Aste88, If you follow this link it will show the previous versions back to 1.0.4. What I HIGHLY recommend you do is walk it up to current, with the iDrac if you haven't already, as you don't want them to get too far apart. I would suggest downloading and running the ones marked Urgent, as well as not jumping more than like 3 updates at a time.  
Hi, I recently bought a  used dell R610 and used the iso tu successfully update everything BUT the BIOS. The installer program works fine (launched from the contos ISO produced by drm) but on reboot I get a "BIOS update failed" message. I understand from other threads It might be caused by how old the current BIOS is. Is there any way to get an intermediate version that might work? The oldest available is 6.10 and fails just like 6.6.0 Thanks Edit: verion info 2.0.11
Cannot update R610 BIOS from 2.0.11 to 6.x