hi Hayne,

here is the result:

Last login: Tue Nov 17 08:21:40 on console
2:~ genis$ sudo chmod +x /Volumes/Gen

WARNING: Improper use of the sudo command could lead to data loss
or the deletion of important system files. Please double-check your
typing when using sudo. Type "man sudo" for more information.

To proceed, enter your password, or type Ctrl-C to abort.

Password:
chmod: Unable to change file mode on /Volumes/Gen: Operation not permitted
2:~ genis$

i add a password for my imac and do the sudo command again.

please advise.

thanks

You cannot use the sudo command with a blank password. You must set and Admin password.

hi Las-Vegas,

thank you for your answer.

but i already set my new password in system preference-->account.

but it seems i cannot type anything when the terminal ask me to enter my password.(just like in my result i paste here, nothing was displayed after "password")

i do not know why.
please kindly advise if anything wrong.

thank you

Genis

That's normal - nothing is shown in Terminal when you enter a password - this is for security reasons.

So it seems that the 'sudo chmod' command ran, but you still got "Operation not permitted".
I think this must be due to the ACLs that are present on the parent (/Volumes) folder.

Maybe someone who has Snow Leopard (10.6) will chime in here to tell us what the correct ACLs for the "/Volumes" folder should be.

hi Hayne,

anyother method i can try now?
i am so worry about my external drive.

kindly help. please...

thanks

Genis

Oh - I must have been tired when I looked at these results before - I didn't notice the 'uchg' flag on the Gen folder.
That is probably what is causing the problem.
So let's remove it (it is a "locked" flag).

Run the following commands as usual via copy & paste and show us the results:


sudo chflags nouchg /Volumes/Gen
ls -aOle /Volumes
echo "done"

Hi Hayne,

result:

128:~ genis$ sudo chflags nouchg /Volumes/Gen
Password:
128:~ genis$

the lock next to the external drive "Gen" is removed.

please indicate the next step!

thank you

Genis

Hi Hayne,

i am able to change the permission and access right after the removal of the lock beside.

everything back to normal now!
i am so excite and really really thank you for your kindly and patient help!!!!!!!!!!!!!!!!!!!!

you save my world!
welcome to email me genis.cheung@yahoo.com when you are visiting Hong Kong. i owe you a big meal!

and thank you to Las_Vegas too.
you guys are awesome!

thanks again

Genis

The next step is to try again to add "execute" permission to that folder:


sudo chmod +x /Volumes/Gen
ls -aOle /Volumes
echo "done"

hi hayne,

if my external drive is able to be accessed right now, should i keep entering the command?

thank you again!

Genis

No - I posted that (post #29) in response to your "what is the next step?" in post #27.