-----Original Message-----
From: Arun Khan
Sent: 17/06/2013, 09:47
To: "GNU/Linux Users Group, Mumbai, India"
Subject: Re: [ILUG-BOM] Deleting read only partition data.
On Mon, Jun 17, 2013 at 12:08 AM, <gnulinuxist(a)gmail.com> wrote:
> Friends,
>
> With so much espionage happening in computers, I was wondering whether a read only mounted partition is read only by software only or is there an electrical lock on the hdd, which does not seem possible for multi-partition disks as another partition may be writeable.
No electrical lock. Anyone with root/sudo (with rights to mount) can
do 'mount -o remount,rw <fs_dir_tree>'
>
> Can a malicious software gain control of the electrical side of the hdd and modify or delete data, even on a read only mounted partition? For the military then, would it be better to use an entire disk as a single partition and lock it down electrically?
The 3.5" disks have pin outs, one of these pairs can be jumpered to
make the *entire* disk 'ro' - this takes care of remote root/sudo
scenarios. Anyone with physical access can easily remove the jumper
and make the *entire* disk 'rw'
--
Thanks guys for your responses and information. The recent events of US monitoring got me thinking about this remote controlled scenario.
Regards,
Rony.