NTFS alternate stream in compressed archive?

Does any of the major compressed archive formats in Windows (e.g. zip, rar, 7z) support NTFS alternate data stream?

netvope

Posted 2010-06-26T05:43:04.763

Reputation: 4 505

If you don't mind me asking: Why do you need this? It's almost unheard of to require keeping ADS, simply because it's so rare. – afrazier – 2010-12-17T14:02:59.880

Answers

RAR is the only one that does right now, AFAIK.

From the command line, you would use the -os switch

-os     Save NTFS streams. Windows version only.

        This switch has meaning only for NTFS file system and allows
        to save alternative data streams associated with a file.
        It is especially important in Windows 2000, XP and newer,
        which use streams to keep some file dependent information
        like file descriptions. If you use RAR to backup your
        NTFS disks, it is recommended to specify this switch.

I'm not sure how the ability is surfaced in WinRAR's GUI, if at all.

afrazier

Posted 2010-06-26T05:43:04.763

Reputation: 21 316

It is in the GUI when you go to create an archive under the "Advanced" tab, in the "NTFS options" frame, along with the checkbox to save NTFS permissions information.

LionsPhil

Posted 2010-06-26T05:43:04.763

Reputation: 51