DOCUMENT:Q245637 08-MAY-2002 [winnt] TITLE :Some LARGE LUN Numbers Are Not Available to the Computer PRODUCT :Microsoft Windows NT PROD/VER::4.0 SP5,4.0 SP6 OPER/SYS: KEYWORDS:kbWinNT400PreSP7Fix ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Server versions 4.0 SP5, 4.0 SP6 - Microsoft Windows NT Workstation versions 4.0 SP5, 4.0 SP6 ------------------------------------------------------------------------------- SYMPTOMS ======== When you configure a computer to use LARGE LUN Support, such as on a Fibre Channel controller, some of the LUNs assigned to disks or other devices are not visible to other system drivers or the computer. Only 231 of the 256 possible LUNs are visible. The LUNs that are not visible are in the following ranges: 64 to 71 128 to 135 192 to 199 255 RESOLUTION ========== A supported fix is now available from Microsoft, but it is only intended to correct the problem described in this article and should be applied only to systems experiencing this specific problem. To resolve this problem, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web: http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS NOTE: In special cases, charges that are normally incurred for support calls may be canceled, if a Microsoft Support Professional determines that a specific update will resolve your problem. Normal support costs will apply to additional support questions and issues that do not qualify for the specific update in question. The English-language version of this fix should have the following file attributes or later: Date Time Size File name Platform ---------------------------------------------------- 10/25/1999 01:57p 35,504 Scsiport.sys i386 10/25/1999 01:56p 56,400 Scsiport.sys alpha For additional information on LargeLun support in Windows, click the article number below to view the article in the Microsoft Knowledge Base: Q310072 Adding Support for More Than Eight LUNs in Windows Server STATUS ====== Microsoft has confirmed this to be a problem in Windows NT 4.0. Additional query words: ====================================================================== Keywords : kbWinNT400PreSP7Fix Technology : kbWinNTsearch kbWinNTWsearch kbWinNTW400search kbWinNT400search kbWinNTW400sp5 kbWinNTSsearch kbWinNTS400sp6 kbWinNTS400sp5 kbWinNTS400search kbWinNTW400sp6 Version : :4.0 SP5,4.0 SP6 Hardware : ALPHA x86 Issue type : kbbug Solution Type : kbfix ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2002.