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Windows 7: 100 MB Partition


23 Nov 2010   #11

ultimate 64 sp1
 
 

the plot thickens


My System SpecsSystem Spec
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23 Nov 2010   #12
Microsoft MVP

 

I haven't explored just how SysReserved places WinRe on the F8 Advanced Boot Tools menu, only that it does.

Even on a Windows 7 factory install which customizes WinRe to contain Factory Recovery, there is always a SysReserved partition in the mix.

As for MBR, referring to it being "on" a certain partition is common shorthand around here for "System Active." It is simply too complicated to explain otherwise.
My System SpecsSystem Spec
23 Nov 2010   #13
mjf

Windows 7x64 Home Premium SP1
 
 

Quote   Quote: Originally Posted by gregrocker View Post
I haven't explored just how SysReserved places WinRe on the F8 Advanced Boot Tools menu, only that it does. Even on a factory install which customizes WinRe in Windows 7 to contain Factory Recovery, there is always a 100mb SysReserved partition in the mix.

As for MBR, referring to it being on a certain partition is common shorthand around here for "System Active." It is simply too complicated to explain otherwise, although the story of how the El Torito sector got its name is pretty cool.
Greg,
you know I bite easily...... It's not complicated.
What I know about the El Torito sector was a bunch of software engineers over a class of red figuring out how to get a CD to boot.
My System SpecsSystem Spec
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23 Nov 2010   #14
Microsoft MVP

 

Mike - It really is both complicated and confusing to try to explain, far more than I wish to quote correctly when helping a dozen people a day resolve complicated boot problems. Perhaps it is enough that we fix more of these here than all the other forums (including MS's own) put together.

I like that story about how the boot sector was sketched out on a cocktail napkin at the El Torito restaurant in Silicon Valley. I imagine going there for lunch and seeing it framed on the wall.
My System SpecsSystem Spec
23 Nov 2010   #15
Microsoft MVP

Windows 7 Ultimate SP1 X64 (Windows 10, 8.1, Linux Mint, Windows XP and others in VM)
 
 

gregrocker, I only wanted to let you know that I am one of those people who refuses to have the 100MB partition. I have had three different win 7 machines with the System Reserved that caused me all kinds of grief. For some reason, the system reserved would fill up and therefore I could not do a system image or backup in control panel.

Microsoft has known that it has been a problem for numerous people but has not done anything to correct it. According to MSFT, you have to have a minimum of 40MB free space in sys res. in order to do a backup through control panel. They told me that control panel uses sys res to build a temp folder to store info for the sys image. when it gets a certain amt, it then transfers it to your backup location. but, if you do not have the 40MB backup will fail by telling you there is not sufficient space in your backup location! The correct reason is there is not sufficient space in the system reserve. I have never had a problem without the 100 MB partition. I will not deny that the sys res. has its advantages, but the disadvantages it causes me, far outweighs them.

I am not an MVP or anything close, but I have investigated this issue to the end, and am very familiar with what is happening. I know many who like it and want it and that is fine for them, just not for me.

FWIW, I am only angry with microsoft. They have known of this problem for over two years that I know of. It should be very simple for them to solve. But, they have made no attempt to try a fix. To an average person like me, the price they charge for the OS and their finicky rules about how many machines I can put it on ( for something I Bought) and them not fixing a problem that they are aware of, is inexcusable. Just my opinion.
My System SpecsSystem Spec
23 Nov 2010   #16
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

I am not a friend of the 100MB partition. But I think they have a reason to go down this route. They are preparing for EFI (an Intel developed standard to replace the BIOS). Extensible Firmware Interface - Wikipedia, the free encyclopedia
My System SpecsSystem Spec
23 Nov 2010   #17
Microsoft MVP

 

essenbe - I am familar with your issue as we deal with it here regularly. Perhaps SysReserved was written to during factory install or Dual Boot, or has been given a letter which lets some program write to it. Did yours have a letter?

Just yesterday here a Dual Boot couldn't be established using SysReserved. Unlettered SysReserved was almost full so I had OP enlarge his 100mb to 200mb and it was able to update the boot files.

MS must know about this by now.
My System SpecsSystem Spec
23 Nov 2010   #18
Microsoft MVP

Windows 7 Ultimate SP1 X64 (Windows 10, 8.1, Linux Mint, Windows XP and others in VM)
 
 

gregrocker, I can personally assure you that Microsoft is aware of the issue, as I have made such an issue with it I kept getting pushed up the ladder. They are quite aware of the issue and have done nothing to correct it. Mine did not have a letter. I can tell you my personal opinion on this issue. For some reason, by talking with others with the same pronlem one name kept popping up. Acronis. Acronis uses control panel( in fact takes over CP) for their backups. There are a few other image programs that use the 100MB partition to do their job. I think those are the culprit. I also believe from discussions that some AV programs do similar things. I guess that is their job, but it causes issues. The part I don't understand is I have helped people(with some of your tutorials here) to increase the size of the partition to as much as 350MB ( according to Microsoft I think 380 is the max). Whatever program was in there just grew with the increased size and you still could not do a system image.
My System SpecsSystem Spec
23 Nov 2010   #19
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Quote:
Just yesterday here a Dual Boot couldn't be established using SysReserved. Unlettered SysReserved was almost full so I had OP enlarge his 100mb to 200mb and it was able to update the boot files.

A while ago it was at 200MBs. I wonder why the reduced the size.
My System SpecsSystem Spec
23 Nov 2010   #20
mjf

Windows 7x64 Home Premium SP1
 
 

I heard from someone on the forum that MS reduced it from 200MB because of people complaining who wanted to run small SSD drives. Who knows???

Mine bounces around a bit but hasn't caused problems. If it does I'll make it bigger or get rid of it (the proper way).
Why don't you look inside it to see what's using what? The only thing I can see that can vary substantially is the system volume information folder.
My System SpecsSystem Spec
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 100 MB Partition




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