I am unable to boot my multi-OS computer using ubuntu.
I initially set up my computer with 1 ssd and 1 hdd. I installed ubuntu on the ssd.
Due to a software incompatability (long story), I wanted to try Centos6, so I bought a second ssd and installed Centos6 on it.
I was then able to choose which OS to use by selecting the correct hard drive in the BIOS.
This worked correctly.
I discovered that the software didn't run under Centos6 either, so I tried to downgrade to Centos5 (I know the program in question runs properly under
The installation hung.
Unfortunately, I can now longer boot under Ubuntu. The system now uses grub to boot, and I cannot just select in BIOS the ssd with ubuntu and boot from there. I unplugged the ssd containing Centos6 and tried to boot. The machine still tries to boot Centos6 (but obviously fails). From Centos6, I can still access the other directories on the ssd that I initially loaded Ubuntu on, so I think the problem is grub. Any ideas?