Re: Explanation For Failed Grub Installation
Does the laptop use Intel SRT? That is sort of combination of hdd + ssd as fast cache disk. They are sort of joined together, and partitioning it will not produce the same results as a single disk.
Another possibility is that the kubuntu partition was created with some error. Partitioning tools usually display blank disk (without any partitions) if there is error in the partition table. Deleting that partition made the error go away, so everything worked again.
And if you create the linux partition as logical, not primary, you can have more than 4. The logical partitions on the disk must be next to each other, and in that case one extended partition is created that holds them like a container. The disk can have 3 primary + 1 extended partitions. But having separate /boot is not needed, especially if that /boot is not close to the start of the disk. It is useful only in special cases and most often when close to the start. In 99% of cases you don't need it as separate partition.
The weird partitioning result and the grub failure could point to Intel SRT since in that case the hdd+ssd are in a sort of fakeraid.
Darko.
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Ubuntu 18.04 LTS 64bit
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