Is there a 3TB drive that can be "jumpered" or set by software to
show up as only about 2tB?

I need to use my existing stand-alone utilities and computers, which
only support 2TB drives, so software like what Seagate describes in:

http://www.seagate.com/docs/pdf/whit..._1_barrier.pdf
"Break the 2.1TB Barrier With Barracuda XT Drives and DiscWizard
Software", MB615.1-1102US, February 2011
doesn't help me.

Seagate says that none of the disks:
Barracuda XT ST33000651A
Constellation ES.2 ST33000650NS
Constellation ES.2 ST33000651NS
can be set to 2TB by jumpering or by using a program to set drive
configuration options.

I found a manual at:

http://www.seagate.com/staticfiles/s...100628615d.pdf
"Seagate Product Manual Constellation ES.2 SAS", Rev. D,
that covers the SAS version (ST33000650SS, ST33000651SS) of the
Constellation drives that I am interested in, that says that it might
be possible, with appropriate software, to do what I want with SAS
drives by using the SAS command "Mode Select (6)"
[section 4.6 "Programmable drive capacity", Page 9]

Does anyone know of any hardware to make an SAS drive behave like a
SATA drive? If such hardware existed and I could find software to use
the appropriate Mode Select command, then I could setup a system with
an SAS adapter, set the capacity of each new drive, then use it as an
SATA drive with the lower capacity that I need.

Thanks.