You can download BIOS Dell Update Package EXE file and use iDRAC for updating BIOS. Below link have details on same

https://www.dell.com/support/kbdoc/en-in/000134013/dell-poweredge-update-the-firmware-of-single-system-components-remotely-using-the-idrac 

Hi thanks for the link but does this work when running Solaris as the DELL support page does not list any update packages for solaris, its mainly windows or linux

thanks

Update BIOS using iDRAC is independent t of operating system. You can refer below link for more details on this. We need to use update packaged EXE file to update BIOS with iDRAC.

https://www.dell.com/support/kbdoc/en-in/000134013/dell-poweredge-update-the-firmware-of-single-system-components-remotely-using-the-idrac 

Hi Brharr1,

If your iDRAC have access to the internet your can switch from "local" to "HTTPS" as source and after entering "ftp.dell.com" as server address you will get a list of all "missing" FW updates. You can select the package of your choice and youre done.
If you dont have a iDRAC the LCC can do the same but you have to reboot your machine first.

You can download the "platform.iso" for your R730 which contains a bootable linux and it will patch all outdated FW in your server.

Or as already mentioned you can fetch the *win64.exe version of every FW package and do it manually trough the iDRAC.

If your Server have Solaris or none OS installed doesnt matter.

Regards,
Joerg

Thanks i will give the exe file a go from the IDRAC and report back

Confirming the update worked ok from the IDRAC using the win64.exe update. The Dell support site instructions I found not great and don't mention this file can be used on any OS . I went from 2.4 to 2.7 and then to the latest 2.13 with no issues.