China DOS Union

Sender: smart007 (Xiao Nie), Board: DOS
Title: What should I do if the DOS partition is damaged?
Date: Sun Apr 28 17:09:05 1996

The machine won't boot,
C:invalid drive specification

What should I do?

--


*****************************
| Holding the sword of wisdom, wearing the armor of magnanimity |
| Spreading love in all directions, upholding justice across the land |
| |
| --- Xiao Nie |
*****************************


Sender: Casper (Wang Hu), Board: DOS
Title: Re: What should I do if the DOS partition is damaged?
Date: Sun Apr 28 18:08:30 1996

==> smart007 (Xiao Nie) mentioned:
> The machine won't boot,
> C:invalid drive specification
> What should I do?
Try NU.
Sender: smart007 (Xiao Nie), Board: DOS
Title: Re: What should I do if the DOS partition is damaged?
Date: Sun Apr 28 19:57:23 1996

==> Casper (Wang Hu) mentioned:
> ==> smart007 (Xiao Nie) mentioned:
> > The machine won't boot,
> > C:invalid drive specification
> > What should I do?
> Try NU.

Norton Utility?

--


*****************************
| Holding the sword of wisdom, wearing the armor of magnanimity |
| Spreading love in all directions, upholding justice across the land |
| |
| --- Xiao Nie |
*****************************


Sender: dong3@SMTH (LaoDong), Board: DOS
Title: Re: What should I do if the DOS partition is damaged?
Posted from: Shuimu Tsinghua (Sun Apr 28 20:14:03 1996)
Forwarded from: SMTH

==> smart007 (Xiao Nie) mentioned:
> The machine won't boot,
> C:invalid drive specification
> What should I do?
1. Use the following method to make the hard disk valid.
Boot DOS from drive A
DEBUG
-A
XXXX:0100 mov ax,0201
......... mov bx,1000
......... mov cx,0001
......... mov dx,0080
......... int 13
......... int 20
.........

-G
-E 11FE
Enter 55 Spacebar AA in sequence (that is, change the bytes at offsets 11FE and 11FF to 55H and AAH)
-A 100
XXXX:0100 mov ax,0301
.........
-G
-q
Power off and restart.
2. If the above method still cannot reboot, then boot from A again and use nu; generally it can succeed.

Good luck!




Sender: js (Jie Zu Deng), Board: DOS
Title: Re: What should I do if the DOS partition is damaged?
Date: Sun Apr 28 20:57:16 1996

==> smart007 (Xiao Nie) mentioned:
> The machine won't boot,
> C:invalid drive specification
> What should I do?
Use FDISK /mbr to restore the hard disk master boot sector,
use NDD to recover the lost partition table,
then use SYS.
If you have DISKTOOL, its make bootable disk function can ensure your hard disk can boot.

Sender: Casper (Wang Hu), Board: DOS
Title: Re: What should I do if the DOS partition is damaged?
Date: Tue Apr 30 09:05:36 1996

==> dong3@SMTH (LaoDong) mentioned:
> ==> smart007 (Xiao Nie) mentioned:
> > The machine won't boot,
> > C:invalid drive specification
> > What should I do?
> 1. Use the following method to make the hard disk valid.
> Boot DOS from drive A
> DEBUG
> -A
> XXXX:0100 mov ax,0201
> ......... mov bx,1000
> ......... mov cx,0001
> ......... mov dx,0080
> ......... int 13
> ......... int 20
> .........
> -G
> -E 11FE
> Enter 55 Spacebar AA in sequence (that is, change the bytes at offsets 11FE and 11FF to 55H and AAH)
> -A 100
> XXXX:0100 mov ax,0301
> .........
> -G
> -q
> Power off and restart.
Reading the master boot record once, then writing it once again—I don't know the point. 55AA are the
last two bytes of the boot sector; I don't know what virus writing them again is meant to target.
> 2. If the above method still cannot reboot, then boot from A again and use nu; generally it can succeed.
> Good luck!
>

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