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BIOS and UEFI Explained


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15 replies to this topic

#1
Dahaka

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Many (less experienced) users will like this video.


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#2
Al

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I always change my PCs to use legacy support for hard drives. UEFI is probably fine but causes the hard drive to be formatted as FAT32, which only allows 4GB files. I have many over that limit, including some custom install.wim files and most video files.


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#3
Dahaka

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I'm not sure you understood the message in the video. One of the main points of using UEFI is to take advantage of using HDDs with more than 2TB storage space. However, the setup of Windows creates a small FAT32 partition of 100MB for System files, an NTFS "recovery" partition of 450MB (in my case), another smaller 16MB partition and the rest of the available space goes to the Windows partition, which is automatically set as NTFS.

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#4
Uncle

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I'm not sure you understood the message in the video. One of the main points of using UEFI is to take advantage of using HDDs with more than 2TB storage space. However, the setup of Windows creates a small FAT 32 partition of 100MB for System files, an NTFS "recovery" partition of 450MB (in my case), another smaller 16MB partition and the rest of the available space goes to the Windows partition, which is automatically set as NTFS.

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Good answer. Was wondering if i was losing my memory. "legacy support for hard drives." to me still means older product support. So am I a legacy member. ;)


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#5
Al

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Dahaka, I stand corrected. Thank you.


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#6
Al

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Note that with UEFI, you cannot install from an ISO or DVD if your install.wim is greater than 4GB. Due to the application of update .CABs and combining x86 & x64 into the .WIM and not compressing it into and .ESD, many of my installs have install.wims greater than 4GB. That's why I use the "legacy" method.


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#7
Dahaka

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Note that with UEFI, you cannot install from an ISO or DVD if your install.wim is greater than 4GB. Due to the application of update .CABs and combining x86 & x64 into the .WIM and not compressing it into and .ESD, many of my installs have install.wims greater than 4GB. That's why I use the "legacy" method.

 

Well now, if you're tinkering with ISO files and making your customized setups that's something else - you should know what you're doing or know what to expect. Whenever I describe solutions or present cases I consider one of the Windows flavors with its original ISO. But still, you can try putting that setup on a USB drive with Rufus.

 

As a curiosity, what is it exactly that the customized WIM contains as an extra in your case? Why "not compressing"?



#8
Al

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Well in order to remove anything you don't want, such as Russian language, you have to convert the ESD to a WIM and then do the removal. Often when you have a WIM it may exceed the 4GB limit. I've also noticed that when I use and ESD with an autounattend.xml, the install will fail. It appears that an autounattend.xml needs to work with a WIM. So I always use a WIM and if I fiddle with it or not, it may (and often does) exceed 4GB. So to make things very simple, I do not use UEFI. If I use UEFI I have the 4GB limit, if I do not 4GB, bigger or smaller, is not an issue.


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#9
Snuffy

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Note that with UEFI, you cannot install from an ISO or DVD if your install.wim is greater than 4GB. Due to the application of update .CABs and combining x86 & x64 into the .WIM and not compressing it into and .ESD, many of my installs have install.wims greater than 4GB. That's why I use the "legacy" method.

That is why you should be using .swms

because i do UEFI and have some that are well over 4GB.  so your excuse for doing "Legacy" is IMHO poor excuse.

Most OEMs use .swms. also, when you make a Factory USB Restore.


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#10
Al

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Well, first the earth cooled, then the dinosaurs came. Then there was dirt, and then there was legacy. Guess I'm old fashioned.


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#11
Snuffy

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Well UEFI scared me also, but once you get use to it. has (IMHO) bennies over Legacy.

and Remember Windows 7 will also Install in UEFI.  and it was for me a new learning experience to learn .SWM

then I could Modify OEM Factory USBs.


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#12
Al

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Thank you Snuffy, I know all about UEFI and .SWMs. Don't really want a work-around so I can UEFI, I just prefer not to use it.


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#13
dave

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Thank you Snuffy, I know all about UEFI and .SWMs. Don't really want a work-around so I can UEFI, I just prefer not to use it.

I share your preference.  ;) 

 

I spent too much time undoing what UEFI enabled & GPT partitioning did when testing macOS in real machine on my HP. Not worth the headaches for me. I'll keep the UEFI for VMs thank you very much. At least for the time being.


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#14
Dahaka

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OK, you can choose not to use it, but it may become the mandatory standard one day. What then? :mrgreen:


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#15
Al

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Snuffy, why is this such an issue for you? I gave my reasons for my choice. Remember, everyone gets wet in a pissing match.

 

I believe this issue is closed, I will not longer post in this subject.


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#16
Snuffy

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Most of the NEW OEMs are set to UEFI.  and have REMOVED the Ability to use "Legacy".

and that my Friend is why I took the time to LEARN UEFI and how to INSTALL Windows 7 and up

on UEFI. and yes i know the USB needs to be Fat32. and SWM allow me to do all this.

That is WHY this is an ISSUE.  sooner or later you will need to know. 

Like I have 2 OEM USBs 16GB  that I have for expediance of SPEED, since USB is much faster than DVDs.

and when you have more than 1 or 2 Computers in a Clients to do "I prefer to do this as FAST as Possible"

so the use of "UEFI and .swms" is for me the only way to go.


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