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137 GB barier in XP

 
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mistux
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Joined: 25 Jun 2004
Posts: 1042
Location: South Bend, Indiana USA

PostPosted: Sat May 05, 2007 10:53 am    Post subject: 137 GB barier in XP Reply with quote

How to enable 48-bit Logical Block Addressing support for ATAPI disk drives in Windows XP

This article was previously published under Q303013

INTRODUCTION
This article describes the Microsoft Windows XP Service Pack 1 (SP1) 48-bit Logical Block Addressing (LBA) support for ATA Packet Interface (ATAPI) disk drives that can increase the capacity of your hard disk to more than the current 137 gigabyte (GB) limit.

Note Windows XP does not support 48-bit LBA support unless you are running Windows XP SP1. If you want to use 48-bit LBA support, you must apply Windows XP SP1 or later. Windows XP Media Center Edition and Windows XP Tablet PC Edition already include SP1.

For additional information about the latest service pack for Windows XP, click the following article number to view the article in the Microsoft Knowledge Base:
322389 (http://support.microsoft.com/kb/322389/) How to obtain the latest Windows XP service pack
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MORE INFORMATION
Windows XP SP1 includes 48-bit LBA support for ATAPI disk drives. With this support, you can use hard disks that are larger than the current 137 GB limit. By default, support is enabled in SP1. To determine if you are running SP1, right-click My Computer and then click Properties. On the General tab, Service Pack 1 will be listed under "System."

To determine if you have the latest ATAPI driver, verify that you have version 5.1.2600.1135 or later of the Atapi.sys file in your %systemroot%\system32\drivers folder. (Or version 5.1.2600.1152 for Windows XP 64-Bit Edition.) To do this, follow these steps:1. Click Start, click Search, and then click All Files and Folders.
2. Type Atapi.sys, and then click Search.
3. If you do not find the Atapi.sys file in your %systemroot%\system32\Drivers folder, click More advanced options in Search Companion, click Search hidden files and folders, and then repeat step 2.

For additional information about how to search for hidden and system folders, click the following article number to view the article in the Microsoft Knowledge Base:
302347 (http://support.microsoft.com/kb/302347/) How to search for hidden or system files in Windows XP
4. Right-click Atapi.sys in your %systemroot%\System32\Drivers folder, and then click Properties.
5. Note the file version on the Version tab.
If Atapi.sys is not version 5.1.2600.1135 (or version 5.1.2600.1152 for Windows XP 64-Bit Edition), obtain and install the hotfix that is described in Microsoft Knowledge Base article 331958.

For additional information about this hotfix, click the following article number to view the article in the Microsoft Knowledge Base:
331958 (http://support.microsoft.com/kb/331958/) Hard disk may become corrupted when entering standby or hibernation or when writing a memory dump
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dawn
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Joined: 26 Jun 2004
Posts: 311
Location: Mishawaka, IN

PostPosted: Mon May 07, 2007 7:29 am    Post subject: Windows 2000 137 GB Barier Reply with quote

48-Bit LBA Support for ATAPI Disk Drives in Windows 2000

Article ID : 305098
Last Review : February 22, 2007
Revision : 7.4

This article was previously published under Q305098

SYMPTOMS
Windows 2000 Service Pack 2 (SP2) and earlier versions of Windows 2000 do not support 48-bit Logical Block Addressing (LBA) as defined in the ATA/ATAPI 6.0 specification.
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RESOLUTION
To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
260910 (http://support.microsoft.com/kb/260910/EN-US/) How to Obtain the Latest Windows 2000 Service Pack
The English-language version of this fix should have the following file attributes or later: Date Time Version Size File name
--------------------------------------------------------
10/19/2001 01:42 PM 5.0.2195.4529 86,768 Atapi.sys
04/19/2002 05:43 PM 214,938 Update.inf


The following conditions are necessary for the correct functioning of 48-bit LBA ATAPI support: • A computer with a 48-bit LBA-compatible Basic Input/Output System (BIOS) installed.
• A computer with a hard disk that has a capacity of greater than 137 gigabytes (GB).
• You must enable the support in the Windows registry by adding or changing the EnableBigLba registry value to 1 in the following registry subkey:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\atapi\Parameters
To enable 48-bit LBA large-disk support in the registry: 1. Start Registry Editor (Regedt32.exe).
2. Locate and then click the following key in the registry:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Atapi\Parameters
3. On the Edit menu, click Add Value, and then add the following registry value:
Value name: EnableBigLba
Data type: REG_DWORD
Value data: 0x1
4. Quit Registry Editor.
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