Removing write protect from a seagate hard drive

[JD]

On 11/20/2012 11:54 PM, Jens Neu wrote:
> On Wed, 21 Nov 2012 06:29:44 +0100, users-bounces at lists.fedoraproject.org wrote:
>> Is there a system util to use to issue
>> a command to a hard drive to remove
>> write protect?
> What kind of write protect do you mean? I have never heard from a software write protect in common hard disks. I've seen quite a lot IDE Compact Flash "disks" that have hardware switches for this but not PATA or SATA hdds
> -jens
There has to be some sort of hard drive state that sets the drive into 
read-only
mode. When I try to mount the drive rw, the error message is that the 
drive is
read only.
Since I try to mount it as root, and /dev/sdd1 has mode 600, permission 
is not
the issue. So, it has to be a disk internal hardware state.