\System Volume Information\ Access Denied

[j22]

This is my first use of 7-zip.  Using the command line, it scans and then compresses the contents of My Pictures.  At the conclusion of compression, an error message displays

Warnings for files
\System Volume Information\ : Access is denied:
WARNING: Cannot find 1 file

A file is created in C:\  labeled cd.7z which is approximately the same size as the contents of My Pictures.  The destination target archive is empty.

Can I get some help please to point me in the right direction?  I have searched this 7-zip forum.  There are others who have had this problem but I can't find a solution listed.  As it stands now, 7z isn't working.

Thank you for any assistance.
J22

[Vacon]

Hello everyone,

without knowing your command-line, it's hard to say something…
At first glance I would say, your command-line tries to compress your whole drive C:\, because \System Volume Information\ resides in root of a drive, and I can't imagine that is your intension.
Try to put 7z.exe into your path and change into the directory you want to compress. Then try again without any absolute path (avoid the leading C:\).
And please show us your command-line if it doesn't bother you.

Best regards!

[j22]

The command line is -
C:\> 7z  a  cd /d "F:\archive.7z" -r "C:\documents and settings\john\my documents\my pictures\"

The path statement is -
%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;C:\Program Files\QuickTime\QTSystem\;c:\windows;c:\program files\unlocker\;c:\windows\nircmd.exe;c:\program files\utilities\zip\;c:\program files\utilities\7-zip\

This is a WinXP system.  As I stated prior, the command begins to work when executed from the C:> prompt, first doing a scan, then compressing the contents of My Pictures.  When it's finished compressing, the error statement above shows on screen.  There may be a statement about 1 file missing while the compression is running, but it takes 1+ hour to run so I don't sit and watch the screen.  Can't find any error or log file that might identify a file it can't find.  It creates the cd.7z file and just stops.

Thanks, J22

[j22]

Addition info - I believe I was incorrect in stating 7-zip stopped and did not work.  I now believe it is working as I did the list command on the cd.7z file (mentioned in earlier post).  List shows, in round numbers, 8.3GB of data compressed to 7.3GB.

1) Can you tell me why it is not writing to the specified destination file on the F: drive?
2) Is this level of compression typical of image files (about 40% .avi and 60% .jpeg)?  The compression level is set at default normal.  I was expecting more.

Thanks much!
j22

[Igor Pavlov]

7z  a  "F:\archive.7z" "C:\documents and settings\john\my documents\my
pictures\"