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i/o error accessing boot sector file

By dwaynemudd ·
I have a dual boot system.. it orginally ran win 95 and later was transformed into a dual boot system incorporating win nt 4.0. right now i can't boot into win 95. the system freezes with the error message "i/o error accessing boot sector file multi(0) rdisk(0) partition(1)\\bootss"
this message relates to the bootsect.dos file.
the instructions i found tell me to transfer the bios parameter block (bpb) from the boot drive (c) at sector 0 into the boot code from the previous operating system and write this into the bootsect.dos.

step 1 is to use a generate a boot sector for the previous operating system.

it says (for example, if the previous operating system is ms-dos, boot ms-dos from a floppy disk and run the sys c: command...ok.....

my previous operating system was win 95...

so when i boot from the win 95 start up disk does this generate the boot sector or is there a command that i have to run to do this before going to step 2 which involves win nt setup......

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i/o error accessing boot sector file

by NTOz In reply to i/o error accessing boot ...

This problem usualy occours when the bootsect.dos file has been deleted. The file has a virtual copy of your Windows 95 boot sector. An easy way to fix this, provided that your file system is still fat.

1. Create a Windows 95 system disk. You cando this from any windows 95 system. Format a floppy and request that the format copy the system files.

2. Find the file, sys.com and copy it to the floppy drive.

3. Backup your boot.ini file just in case. Make sure you have a current emergency repair disk.

4. Boot on your floppy drive and issue the command from the A: prompt sys C: This will restore your boot sector to the boot sector.

5. Reinstall Windows NT into an alternative directory.

6. Boot your system into the alternative directory, copy your saved boot.ini in place of the current boot.ini

7. Reboot, you should now have access to both Windows 95 and Windows NT. You will also want to delete your alternative installation of Windows NT.

The Instructions your talking about are:
Bootsect.dos is created by Windows NT Setup. The boot sector found in
sector 0 of drive C is copied into Bootsect.dos before Setup writes the
Windows NT boot sector. (Setup will not overwrite an existing
Bootsect.dos.) If you choose a previous operating system, Windows NT
executes Bootsect.dos, simulating the previous operating system's normal
boot procedure.

Because the information in Bootsect.dos is really created by the previous
operating system, it is very difficult to re-create. You must transfer the
BIOS parameter block (BPB) from the boot drive (C) at sector 0 into the
boot code from the previous operating system and write this into
Bootsect.dos. To do this, use the following procedure:

1. Use the proper utility to regenerate a boot sector for the previous operating
system. For example, if the previous operating system is MS-DOS, boot MS-DOS
from a floppy disk and run th

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i/o error accessing boot sector file

by dwaynemudd In reply to i/o error accessing boot ...

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i/o error accessing boot sector file

by mm212 In reply to i/o error accessing boot ...

Did you convert your partitions to NTFS? If your Windows 95 partition was converted to NTFS, it WON'T boot.

Unfortunately, the only way to convert it back is to delete and re-create the partition, losing all your data in the process. Of course, you could boot into NT, copy any data off of the Win95 partition, then delete it.

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i/o error accessing boot sector file

by dwaynemudd In reply to i/o error accessing boot ...

very helpful... just what i needed to know... thanks

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i/o error accessing boot sector file

by dwaynemudd In reply to i/o error accessing boot ...

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