If you choose MBR (Master Boot Record) partition style to initialize the disk, you may get an error: The system cannot find the file specified. Then Disk Management will prompt "you must initialize a disk before Logical Disk Manager can access it". However, sometimes, the hard drive might be displayed as errors like Unknown, Not Initialized, 0 bytes, read-only. Generally, when a hard drive is plugged properly, it shows in Disk Management. This error happens to Disk Management when it fails to initialize a disk or convert a disk to GPT. Virtual Disk Manager: The specified disk is not convertible because the size is less than the minimum size required for GPT disks. However, if you change partition table style from MBR to GPT for system disk, you may encounter booting issue provided that the version of Windows on your computer cannot recognize GPT partition style. The conversion does not delete existing partitions and files, and you can continue accessing these partitions in Windows as before. Step 4: Click Save All button to make the conversion take effect. Step 3: Click OK to confirm operations to be done. Step 2: Select the MBR disk you wish to convert and click Disk > Convert To GUID Partition Table item. Then connect the hard drive you want to convert to GPT to computer. Step 1: Download, install and launch DiskGenius Free Edition on your computer. Now follow steps below to convert MBR to GPT and fix the virtual disk service error. When the disk is converted to GPT, you will get the message saying DiskPart successfully converted the select disk to GPT format.ĭiskGenius Free edition is a free and great partition manager by which you can convert a MBR disk to GPT without affecting existing data, and vice versa. Select disk # (replace # with the disk number you want to focus)Ĭlean (This command will delete all partitions and files on the selected disk)Ĭonvert GPT (type convert MBR if you want to convert disk to MBR) Step 3: Type following commands one by one and hit Enter key after each command. Step 2: Type diskpart in Command Prompt and press Enter key. Type CMD in searching box and choose Run as administrator item. Step 1: Launch an elevated Command Prompt. Hence, before trying following steps, back up any files that are important to you. One thing to be noted is that the converting process will use "clean" command which removes all partitions or volumes on selected disk. Solution 1: Convert disk to MBR/GPT with DiskPartįollow instructions below to convert a disk to MBR or GPT. Windows is running on the disk: Users are not allowed to make changes to the hard drive where Windows is running on, for example, change partition table style, delete or format system partition. Delete existing partitions and you will be able to convert disk to MBR or GPT successfully. The disk you want to convert contains partitions: If there is a partition left on the disk, the converting will fail with errors shown in the picture above. The error appears in Command Prompt when DiskPart command fails to convert selected disk to GPT or MBR. CDROMs and DVDs are examples of disks that are not convertible. Virtual disk Service error: The specified disk is not convertible.
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