From owner-freebsd-hackers Thu Feb 7 10: 9: 3 2002 Delivered-To: freebsd-hackers@freebsd.org Received: from moebius2.Space.Net (moebius2.Space.Net [195.30.1.100]) by hub.freebsd.org (Postfix) with SMTP id 0248137B41C for ; Thu, 7 Feb 2002 10:08:51 -0800 (PST) Received: (qmail 89784 invoked by uid 1013); 7 Feb 2002 18:08:49 -0000 Date: Thu, 7 Feb 2002 19:08:49 +0100 From: Markus Stumpf To: Dan Nelson Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: dump(8) race conditions? Message-ID: <20020207190849.B87994@Space.Net> References: <20020207185052.A87994@Space.Net> <20020207175402.GA79258@dan.emsphone.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <20020207175402.GA79258@dan.emsphone.com>; from dnelson@allantgroup.com on Thu, Feb 07, 2002 at 11:54:02AM -0600 Organization: SpaceNet AG, Muenchen, Germany X-PGP-Fingerprint: 66 F3 75 79 01 D0 B8 5F 1A C7 77 88 4A B6 70 DF Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Thu, Feb 07, 2002 at 11:54:02AM -0600, Dan Nelson wrote: > Dump should ideally be run on an unmounted filesystem. The next best > is to create a snapshot ( /usr/src/sys/ufs/ffs/README.snapshot ) and > dump that. True. But on systems that host e.g. mailservers or webservers its unacceptable to disrupt services tp umount and backup the system :/ $ uname -a FreeBSD 4.4-RELEASE $ more /usr/src/sys/ufs/ffs/README.snapshot /usr/src/sys/ufs/ffs/README.snapshot: No such file or directory :-))) Located it in stable, but the READNE says: 2) Run dump on the snapshot. You will get a dump that is consistent with the filesystem as of the timestamp of the snapshot. Note that I have not yet changed dump to set the dumpdates file correctly, so do not use this feature in production until that fix is made. :-(( Anyway, I have no problem with the errors per se, just wanted to know if they could result from the race conditions or if I have to better change the disks. \Maex -- SpaceNet AG | Joseph-Dollinger-Bogen 14 | Fon: +49 (89) 32356-0 Research & Development | D-80807 Muenchen | Fax: +49 (89) 32356-299 "The security, stability and reliability of a computer system is reciprocally proportional to the amount of vacuity between the ears of the admin" To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message