In this case, you need to fix/rebuild MBR and recover the deleted/lost partition.Īfter knowing the above methods, it is time to fix disk unknown not initialized issue with the following solutions: Option 1: Initialize disk If this uninitialized disk shows disk capacity, it means your Windows OS has recognized this uninitialized disk, but the partition is lost/deleted or MBR is corrupted due to some reasons. How to fix 'disk unknown not initialized, unallocated space'?įirstly open Windows Disk Management and find the uninitialized disk. Windows Disk Management shows an error: disk unknown not initialized on the hard disk, external hard drive, USB drive, flash drive, SD card, etc, the disk may show 'unallocated space' or no disk space in Disk Management, so you are not able to access data stored on this uninitialized disk, which makes you very upset and don't know how to solve this issue and recover data. Disk 1 unknown, not initialized, I/O device error. Disk 1 unknown, not initialized, unallocated space in Disk Managementģ. Disk 1 unknown, not initialized, no size or no disk space. Three disk unknown not initialized situationsġ.

I don't want to lose any data, it contains all my family photos, please help. Checked disk management where it shows disk as 'Unknown' and 'Not initialized'. I have WD external hard disk connected via USB and it does not get detected in Windows explorer. Updated by Tim to Data Recovery Tips on April 28th, 2021