when windows 2000 starts up in my dual boot system i get the following message "Boot record signature AA55 not found (2A55 FOUND)" so right now i am typing from win98 but it dosent see the 2nd hard drive where win2k is also located. I have read the text and info on other sites like microsoft about this error but can someone in plain english step by step explain how i can fix this?? THANKS!
Please HELP me with Win2000!!!
- Thread starter Eminem2k1
- Start date
So I guess you haven't try the FDISK /MBR ... Well, put a bootdisk in your floppy drive, then boot your computer. Make sure the computer boots on your floppy by checking the BIOS settings... Should be something like A:, C:, CDROM. Well as long as A: is in first. Then when the DOS prompt appears, just type FDISK / MBR . Its supposed to work, if Microsoft is right!
<< So I guess you haven't try the FDISK /MBR ... Well, put a bootdisk in your floppy drive, then boot your computer. Make sure the computer boots on your floppy by checking the BIOS settings... Should be something like A:, C:, CDROM. Well as long as A: is in first. Then when the DOS prompt appears, just type FDISK / MBR . Its supposed to work, if Microsoft is right! >>
is there any chance of me loosing my data??
Hmmm should have read more about this topic on Microsoft's site...
Ok it will be a little bit more complicated... Give me a little time to experience what they are saying then I'll be back...
Ok it will be a little bit more complicated... Give me a little time to experience what they are saying then I'll be back...
Did you ever create an Emergency Repair Disk at Windows 2000 setup or subsequently through the Disk Manager? If not, you may be out of an easy fix. Most of the utils for NTFS must be used in Windows NT 4.x/5.x. Since you have another drive, you can install Windows 2000 on the other drive and try using the utilities to repair the MBR/MFT.
Most likely any attempt to do a repair via CD or system console (prob wouldn't boot), won't work because booting from CD will probably not see the Windows installation with a corrupted MBR/MFT.
If you created an Emergency Repair Disk, maybe you can boot from CD and repair with the option.
Most likely any attempt to do a repair via CD or system console (prob wouldn't boot), won't work because booting from CD will probably not see the Windows installation with a corrupted MBR/MFT.
If you created an Emergency Repair Disk, maybe you can boot from CD and repair with the option.
As found on the Microsoft's link you gave us --->
If Windows is installed on a logical drive in an extended partition, after the BOOT MENU choice and NTDETECT runs, this error message will appear:
OS Loader 4.0
Boot record Signature AA55 Not Found, xxyy Found.
How did you set your dual boot partitions???
If Windows is installed on a logical drive in an extended partition, after the BOOT MENU choice and NTDETECT runs, this error message will appear:
OS Loader 4.0
Boot record Signature AA55 Not Found, xxyy Found.
How did you set your dual boot partitions???
Ok here's what I found that could help you. I've followed what was on Microsoft's site. Remember that playing with MBR can cause problems... So, yes there may be a chance of loosing data so backup all your files before doing this.! There?s a warning on Microsoft?s site :
WARNING: This process will repair the bootstrap code and the 55AA signature by rewriting sector zero but will also overwrite the partition table entries with all zeros, rendering your logical drives useless (unless, that is, the 55AA signature is manually entered using a disk editor prior to your performing the FDISK /MBR).
The
unless, that is, the 55AA signature is manually entered using a disk editor prior to your performing the FDISK /MBR
part is telling us that you shouldn?t loose your partitions but then again, it?s a risk?
I'm assuming that you have at least a little knowledge of DOS commands? I?m also assuming that you have a bootdisk, or know how to make one. If not, go to this thread.
Now let?s start with the programs that you will need :
DiskSave.exe from Microsoft
Partition Table Editor from PowerQuest (The download file is totally at the end of the web page. It's saying:
GUI version:
Download Ptedit32 (Win9x/NT) here
(30 JUN 2000 ) [ 180 kb .zip ]
-Install the rkTools and unzip the Partition Table Editor.
-Now reboot your computer and place your bootdisk in so you can have a DOS Prompt.
-Choose not to support CD-Rom because you don?t need it.
-Go on in the folder where the rkTools are installed and type ?disksave?
-A menu will appear choose the option ?Backup the Master Boot Record? (F2)
-Enter a full path where the file will be saved (Ex.: c:\backupmbr.bin)
-Choose ?Backup the Boot Sector? (F4)
-Enter another full path for this file.
-Now exit this program, and reboot the computer (don?t forget to remove the bootdisk)
-In windows, start the PowerQuest?s Partition Table Editor program.
-Select the partition that is bootable. You?ll know this because when you?ll select
good partition number (the numbers starts from 1 to ? in the left column), the
Boot Record button will be activated.
-Press on that button. You?ll see a lot of values and stuff.
-Go at the last case. The Signature (No. 23). The value there should be AA55. If it?s not that value, then you?ll have to change it. Do this now then press the Write button.
-(This next part I haven?t tried but should be like this) The program will write in the partition table and will probably reboot.
-Put the bootdisk again while rebooting to get in the DOS mode again.
-Type FDISK /MBR when everything is loaded.
-Reboot/remove the floppy drive?
-The error should be gone? Well hope so. If not then I can?t help you more than that!!!
This took me a while to do so hope this will help you!
Tell me the results!
See ya!
P.S. If a problem appeared while doing this, boot in DOS with the bootdisk and start Disksave again. But this time select the Restore Master Boot Record and Restore Boot Sector. Don?t forget to write the full and correct path of the binairies files?
WARNING: This process will repair the bootstrap code and the 55AA signature by rewriting sector zero but will also overwrite the partition table entries with all zeros, rendering your logical drives useless (unless, that is, the 55AA signature is manually entered using a disk editor prior to your performing the FDISK /MBR).
The
unless, that is, the 55AA signature is manually entered using a disk editor prior to your performing the FDISK /MBR
part is telling us that you shouldn?t loose your partitions but then again, it?s a risk?
I'm assuming that you have at least a little knowledge of DOS commands? I?m also assuming that you have a bootdisk, or know how to make one. If not, go to this thread.
Now let?s start with the programs that you will need :
DiskSave.exe from Microsoft
Partition Table Editor from PowerQuest (The download file is totally at the end of the web page. It's saying:
GUI version:
Download Ptedit32 (Win9x/NT) here
(30 JUN 2000 ) [ 180 kb .zip ]
-Install the rkTools and unzip the Partition Table Editor.
-Now reboot your computer and place your bootdisk in so you can have a DOS Prompt.
-Choose not to support CD-Rom because you don?t need it.
-Go on in the folder where the rkTools are installed and type ?disksave?
-A menu will appear choose the option ?Backup the Master Boot Record? (F2)
-Enter a full path where the file will be saved (Ex.: c:\backupmbr.bin)
-Choose ?Backup the Boot Sector? (F4)
-Enter another full path for this file.
-Now exit this program, and reboot the computer (don?t forget to remove the bootdisk)
-In windows, start the PowerQuest?s Partition Table Editor program.
-Select the partition that is bootable. You?ll know this because when you?ll select
good partition number (the numbers starts from 1 to ? in the left column), the
Boot Record button will be activated.
-Press on that button. You?ll see a lot of values and stuff.
-Go at the last case. The Signature (No. 23). The value there should be AA55. If it?s not that value, then you?ll have to change it. Do this now then press the Write button.
-(This next part I haven?t tried but should be like this) The program will write in the partition table and will probably reboot.
-Put the bootdisk again while rebooting to get in the DOS mode again.
-Type FDISK /MBR when everything is loaded.
-Reboot/remove the floppy drive?
-The error should be gone? Well hope so. If not then I can?t help you more than that!!!
This took me a while to do so hope this will help you!
Tell me the results! See ya!
P.S. If a problem appeared while doing this, boot in DOS with the bootdisk and start Disksave again. But this time select the Restore Master Boot Record and Restore Boot Sector. Don?t forget to write the full and correct path of the binairies files?
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