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The drives are still functional and pass all tests. MiniTool Partition wizard shows them and the partions but the label is "*:" for both HDs.

Now neither Ubuntu nor Windows detect either hard drive. I have tested both for errors with several programs and both test out OK on all tests. Both show about the correct number of GBs.

I cannot "unhide" either using MiniTool Partition Wizard - although they show up as drives (labeled " *: ") the hide/unhide menu is grayed and cannot be selected. Same thing for attempts to split the partitions: split is grayed and cannot be selected.

The file system is "unallocated" and I can't find any way to change it to NTFS, FAT32 or anything else.

The HD's appear to be perfectly good but I cannot find any way to use them, neither for Ubuntu nor for Windows.

Something that happened during the installation or uninstall of Ubuntu rendered both HDs unrecognizable to both Ubuntu and Windows (which don't even detect them at all).

How can I correct whatever Ubuntu changed to make them recognizable to OS's again?

PS IMHO this clearly IS an Ubuntu issue: every reputable program I've ever seen has an uninstall feature. Ubuntu owes it to those who try it to make it possible for them to uninstall it if they decide to not use it.

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  • "very reputable program I've ever seen has an uninstall feature". I have never seen an "uninstall" option for Windows.
    – muru
    Aug 19 '15 at 21:07
  • Post the contents of your /etc/fstab and output of sudo blkid . that should help others to help you troubleshoot it. As for uninstall feature, Ubuntu is an operating system, and any operating system is installed to disk. It's not a simple software that you can just click "uninstall" and be done. Same with Windows or Mac OS X - they are installed to disk , so you have to repartition the disk or install different OS if you want to remove current one. It's like flashing roms on Android. It's not as simple as you think Aug 19 '15 at 22:42
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It sounds like you deleted the partition tables on the disks, which would then show "unallocated" for all their space (I'm not familiar with the tool you mentioned). The normal use of disks to to add partitions of the desired size, then format the partitions with the desired filesystem.

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