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Re: Initialize / format 500 GB Momentus XT to make bootable clone

 
 
Rod Speed
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      24th Feb 2012
AndyHancock wrote
> Rod Speed <(E-Mail Removed)> wrote
>> AndyHancock wrote


>>> I believe we were discussing why it isn't such a big
>>> disaster for the clone to do its virgin boot with the source
>>> HDD still visible. Basically, the clone can be remade.


>> Yes.


>>> However, I was wondering if the process of booting
>>> the clone could lead to disk-writes to the source HDD.


>> No they dont.


>>> After all, the clone gets a drive letter other than C-drive,


>> No it doesnt. The clone gets the drive letter C


> OK, I think this is where I get lost. According to
> http://www.goodells.net/multiboot/partsigs.shtml :


> "do not let new-XP see the old-XP partition the first time
> it boots. If new-XP sees old-XP, it won't reuse the original
> drive letter when it assigns a drive letter to itself."


> I realize that this is XP whereas I'm using Windows 7,
> and I recall that you said that the article was not entirely
> accurate. Is this one of the facts that are wrong?


Yep, and its trivial to test whether its wrong or not.

>>> but its registry still contains paths to the C-drive file system


>> Yes.


>>> (which is the source HDD).


>> Nope. The clone becomes the C drive and so the registry entrys still point to the clone.


>>> Does the boot process use the paths stored in its registry in any
>>> way that could result in a write to a file in one of those paths?


>> Yes, but since the clone gets the letter C, that doesnt affect the source.


>>> This is not the same as whether the boot process writes to the
>>> registry in the source HDD,


>> That only happens if you boot the source.


>>> which is what I assumed you were talking about. For that matter,
>>> what if someone hypothetically booted off the clone and failed to
>>> notice it (not that I or anyone else would do that).


>> Then if the source is visible on the first boot of the clone, you
>> end up with a boot that is normal but you will find that if you then
>> remove the source, and boot again, you cant boot anymore because the
>> early boot phase uses files on the source which isnt there anymore,
>> so the boot fails.


>>> Would the routine use of windows cause writes to files whose paths
>>> are contained in the registry?


>> Yes.


>>> Some of those paths are paths to the C- drive.


>> Yes. But the clone is the C drive if you boot the clone, evein if
>> the source is visible to the clone on the first boot after the clone
>> has been made.



 
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Rod Speed
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      24th Feb 2012
AndyHancock wrote
> Rod Speed <(E-Mail Removed)> wrote
>> AndyHancock wrote
>>> Rod Speed <(E-Mail Removed)> wrote
>>>> AndyHancock wrote


>>>>> I believe we were discussing why it isn't such a big
>>>>> disaster for the clone to do its virgin boot with the source
>>>>> HDD still visible. Basically, the clone can be remade.


>>>> Yes.


>>>>> However, I was wondering if the process of booting
>>>>> the clone could lead to disk-writes to the source HDD.


>>>> No they dont.


>>>>> After all, the clone gets a drive letter other than C-drive,


>>>> No it doesnt. The clone gets the drive letter C


>>> OK, I think this is where I get lost. According to
>>> http://www.goodells.net/multiboot/partsigs.shtml:
>>> "do not let new-XP see the old-XP partition the first time
>>> it boots. If new-XP sees old-XP, it won't reuse the original
>>> drive letter when it assigns a drive letter to itself."
>>> I realize that this is XP whereas I'm using Windows 7,
>>> and I recall that you said that the article was not entirely
>>> accurate. Is this one of the facts that are wrong?


>> Yep, and its trivial to test whether its wrong or not.


> I know you said that it's not disastorous, but I'd rather take
> your word on that than to test it (at least not deliberately).


Its completely trivial to backup the source completely so that
you can always just restore that if it does turn out to get modified.

> Hope you understand.



 
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