How to Recover Mirroring Windows NT Using IDE devices

Last reviewed: April 25, 1997
Article ID: Q141702

3.50 3.51 WINDOWS NT kbsetup kbhowto

The information in this article applies to:

Microsoft Windows NT Server version 3.5
Microsoft Windows NT Server version 3.51
Microsoft Windows NT Server version 4.0

SUMMARY This article provides the steps necessary to recover mirroring using IDE devices under Windows NT. This article should be used in conjunction with the information in the following article in the Microsoft Knowledge Base, which explains how to create a NT Fault Tolerant Boot Disk

   ARTICLE-ID: Q119467
   TITLE: Creating a Boot Disk for an NTFS or FAT Partition

   ARTICLE-ID: Q102873
   TITLE: BOOT.INI and ARC Path Naming Conventions and Usage

Soft Mirroring (Windows NT) does NOT mirror MBR/PT entries, as soft mirroring is only designed to mirror a partition's data, and cannot guarantee boot capability of the Shadow (mirrored) drive. Thus you should always have a valid NT Fault Tolerant Boot Floppy created in the event the Primary drive fails.

  ARTICLE-ID: Q117131
  TITLE: Master Boot Record Not Written To Mirrored Shadow Partition

MORE INFORMATION

The IDE specification requires that a working master drive be available at all times to be able to gain access to other IDE drives on the system. following are the appropriate steps to mirror an IDE hard drive with another.

Step-by-Step Procedures

If the shadow (mirrored) hard drive is on the same channel set as an IDE Slave device then use the "Failed Primary on the Same IDE Channel" section of this article below.

If the shadow (mirrored) hard drive is on the Secondary channel across from the failed Primary drive then see the "Failed Primary is on the Primary IDE Channel and the Shadow is on the Secondary" section of this article below.

Failed Primary on the Same IDE Channel (Shadow drive is a Slave IDE Device

*** If the replacement drive HAS ALREADY been installed: ***

Edit your Windows NT FT boot disk's Boot.ini file to point to:
```
     multi(0)disk(0)rdisk(1)...
```

2. If the replacement drive is not identical to the failed IDE hard drive,

   you must go into CMOS and use either the AUTO DETECT HARD DRIVE feature
   in your CMOS or manually set the new hard drive Heads/Cylinders/Sectors.

3. Boot the Windows NT FT boot disk and load Windows NT. 4. Start Disk Administrator, and break the mirror. 5. Establish another mirror by mirroring from the slave hard drive to the

   master drive.

*** If the replacement drive HAS NOT been installed: ***

Verify that the jumper on the Shadow IDE hard drive is moved from Slave to Master or standalone.

2. Edit your Windows NT FT boot disk's Boot.ini file to point to:

     multi(0)disk(0)rdisk(0)...

3. If the shadow drive is not identical to the failed IDE hard drive,

   you must go into CMOS and use either the AUTO DETECT HARD DRIVE feature
   in your CMOS or manually set the new hard drive Heads/Cylinders/Sectors.

3. Boot the Windows NT FT boot disk and load Windows NT. 4. Start Disk Administrator, and break the mirror. 5. Establish another mirror by mirroring from this hard drive to the

   new Shadow (IDE Slave) drive.

Failed Primary is master the on the Primary IDE Channel and the Shadow is master on the Secondary IDE Channel

*** If the replacement drive has already been installed: ***

1) Edit your Windows NT FT boot disk's Boot.ini file to point to:

     multi(1)disk(0)rdisk(0) if the Shadow drive is the Master Device of
     the Secondary Channel
     multi(0)disk(0)rdisk(2) may also work

     multi(1)disk(0)rdisk(1) if the Shadow drive is the Slave Device of the
     Secondary Channel
     Multi(0)disk(0)rdisk(3) may also work.

2) If the replacement drive is not identical to the failed IDE hard drive,

   you must go into CMOS and use either the AUTO DETECT HARD DRIVE feature
   in your CMOS or manually set the new hard drive Heads/Cylinders/Sectors.

3) Boot the Windows NT FT boot disk and load Windows NT. 4) Start Disk Administrator, and break the mirror. 5) Establish another mirror by mirroring from the this hard drive to the

   new Shadow drive.

*** If the replacement drive HAS NOT been installed: ***

1) Move the Shadow drive to the Primary Channel as the Master Device and

   ensure it is jumpered in the same manner as the Failed Primary drive.

2) Edit your Windows NT FT boot disk's Boot.ini file to point to:

     multi(0)disk(0)rdisk(0) if the Shadow drive is the Master Device of
     the Primary Channel.
     multi(0)disk(0)rdisk(1) if the Shadow drive is the Slave Device of the
     Primary Channel.

3. If the Shadow drive is not identical to the failed Primary IDE hard

   drive, you must go into CMOS and use either the AUTO DETECT HARD DRIVE
   feature in your CMOS or manually set the new hard drive
   Heads/Cylinders/Sectors.

4. Boot the Windows NT FT boot disk and load Windows NT. 5. Start Disk Administrator, and break the mirror. 6. Establish another mirror by mirroring from this hard drive to the

   new shadow drive.

Additional reference words: 3.50 prodnt eide raid1 raid ide ata-2 ata
KBCategory: kbsetup kbhowto
KBSubcategory: ntsetup
Keywords : ntsetup kbhowto kbsetup
Version : 3.50 3.51
Platform : NT WINDOWS

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.

Last reviewed: April 25, 1997
© 1998 Microsoft Corporation. All rights reserved. Terms of Use.