[net.micro.att] Recovering 6300 Hard Disk

gemini@homxb.UUCP (Rick Richardson) (04/13/86)

To remove a version 2.0 VENIX/86, just "dd" any random garbage to
the first block of /dev/w0.phys (the partition table).  Under
VENIX/286 SVR2, you can use the "fdisk" command.  If VENIX isn't
running, then you can either:
	1) Do a low level format
	2) Enter a program from DOS DEBUG to blast the first block of
	   the disk:
		debug
		a 100
		mov	ax,0301		/* Write 1 sector */
		mov	cx,0001		/* at cyl 0, sector 1 */
		mov	dx,0080		/* drive 0, head 0 */
		int	13
		int	20		/* terminate */
		g 100

[Note: I have done this in the past, but the above program is from
memory.  The data you write to the first block is not important, as
long as it doesn't happen to be another valid partition table!]

Rick Richardson, PC Research, Inc. (201) 922-1134, (201) 834-1378 @ AT&T-CP
..!ihnp4!castor!{rer,pcrat!rer} <--Replies to here, not to homxb!gemini, please.