yet. Likewise, all the space of this disk is marked as unallocated.

You may see it appeared here and shown as “ Not Initialized”. When you find your external HDD is not showing up on the current computer, what are you expected to do? Actually, you may open the built-in Windows Disk Management tool and see whether it appears or not. So, when the entire disk is turned into unallocated all out of a sudden, the first thing you should do is always performing HDD recovery. Of course, you’re allowed to create a partition ( simple, spanned, striped, mirrored volume) on this disk and make it appear in Windows Explorer, but all of those actions could bring secondary damage to the original data. Indeed, an unallocated disk indicates that all of your previous partitions are lost. This is similar to an initialized disk which is brand new and includes no formatted partition.

The disk type is Basic, but all the space on that disk has been turned into unallocated now. But if you go to the Windows Disk Management under such circumstances, you’ll find it is displayed here.

When your hard disk drive suddenly becomes unallocated, you’re not able to see it in Windows Explorer.

Read More Case 1 – HDD Shows as Unallocated
