It will depend on the options used when the drives are mount
ed.
Have a look at /etc/fstab
, if the entry for the partitions in question has defaults
set as an option then this implies that suid
is set, from man mount
[1]...
defaults
Use default options: rw, suid, dev, exec, auto, nouser, and async.
You can over-ride this by specifying alternative options in /etc/fstab
, for example you can specify users
as an option (although I was caught out by the fact that this implies noexec
so I couldn't run any scripts and had to over-ride this), so have this in my /etc/fstab
:
LABEL=home /home ext4 noatime,users,exec 0 4
[1] I was reading man mount
and man fstab
yesterday after having a problem with default options myself.