I'm having problems with the exec php function. When I do:

ls -al /dev/sdf1  

This doesn't found the archive (ls: cannot access /dev/sdf1: No such file or directory), but if I run this command, in console that show me the information. What can I do? That happen even running the php script as a root!!

$mountcommand = "ls -al /dev/$unit  2>&1";
exec("$mountcommand", &$mountoutput, &$mountresult);
print_r($mountoutput);
echo "\n$mountcommand\n\n";

Bu, çatallı sürecinde