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#1
03-14-05, 02:39 AM
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Say you have two files of equal size and you copy file1 over file2,
does NTFS overwrite the same sectors occupied by file2 with the contents of file1? Suppose you just make a cosmetic change to file1 without changing its size and save it. Does NTFS save it in the same sectors it previously occupied? |
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#2
03-14-05, 03:21 AM
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"Sal" <here> wrote in message
news:4230 > Say you have two files of equal size and you copy file1 over file2, > does NTFS overwrite the same sectors occupied by file2 with the > contents of file1? Suppose you just make a cosmetic change to file1 > without changing its size and save it. Does NTFS save it in the same > sectors it previously occupied? > Firstly, the storage system (NTFS in this case) does not do any writing, the operating system does the writing. If you overwrite a file with that is the same size, it will remain the same, and in the same location. If the size changes, then it will increase to filling available sectors of the filing system (always adjacent for single files). Also, there is no such thing as making a cosmetic change so to speak; if you change the file attributes in any way, you have changed the file, and it becomes different, but the location doesn't change (unless you specify a specific and different directory). |
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#3
03-14-05, 03:38 AM
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What you say is true, unless you are using the Norton Protected Recycle Bin
(maybe Executive Software Undelete also). Under this circumstance "every" file that is changed is written to a new location or else the Norton Protected Recycle Bin would not be able to restore the older versions when called upon to do so. (-: |
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#4
03-14-05, 03:51 AM
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But he isn't using (and did not say he was) Norton's PRB, so it is useless
information, unless he comes backs and makes the claim he is using NPRB. "Richard Urban" <richardurbanREMOVETHIS> wrote in message news:a580 [..] |
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#5
03-14-05, 04:26 AM
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Just pointing out an exception that applies to many people. No offense of
your knowledge intended! |
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#6
03-14-05, 08:23 AM
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Most programs work by loading a file, saving a file under a random name. Deleting the original file, renaming the saved file to the old name. But it could be memory mapping the file. Where the file becomes a sort of swap file and the memory manager looks after saving the file.
In short No. |
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#7
03-14-05, 02:14 PM
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No offense at all (the WWW doesn't offend me, nor the the corresponding
participants). If you read the OP, I wouldn't want to confuse the question further anyway, as I know you have an understanding of filing systems and OSes. "Richard Urban" <richardurbanREMOVETHIS> wrote in message news:a508 [..] |
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How does NTFS write sectors?