Date: Fri, 07 Dec 2012 16:34:33 -0700 From: Ian Lepore <freebsd@damnhippie.dyndns.org> To: Bas Smeelen <b.smeelen@ose.nl> Cc: freebsd-current@freebsd.org Subject: Re: 9.1-RC3 LiveCD missing features Message-ID: <1354923273.87661.273.camel@revolution.hippie.lan> In-Reply-To: <50C26EF3.5070300@ose.nl> References: <CAFYkXj=R=V=3pUH9FbKq3pdqtga-EuJuTB1avZxi2bkLhUs5WA@mail.gmail.com> <50C26999.6090802@gmail.com> <50C26EF3.5070300@ose.nl>
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On Fri, 2012-12-07 at 23:34 +0100, Bas Smeelen wrote: > On 12/07/12 23:11, Chuck Burns wrote: > > On 12/7/2012 3:50 PM, CeDeROM wrote: > >> Hello :-) > >> > >> I have tried to chceck for badblocks on my / but I did not find > >> badblocks > >> program on LiveCD and there is no option to install it. This is very > >> useful > >> utility, please add it as part of LiveCD :-) > >> > >> Also there is a problem with DHCP based workstations using LiveCD - > >> although interface gets configured it is impossible to update > >> /etc/resolv.conf (by dhclient and by hand) and so this workstation > >> pretty > >> useless for IPv4 (is it more usable on IPv6?). Please update :-) > >> > >> Thank you :-) > >> Tomek > >> > >> > > > > dd if=/dev/zer of=/dev/ada0 > > > > ^^^ There's your "badblocks" program. Any hard drive made in the last > > decade have been self-remapping.. Attempting to write to a bad block > > will cause the hard drive to remap an unused sector into it's place, > > until the drive runs out of said "unused" backup sectors, and at that > > time, will begin simply begin just "losing" storage space... IE the > > number of total sectors on the drive will begin to shrink. > > > :) > > /dev/zero > > Badblocks is outdated for more than 17 years I guess > The dd mentioned above will let the firmware remap all bad sectors until > there are no spare sectors left (and wipe anything on disk as a bonus :) > ;then you can begin to think about replacing your harddrive. > > As for DHCP, it works for me when booting from a netinstall for instance > or going to fixit. > Tomek, please try to describe more accurately what you are doing and try > to accomplish > > Cheers When booting a system with a read-only root filesystem (a LiveCD is one example of such), DHCP works in the sense that you get an IP address, but because it can't write the nameserver address into /etc/resolv.conf you're left with a system that's on a network but you can't do much with it unless you have a really good memory for IP addresses. It has to be fixed when the readonly filesystem is created. If you make /etc/resolv.conf a symlink to ../var/db/resolv.conf it works out pretty well. If you're not using dhcp, then instead of having a missing /etc/resolv.conf you have a symlink to missing file. When you are using DHCP, it is able to write the resolv.conf file in /var and life is good. -- Ian
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