Originally posted by: sentmemail
i just want to confirm that winXP can use a 300GB hdd right?
You bet, but you need SP1(a) for 48 bit addressing
Plus latest IntelAppAcc if Intel chipset - Intel chipsets do not natively support 48bit
Taken from WD site;
"Whether or not a given system can support 48-bit addressing (drives over 137GB) is dependent upon several factors. The operating system must support the higher capacities. Windows 98 and higher will support the drives at the operating system level. However, since motherboards and BIOSs vary widely,"Whether or not a given system can support 48-bit addressing (drives over 137GB) is dependent upon several factors.
Systems which do not support the full capacity of these drives, will generally report the capacity only up to the 137 GB limit. Any capacity above this limit will neither be recognized nor displayed. If your system is capable of supporting the full capacity of your drive, it should be properly displayed in either the CMOS set-up or during Power On Self Test (POST) prior to booting.
The motherboard BIOS, the EIDE controller, and the EIDE controller drivers you are using within your operating system must support the drives as well. It is best to contact your motherboard manufacturer to determine if your motherboard, BIOS, and EIDE controller drivers support drives over 137GB.
Another possibility is the use of an add-on EIDE controller that supports 48-bit addressing. We sell PCI EIDE controllers made by our Technology Partner, Promise Technology, on our online store.
===============
You must double check 48LBA is enabled in registry
[48bitlba.Add.Reg]
HKLM,"System\CurrentControlSet\Services\Atapi\Parameters","EnableBigLba",0x10001,1
(
http://fae.abit.com.tw/download/utilities/48bit-lba/48bitLba.inf)
-----------Initially, Hitachi's 180GB Deskstar 180GXP drive would not run on our Windows XP Pro-equipped Dell Dimension 8200 test system, although the same PC had no difficulty with Maxtor drives up to 300GB. The problem, we learned, stemmed from differences in how companies implement the new 48-bit addressing standard for recognizing drives over 137.4GB; we solved it by updating Intel's Application Accelerator driver to a version that jibed with Hitachi's implementation. Depending on your setup, drives over 137.4GB may work flawlessly or they may require you to update drivers, the BIOS, the operating system, or all three. And you may still have problems with older motherboard chip sets.
==========================
If you bios doesnt support it, you will need an overlay program that spoofs 48 bit support during bootupfrom HDD manuf website.
=========================
Abbreviations and Acronyms
http://www.seagate.com/support/kb/disc/tp/137gb.pdf
See Appendix B.
Overview
The Windows 137GB Capacity Barrier is also known as 48-bit Logical Block Addressing Support
for ATA (IDE), Serial ATA or ATAPI disc drives. The 137GB limitation does not affect SCSI
interface disc drives.
In order to properly access the full capacity of an ATA interface hard drive larger than 137GB,
your system must meet the system requirements described below. There are three general
methods of support:
1) Operating System Solutions for Windows XP and Windows 2000
2) Ultra ATA/133 PCI Controller Card for Windows XP, 2000, Me, 98SE and NT 4.x
3) Intel Chipset Solutions for Windows Me, 98SE and NT 4.x (partial)
Warning: Formatting an ATA interface drive past the 137GB on a system that does not
meet all requirements will result in data loss.
1) Operating System Solutions for Windows XP and 2000
The only current Windows operating systems that natively support the full capacity of ATA drives
larger than 137GB are:
Windows XP Home Service Pack 1 (SP1) or higher
Windows XP Professional SP1 or higher
Windows 2000 Professional SP3 or higher
Windows 2000 Server SP3 or higher
The original Windows XP (RTM or Release to Manufacturing) and previous Windows
Once you have installed the latest Service Pack, you can install the Windows version of
DiscWizard to properly partition and format the remaining full capacity of the drive.
If you are adding this drive as additional storage to an existing Windows system, you can install
the drive with the Windows version of DiscWizard. First verify that the correct versions of
Windows and Service Packs are installed before partitioning to insure support for the full capacity
of the drive. This includes any controller card drivers if utilized.
Alternatively, BIOS support for ATA>137GB can also be accomplished by putting the necessary
boot code on the disc drive itself. This small bit of programming emulates the BIOS support so
that when the higher-level operating system drivers begin to launch they can "see" the full
potential capacity of the drive. Seagate provides hard disc installation software called DiscWizard
to help with this task. DiscWizard writes boot code called a DDO on discs that do not have native
BIOS support for the full capacity of the drive. DiscWizard only writes the DDO when required.
Note: It is a common misconception that the DDO is some kind of memory resident program or
that it has the potential to slow disc access by being in memory. Like all BIOS routines, the
DDO is discarded from memory after about 5 seconds into the launch of the operating
system when the 32-bit direct access device drivers take over. The DDO exists only to
detect and then present the full capacity of the disc drive to these operating system device
drivers.
If you build a system with a single drive from scratch, then the boot drive's capacity is limited to
the capability of the original OS installation CD. This means that a large boot drive may not see
the benefit of 48-bit addressing during the first partitioning. At this time (Jan 2003) WinXP and
Win2000 Installation CDs with native 48-bit addressing are commercially available.
A complex procedure called "slipstreaming" allows you to merge a Windows Service Pack with an
original OS installation CD. You can search the Internet for "slipstreaming Windows " to find
instructions on this process. Seagate does not assist in preparing slipstream installation CDs.
Seagate does not recommend this method because even though the SP is integrated into the
OS, a specific required registry setting EnableBigLBA may not yet be activated.
http://support.microsoft.com/default.aspx?scid=kb;en-us;303013
=====================
48 bit addressing allows 144 Petabytes data access
http://www.48bitlba.com/
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