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From: "Rodney W. Grimes" <rgrimes@gndrsh.aac.dev.com>
Message-Id: <199505140715.AAA02343@gndrsh.aac.dev.com>
Subject: Re: cvs commit: src/usr.sbin/bad144 bad144.8 bad144.c
To: rgrimes@freefall.cdrom.com (Rodney W. Grimes)
Date: Sun, 14 May 1995 00:15:03 -0700 (PDT)
Cc: CVS-commiters@freefall.cdrom.com, cvs-usrsbin@freefall.cdrom.com
In-Reply-To: <199505140705.AAA25687@freefall.cdrom.com> from "Rodney W. Grimes" at May 14, 95 00:05:49 am
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> 
> rgrimes     95/05/14 00:05:48
> 
>   Modified:    usr.sbin/bad144  bad144.8 bad144.c
>   Log:
>   Add bad144 -s option to scan entire slice of disk.
>   
>   Obtained from:	FreeBSD 1.1.5.1 (Just the scan function itself was added)

This is not completed work, but fully functional as far as I can test it
(I don't have any disks with bad blocks on them, phk has looked at this
breifly and will be testing it during the day today after he gets up).

There are 3 to 4 pending bugs from myself and Bruce Evans against this
code, but they are all very minor nits and should not stop the code
from doing the job it is suppose to.

You can even use this to find bad blocks on your scsi disk with
this command:
bad144 -s -v -n /dev/rsd0c

The -n option is not documented, but it says to not write to the
disk (ie don't set the bad144 flag, and don't write the bad144 table
that would currupt the end of your last partition.  NOTE that if
you forget that -n option you could DAMAGE YOUR FILE SYSTEM!!!

There is no bad144 support in the scsi disk drivers, so this will
not work for mapping blocks out of a scsi disk using bad144, but
you can use scsi(8) to turn on automatic read reallocation and then
scan the disk with this and it should automagically remap the
block for you!!

-- 
Rod Grimes                                      rgrimes@gndrsh.aac.dev.com
Accurate Automation Company                   Custom computers for FreeBSD