Dell regularly release updated version of their firmware, I have created this pdf and this excel spreadsheet which you can download, but do double check the information with the Dell support site and test the firmware in your environment.
Below, I’ve written the server model with the date of the online firmware that is downloadable on the IBM site, the latest supported firmware. I intend on checking this once a month, but do check the Dell site as well:
Server model Firmware version+date Online url
PoweEdge 2950
System BIOS 2.26 - 2/21/2008
BMC Controller 2.05 A10 - 4/16/2008
SAS Backplane 1.05 A01 - 4/11/2007
SAS Controller Depends on the controller
DRAC Firmware 1.33 A00 - 4/16/2008
PowerEdge 6950
System BIOS 1.4.5 - 4/14/2008
BMC Controller 2.06 A07 - 4/16/2008
SAS Backplane 1.05 A01 - 4/11/2007
SAS Controller Various depends on controller
DRAC Firmware 1.33 A00 - 4/16/2008
M1000e
Chassis Management Contoller 1.01 A05 - 3/12/2008
PowerConnect Ethernet Switch 1.0.0.15 A07 - 1/29/2008
M600e
System firmware 1.2.2 - 3/28/2008
iDRAC firmwae 1.02 A04 - 3/6/2008
SAS backplane 1.06 A00 - 1/28/2008
SAS controller Depends on controller

