Converting Partition to Dynamic Disk Results in Unbootable System

Installed Windows 10 on a blank 500GB Seagate hard disk.

  • Partition 1 – 150GB Primary NTFS Windows 10
  • Partition 2 – 500MB Primary NTFS Windows 10 System Reserved

Installed Kali Linux

  • Partition 3 – 150 GB Primary ext4 Kali-Linux
  • Partition 4 – 10 GB Primary swap Kali-Linux

Remaining unpartitioned space: 190GB – I want this to serve as a data disk for both Kali and Windows 10.. To be formatted as NTFS so Windows and Kali can both see the volume. If this was formatted in ext4, Windows will not see the volume.

Booted to Windows 10, went to Administrative Tools/Computer Management/Disk Management and created a volume on the remaining 190GB partition.

A warning popped up saying that there were already four (4) primary partitions ( I think this has something to do with the old BIOS Boot of maximum 4 bootable primary partitions) and the disk would be converted to a dynamic disk and that the disk would become unbootable.

I disregarded the WARNING messaged on continued to create the volume.

RESULT: The disk became unbootable. During boot, instead of grub showing a boot menu, it showed a “grub rescue” prompt. Since only the MBR was damaged, all the files in both Windows 10 and Kali partitions were still accessible when the PC was booted with another drive and the unbootable drive was connected to it.

MIS-UNDERSTANDING OF THE WARNING: I thought I was working only on the 5th partition so I disregarded the warning. As it turned out, what the warning was saying was that since we are only allowed a maximum of 4 primary partitions, a fifth volume is only possible if the whole disk is converted into a dynamic disk, therefore overwriting the MBR. What it did was it converted all the four(4) partitions into a dynamic volume, save for Kali’s ext4 root file system.

RESOLUTION: Although I thought the MBR could somehow be fixed, I decided to copy my data files and re-format the drive, this time conscious not to exceed the four primary partition rule.

  • Partition 1 – 150GB Primary NTFS Windows 10
  • Partition 2 – 500MB Primary NTFS Windows 10 reserved (created by Win10 Installer
  • Partition 3 – 150GB Primary ext4 Kali root (slash) filesystem – manually created during Kali install
  • Partition 4 – 10GB logical Kali swap
  • Partition 5 – 190GB logical NTFS – created by Windows 10 Disk Management without the dynamic disk warning showing

Leave a comment

Your email address will not be published. Required fields are marked *