From owner-freebsd-questions@FreeBSD.ORG Tue Dec 11 15:19:49 2007 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 10E7D16A420 for ; Tue, 11 Dec 2007 15:19:49 +0000 (UTC) (envelope-from valerio.daelli@gmail.com) Received: from nz-out-0506.google.com (nz-out-0506.google.com [64.233.162.224]) by mx1.freebsd.org (Postfix) with ESMTP id 52C6913C459 for ; Tue, 11 Dec 2007 15:19:48 +0000 (UTC) (envelope-from valerio.daelli@gmail.com) Received: by nz-out-0506.google.com with SMTP id l8so810701nzf for ; Tue, 11 Dec 2007 07:19:47 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; bh=qs/PFCExELCLP/vgJVRaimkZFOYls6w+pXiJr0SozfI=; b=PBjC4DaleuR2BlkMoupE9g5E5WyQbvV/EftS7Be4izJNzaloLeb9RlndkUJwu61Kr7jMi2FxTFFk3pXsrVly11eCuM4NVAWOUeXPg9DjZw22cqp8L0RHAzgWLnAZDswGMZGkyj3vvMdCK3yvKv136MkOD6SvRvf8tUCdh6Zx9y4= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=GXO8oUiUu4eaUKTe02EcxVJLuJwn6ZdU1rgJUd1AEhtQEl8lJ6okBVlQpYZRBAxU00KcZ76Jmyqr3C1q69P9ATyjvbAI6iIfPJJEveFiwQ9D0XSHyKJUKv73ftGmERssnbeW2SFqVChebUbLA14td8bZ3eNev4pE2neWLdC2eLg= Received: by 10.142.242.8 with SMTP id p8mr3633255wfh.1197386386309; Tue, 11 Dec 2007 07:19:46 -0800 (PST) Received: by 10.143.158.2 with HTTP; Tue, 11 Dec 2007 07:19:46 -0800 (PST) Message-ID: <27dbfc8c0712110719u74e783a1t9156145badb739c6@mail.gmail.com> Date: Tue, 11 Dec 2007 16:19:46 +0100 From: "Valerio Daelli" To: "=?ISO-8859-1?Q?Javier_Mart=EDn_Rueda?=" In-Reply-To: <475E97E9.5060504@diatel.upm.es> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <27dbfc8c0712060134u3580b5b0v24a7bc3301c05692@mail.gmail.com> <475E97E9.5060504@diatel.upm.es> Cc: freebsd-questions Subject: Re: fsck of big disk X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 11 Dec 2007 15:19:49 -0000 Hi, thanks a lot for your answer. > > we have a freshly installed FreeBSD 6.2 machine with a gstriped external disk, > > of 5.3Tb. The disk is composed of two slices of 2.6 Tb. > > We are trying to have a (background) fsck of it but few hours later > > since the start of the check > > the host get unresponsive: it responds to ping but it doesn't let > > login anyone, nor by ssh > > nor by console. > > > What do you get if you press Control-T on the console when it is > unresponsive? We are not able to login via console nor via ssh. Pheraps you suggest me to press Control-T on the console even if I am not logged on. I did not try, sorry. > > When you do a background fsck there is a point at which a snapshot of > the filesystem is taken, although I'd say that happens at the beginning > of the check. The problem is that with 5.3 Tb, it may take quite a while > to take the snapshot, and during that time the system blocks any process > that tries to write to the filesystem. Maybe that's what you are > experiencing. > What you explained us sounds very interesting. But anyway we simply solved by disabling background fsck on such a big partition. We had panics and reboot and we did not want to risk on a production host. Bye Valerio Daelli