Yes. It is not advised to directly update from vry old FW to latest FW and also it is recommended to have BIOS and iDRAC FW in sync. The upgrade path you provided looks correct. If I were in your position I would have updated iDRAC directly from 1.95 to 1.99 or 1.95 to 1.97 to 1.99 by skipping some versions in-between

As you have Lifecycle Controller firmware also in old FW I would recommend upgrading 1.6.5.12 after 1.97 and 1.7.5.4 after 2.80

For T710 latest firmware levels are below

BIOS - 6.6.0

iDRAC - 2.90

Lifecycle Controller - 1.7.5

You can download these from below link

https://www.dell.com/support/home/en-us/product-support/product/poweredge-t710/drivers 

Shine, Thank you so much for your incredibly fast response. You are awesome!

I would also like to thank you for catching that I forgot to add the Lifecycle Controller and the latest BIOS update to my list. I really dropped the ball there. Can you please look over my new list and let me know your thoughts. I also noticed that I somehow added 6.4.0 multiple times. I do not know how that happened.

BIOS 6.2.3
iDRAC 1.90
Lifecycle 1.6.0.73
BIOS 6.3.0
iDRAC 1.95
Lifecycle 1.6.5.12
BIOS 6.4.0
iDRAC 1.99
iDRAC 2.80 (Latest I see for my Service Tag)
Lifecycle 1.7.5.4
BIOS 6.5.0
BIOS 6.6.0

Thanks again.

***Edited due to a copy and paste error***

Hello Wesche,

I don't know if Shine is still online.  For a fully incremental update your list looks good.

Please let me know if there is anything else I can assist you with.

Hello,

@DELL-Shine Kwould you be able to confirm the above list? I would love Dell's blessing before I move forward.

Thank you so much for your help,

Stephen

Hello Wesche,

If you could install Windows, even temporarily, that may be your easiest route.

You could try using the single package method in the LifeCycle controller:

SingleDellPackageUpdate

On boot up press F10 to get to LifeCycle Controller

Look at video starting at 52 Seconds for steps

https://dell.to/2GCJmG7

Don't worry about references to virtual console and virtual media as you will be doing this with local keyboard/mouse.

Thank you @Dell -Charles R . Dell support has been wonderful with this process.

I noticed that the LifeCycle Controller Updates are all Windows executables. Is there any other way to install these updates? Currently Windows is not installed on these machines.

If the LifeCycle Controller Updates are critical I guess I could try livebooting into Windows or possibly temporarily install Windows onto a HDD on the machine just for the update.

I am sorry if this is a stupid question. I appreciate your patience and value your advice.

@Dell -Charles R 

Again, thank you so much for your assistance. I actually just found out we have an extra T710 not being used in a our IT graveyard. I am going to use that to test the upgrade path and see if I can do it without installing Windows. I will report back with the results.

Thank you again for your support. This is one of my first times dealing with Dell support on this type of thing and to say I am impressed is an understatement.