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Date: Sun, 14 May 1995 12:20:04 -0700
Message-Id: <199505141920.MAA23301@freefall.cdrom.com>
From: "Rodney W. Grimes" <rgrimes@gndrsh.aac.dev.com>
Reply-To: "Rodney W. Grimes" <rgrimes@gndrsh.aac.dev.com>
To: freebsd-bugs
Subject: bin/410: bad144
In-Reply-To: Your message of Sun, 14 May 1995 12:16:42 -0700
	<199505141916.MAA04164@gndrsh.aac.dev.com>
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>Number:         410
>Category:       bin
>Synopsis:       bad144(8) should probably scan the bad block remap sectors
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs (FreeBSD bugs mailing list)
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun May 14 12:20:02 1995
>Originator:     Rodney W. Grimes
>Organization:
Rod Grimes                                      rgrimes@gndrsh.aac.dev.com
Accurate Automation Company                   Custom computers for FreeBSD
>Release:        FreeBSD 2.1.0-Development i386
>Environment:

	FreeBSD 2.0.5 and later that support bad144 -s processing

>Description:
	From Bruce Evans:
	Actually it would be a good idea to check the 126 + (5 * 2 -1) sectors
	beyond the above `bend' and complain louder if any are bad.  I'm not
	sure if bad144 handles recursive remapping of bad sectors!  I think
	it handles bad sectors in the bad sector table itself OK.  There are
	5 copies of the table, and the first good one is used.

>How-To-Repeat:

	Find a disk with a bad block in the bad144 spare sector area
	and note that bad144 -s does not find it.   Not sure what will
	happen if bad144 goes to remap a block into this area and finds
	that the remap block is bad.

>Fix:

	For bad144 change bend to size in the scan loop, for the
	kernel handling of recursive mapping unknown.

Index: bad144.c
===================================================================
RCS file: /home/ncvs/src/usr.sbin/bad144/bad144.c,v
retrieving revision 1.7
diff -c -r1.7 bad144.c
*** 1.7	1995/05/14 08:40:37
--- bad144.c	1995/05/14 19:15:12
***************
*** 221,227 ****
  		printf("Starting scan of %s at cylinder %ld\n",
  			name, bstart/spc);
  		step = trk;
! 		for (curr_sec = bstart; curr_sec < bend; curr_sec += step) {
  			int gotone = 0;
  
  			if (verbose) {
--- 221,227 ----
  		printf("Starting scan of %s at cylinder %ld\n",
  			name, bstart/spc);
  		step = trk;
! 		for (curr_sec = bstart; curr_sec < size; curr_sec += step) {
  			int gotone = 0;
  
  			if (verbose) {

>Audit-Trail:
>Unformatted: