What is Native Structured Storage?

John Savill

January 8, 2000

1 Min Read
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A. Native Structured Storage or NSS was originally a new feature inWindows 2000 however it has been withdrawn due to problems with other systemcomponents.

Native Structured Storage (NSS) was a method to transparently store ActiveXdocument files in a multi-stream format on NTFS volumes. Since NSS is no longersupported Active X document files are now stored in the normal document fileformat.

Windows 2000 Beta 3 supplied a utility NSS2DOC.EXE (it is not supplied innewer beta releases) which converts NSS files to normal document file formats.This program is run automatically during upgrade and any problems logged in %systemroot%setuperr.log.

You can also run manually using:

C:> NSS2DOC-ca

Normal causes for automatic conversion failure are:

  • Files encrypted using the NTFS encrypted file system (since the account used at setup can not decrypt the files)

  • Files that cannot be written due to their security settings (run NSS2DOC as the user who owns the files to get round this problem)

  • Certain .tmp files, which are not fully flush when written and so may contain no real content

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