Specifications

Windows 137GB Capacity Barrier Version 1.0
22 7-Mar-2003
Regaining Capacity After-the-Fact
Often, a system is prepared and put into use before a capacity limitation is discovered. Primarily,
because most partitioning utilities, unlike DiscWizard, are unable to recognize BIOS or operating
system limitations and make appropriate suggestions. In the event that a working system is
found to have a 137GB limitation, after-the-fact, there are usually ways to add 48-bit addressing
support. In fact, several procedures noted above are after-the-fact with regards to Service Packs
and device drivers.
In most cases, DiscWizard for Windows is able to add a new partition to an existing system after
48-bit addressing support is added to the operating system. If the drive is attached to the
motherboard, DiscWizard will try to determine if the system BIOS is able to support the drive.
DiscWizard may add a DDO or suggest running DWSE if Windows blocks the BIOS test. If a
DDO is added, a blue banner box is visible after the DDO loads for a few seconds shortly before
Windows boots into graphics mode.
If the drive in question is attached to a controller, the 137GB limitation may be because the BIOS
on the card has 28-bit addressing and needs to be updated or replaced. If the BIOS on the card
is good then perhaps the device drivers are out-of-date.