M, The R905 server supports up to a Perc 6/i, which doesn't support drives larger than 2TB. The only controllers that support drives larger than that are the H200 and H700, which are not supported on the R905.
Hi,  We own a Dell poweredge 905 with a perc 6/i controller. There are five 3.5" SATA slots that were filled with 1 TB Dell drives.  We tried to replace the Dell drives with 4TB WD SAS drives, but they are not recognized by the perc 6/i BIOS: leds are green + flashing amber.  The machine's BIOS version is 4.0.3 The perc 6/i's version is 1.22.02-0612. I tried to update the firmware of both by booting on FreeDOS and Linux, without success (the BIOS update utility says "unable to get the system generation"). Does anyone have experience with this combination of hardware ? Thanks M.
4TB drives on Dell PE 905