UEFI vs BIOS firmware

LuiLui77
LuiLui77 used Ask the Experts™
on
Hello All,

I am currently setting up a Dell server. I am now in the process of Deploying an OS utilizing the "Deploy OS" option in the life cycle controller and it let me select between UEFI and BIOS. I am aware that UEFI has a lot more options than BIOS, but I am not sure if it will work well in my situation and with the configurations that I have been task with. Some of the configurations that I have to perform are the following:

1) Harden the BIOS by securing it with a password

2) Configure 2 virtual disks (both configured with RAID 10) one for OS and second one for data. Both disks ending with 1.7 TB and 10 TB respectively after the RAID 10 configuration.

so with the requirements stated above, I am left with the questions below:

- if I decide to choose UEFI, can I harden UEFI with a password as I can do with BIOS?

- and if I decide to go with BIOS, will it support the size of my drives?

Any help will be appreciated.

Thank you!
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Business Consultant (Owner)
Most Valuable Expert 2012
Expert of the Year 2018
Commented:
- if I decide to choose UEFI, can I harden UEFI with a password as I can do with BIOS?   <-- I do so with my UEFI BIOS.

- and if I decide to go with BIOS, will it support the size of my drives?   <-- Newest BIOS supports large drives but you would have to verify with DELL Support. UEFI wold be better.
there are lots of things written about this that are pretty good: e,g,
https://phoenixts.com/blog/booting-uefi-mode/
Jackie Man IT Manager
Top Expert 2010

Commented:
one for OS and second one for data. Both disks ending with 1.7 TB and 10 TB

What is the OS?

If your OS is Windows Server 2016, select UEFI.

If your OS is Linux, select BIOS.

As long as primary virtual disk is less than 2TB, both UEFI and BIOS have no problem but you might have a problem if you select UEFI if the OS is Linux.
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Lee W, MVPTechnology and Business Process Advisor
Most Valuable Expert 2013

Commented:
UEFI is much newer and designed to replace BIOS.  It should be more secure (it supports Secure Boot) and greater disk size among other things.  If your OS permits you to use UEFI you should be using it!
kevinhsiehNetwork Engineer

Commented:
Configuring multiple virtual disks is generally not good practice, unless you have two sets of differently sized drives. If all drives are same size, you get best performance if they are all in one large RAID 10 (OBR10) and then partition it. If you create two RAID sets on the same physical disks, there are potential bugs where the RAID controller will rebuild only 1 of the 2 RAID sets.
If you go OBR10, you will need to use UEFI because you will be way past the 2 TB disk size limit for booting in BIOS.

In general, go UEFI unless your OS doesn't support it (all modern OS do).

Author

Commented:
Hello gentlemen, thank you for your comments!
JohnBusiness Consultant (Owner)
Most Valuable Expert 2012
Expert of the Year 2018

Commented:
You are welcome and I was happy to help.

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