Date: Thu, 06 Mar 2008 14:52:28 +0100 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-stable@freebsd.org Subject: Re: kernel backup on 7.0 Message-ID: <fqosnh$dv0$1@ger.gmane.org> In-Reply-To: <20080306132859.GA88810@eos.sc1.parodius.com> References: <47CE6C6B.8060306@bluegod.net> <fqm6e4$idp$1@ger.gmane.org> <47CFE384.4060607@bluegod.net> <fqophl$1ju$1@ger.gmane.org> <20080306132859.GA88810@eos.sc1.parodius.com>
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This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig8191DB18DD6178994DC0EC5A Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Jeremy Chadwick wrote: > On Thu, Mar 06, 2008 at 01:58:08PM +0100, Ivan Voras wrote: >> James L=C3=B3pez (BLuEGoD) wrote: >> >>> Not exactly.. What I mean is that I want to reinstall FreeBSD due to >>> some accidentally deleted files and a behavior on sendfile :S >>> So I would like to know if I can backup /boot and the overwrite it on= ce >>> I have freebsd installed again... >> Yes. If you don't change FreeBSD versions or hardware, this will work.= >=20 > Clarification: it _might_ work. >=20 > You need to keep in mind that the kernel/modules he's backing up will > very likely *not* match all the binaries he has on his disks, library > calls, possibly system calls, etc. etc... This is why building world > includes both all the binaries *as well* as the kernel. I agree, but I think this is covered by "not changing FreeBSD versions" := ) > The reason I point this out is, when certain things in kernel-land > change which certain programs rely upon (but haven't been recompiled to= > be aware of that change), odd things can happen. The most "famous" of > the bunch is when top(1) or ps(1) start failing in bizarre ways. >=20 > Thus, my point: it *probably* will work, but DO NOT assume that it will= =2E To be even more precise, it will probably (with very high certainty) work for two FreeBSD versions x1.y1 and x2.y2 if x1 =3D=3D x2 and y1 <=3D= y2. It will probably also work for any combination of y1 and y2 as long as x1 =3D=3D x2. It will probably fail if x1 !=3D x2. --------------enig8191DB18DD6178994DC0EC5A Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFHz/cdldnAQVacBcgRAqKWAKCOzA2oxgl9j6YZJ1JNH4E0ZxItWwCdHF/j 0sBXVdwH2cggqLg6TB1egIA= =Rzx5 -----END PGP SIGNATURE----- --------------enig8191DB18DD6178994DC0EC5A--
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