What should we do if disk unknown not initialized windows 10? It can be shown as either Disk unknown, not initialized, no disk space or Disk unknown, not initialized, unallocated space in Windows Disk Management.įortunately, this tutorial will show you why your hard drive becomes not initialized in Disk Management and how to solve the problems you have.ģ Ways to Fix Disk Unknown Not Initialized on External Hard Drive Disk unknown not initialized issue on external hard drive? How to fix disk unknown not initialized? Fix “Disk 1 Unknown, Not Initialized” under Different Situations You may meet the problem of Disk 1 unknown, not initialized in Windows Disk Management when you try to use an external hard drive on your Windows PC.