I have a Windows 10 and Ubuntu 14.04 dual boot system. I am a novice at Ubuntu but managed to get the dual boot up and running reliably. I am now trying to add a 3TB HD and partition it for use by ubuntu. When I start gparted I get the following error:
Libarted Warning: /dev/sdc contains GPT signatures, indicating that it has a
GPT table. However, it does not have a valid fake msdos partition table, as it
should. Perhaps it was corrupted -- possibly by a program that doesn't
understand GPT partition tables. Or perhaps you deleted the GPT table, and are
now using an msdos partition table. Is this a GPT partition table?
When I open a terminal window and start sudo gdisk for the same drive /dev/sdb I get:
Type device filename, or press <Enter> to exit: /dev/sdb
Partition table scan:
MBR: MBR only
BSD: not present
APM: not present
GPT: not present
***************************************************************
Found invalid GPT and valid MBR; converting MBR to GPT format
in memory. THIS OPERATION IS POTENTIALLY DESTRUCTIVE! Exit by
typing 'q' if you don't want to convert your MBR partitions
to GPT format!
***************************************************************
I have been looking at "GPT partition table warning message during install of ubuntu" but it doesn't appear to be an exact match for my system and I have so far been too cowardly to do anything but quit. All I really want to do is get the new drive online so I have some room to start making virtualbox VMs without trashing my existing dual boot set up. I got enough out of previous link to make me concerned that if I messed up I will trash my windows 10 partition. Any suggestions?
For now I'm gonna go make backups of both my windows 10 and ubuntu partitions. Thanks
