> And she changed it from AHCI to compatibility mode (had to change itto > that mode to make the drive being recognized?), which is not the best > setting regarding speed. Alexander: The she is actually a he :) > Quite right, sorry, I'd read it backwards. So presumably either a bug > in the > AHCI support, or a limitation/bug of the kernel driver? > jh John: Actually, this is a complete false alarm. Actual Solution: You don't have to change anything on these laptops. But it is a good tip that when installing from external cd/dvdrom, if it first does not work, change usb port and try again. I changed back the BIOS to AHCI. I was previously plugged into the top left USB port I.e. the one on the left hand side closes to the monitor or back side. When lenovo's external CDROM/DVD is plugged into this port, I am unable to install linux in general or other OS's. Once I plug it into any of the other USB ports bottom left or right, it works perfectly. No wonder I haven't found any problem posts regarding x220 and CentOS/RHEL. Thanks for all your time supporting me. Fantastic responses on this mailing list. Use external CD/DVD ROM, just ensure to plug it into the right port :) Cheers, Janne "Janski" Nyman E: jnyman at jbtec.org