I am trying to replace the original 2Gb IBM drive with a 40Gb Toshiba. Everytime I put the 40 in the bios won't recognise it. So I've called Dell to see how large a drive Bios A13 will see. They won't help unless I use paid support due to the products age... I am able to boot up fine with 2Gb drive in it and can change boot order in Bios, set it to CD. I can boot from CD and have used several different boot disks all with no problem. Now I want to flash Bios to A16 - to see if it will recognise the larger drive. Only downside is I HAVE to have the original HDD in it when I do it. I have cloned it onto the 40 but I'm worried about something going wrong with the flash since I can only flash from HD, or CD. I definately do not want to risk disrupting the ONLY disk I know will run in this machine ! My last attempt was to pull the HD caddy out and on boot up I get a "Primary hard disk drive 0 not found No bootable device(s) selected strike F1 to retry boot, F2 for setup utility" This error occurs no matter what order I use in setup and no matter which boot cd I use. I can only boot from cd with the 2Gb drive in it. Any other methods I may have missed or Keystrokes ??