The SD card could have registered as sda. If the OS was installed on the harddrive, this would have been sdb. You could re-enable the SD card, boot up and check the partitioning with fdisk. Look for a 2GB disk and see what disk designation it has and if it has any partitions. I don't know linux well enough to say if you can fix the boot issue after the install.
Hi , We are trying to figure out some unexpected behaviour.  On an M620 blade, we loaded RedHat.  The default System Bios settings were used....Internal SD Card ON, 1st boot device SD card. After loading RedHat, we could see all the disks, SAN storage etc and all seemed fine. Then it was decided to turn off the SD card (Integrated Devices/Internal SD Card Port/OFF) And the 1st boot device was changed to the Perc controller  When we rebooted there was "No Operating System Found". So, did we unknowingly install Redhat on to the SD card, because the default setting had it as a priority over the Perc controller? Cheers, John Bradshaw
Loading a new O/S on to an M620