Thanks Laura, The four-digit masks did the trick, but I don't understand why 3-digits work ok for fat but not for ntfs. I'm sure I read somewhere that a missing first digit should default to zero anyway. I'm even more confused because the sense of the last three digits is the inverse of the required permissions, but the first digit is not inverse.
To summarise for the benefit of anyone else who wants to change the default permissions for vfat and ntfs partitions: /dev/hda1 /mnt/winC vfat uid=1000,gid=1000,dmask=007,fmask=117 0 0 ... allows owner and group to navigate, create & delete directories; and read & write, but not execute files. /dev/hda6 /mnt/winE ntfs uid=1000,gid=1000,dmask=0227,fmask=0337 0 0 ... allows owner and group to navigate directories and read, but not write or execute files. For those even newer than me - the uid and gid values might be different on your system, and may be found in '/etc/passwd' and '/etc/group. Kevin -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]