DOCUMENT:Q119674 01-OCT-1999 [win95x] TITLE :Windows Err Msg: WDCTRL Validation Failed at Phase PRODUCT :Microsoft Windows 95.x Retail Product PROD/VER:WINDOWS:3.1,3.11 OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows versions 3.1, 3.11 - Microsoft Windows for Workgroups versions 3.1, 3.11 ------------------------------------------------------------------------------- SUMMARY ======= This article lists the meaning of the various phases that are displayed in the following error message at Windows startup if 32-bit disk access is enabled The Microsoft Windows 32-bit disk driver (WDCTRL) validation failed at phase . where is a specific phase. MORE INFORMATION ================ Below are the various phases that can appear in the above error message and a brief description of each: Phase 0: Int 13h, AH=8, GetDriveParms results failed; compare with FDPT (Fixed Disk Parameter Table, pointer got through int 41h/46h-xxxx) Phase 1: Number of heads differ Phase 2: Number of sectors differ Phase 3: Number of cylinders differ The next phases are read: Phases 4 - A -> HCS:0/0/1 (Head/Cylinder/Sector notation) Phases B - 11 -> Sector #503 (to control sector mapping) Phases 12 - 18 -> HCS:last-1/last-1/last-1 Phase 4/B/12: Read Sector 1/503/"last-but one" through int 13 failed Phase 5/C/13: Status reg of Controller says failure Phase 6/D/14: Wrong sector count Phase 7/E/15: Wrong sector number Phase 8/F/16: Wrong cylinder number Phase 9/10/17: Wrong sector size (not equal to 512 bytes) or drive Phase A/11/18: Wrong status from controller or difference in direct read data from int 13 read data. KBCategory: kbother kberrmsg KBSubcategory: win31 wfw wfwg winboot Additional query words: 3.10 3.11 err msg wdctrl fastdisk ====================================================================== Keywords : Technology : kbAudDeveloper kbWin3xSearch kbWFWSearch kbZNotKeyword3 kbWin310 kbWin311 kbWFW310 kbWFW311 Version : WINDOWS:3.1,3.11 ============================================================================= 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 1999.