[CentOS] Setting Group owner of files on USB drive

Fri May 30 20:39:36 UTC 2008
Matt Hyclak <hyclak at math.ohiou.edu>

On Fri, May 30, 2008 at 04:37:58PM -0400, Robert Moskowitz enlightened us:
> I just got a 8Gb flash drive and went to copy a bunch of files onto it.  
> I wanted to perserve everything, so I just took my archiving rsync 
> command and altered it to go to localhost:/media/RALLY2/ (name of flash 
> drive).  I am getting errors with changing the group owner.  Huh?
> So I try to just use mkdir to create a directory on the flash drive.  
> The directory has a group of root ???
> So I try a chgrp and get:
> [root at mine me]# chgrp me /media/RALLY2/Stuff
> chgrp: changing group of `/media/RALLY2/Stuff': Operation not permitted
> OK why can't I set the group to something other than root?
> ls -lstr /media/
> total 4
> 4 drwxr-xr-x 3 me root 4096 May 30 16:28 RALLY2
> and of course for /media:
> 8 drwxr-xr-x   3 root root  4096 May 30 16:18 media

Most likely the device is formatted as FAT32, which has no concept of

Reformat it, ignore the errors, or modify your rsync command to not preserve


Matt Hyclak
Department of Mathematics 
Department of Social Work
Ohio University
(740) 593-1263