From owner-freebsd-questions@FreeBSD.ORG Sun Sep 30 05:49:58 2012 Return-Path: Delivered-To: questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 2F9431065670 for ; Sun, 30 Sep 2012 05:49:58 +0000 (UTC) (envelope-from jguojun@sbcglobal.net) Received: from nm19.bullet.mail.sp2.yahoo.com (nm19.bullet.mail.sp2.yahoo.com [98.139.91.89]) by mx1.freebsd.org (Postfix) with ESMTP id 048698FC14 for ; Sun, 30 Sep 2012 05:49:57 +0000 (UTC) Received: from [98.139.91.64] by nm19.bullet.mail.sp2.yahoo.com with NNFMP; 30 Sep 2012 05:49:57 -0000 Received: from [98.139.44.92] by tm4.bullet.mail.sp2.yahoo.com with NNFMP; 30 Sep 2012 05:49:56 -0000 Received: from [127.0.0.1] by omp1029.access.mail.sp2.yahoo.com with NNFMP; 30 Sep 2012 05:49:56 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 985738.20554.bm@omp1029.access.mail.sp2.yahoo.com Received: (qmail 39815 invoked by uid 60001); 30 Sep 2012 05:49:56 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sbcglobal.net; s=s1024; t=1348984196; bh=YiwQWfvxWsp1stoutLoImftzYzhQPymriWyuS+mM1dc=; h=X-YMail-OSG:Received:X-Mailer:Message-ID:Date:From:Subject:To:Cc:MIME-Version:Content-Type; b=P/jlutymmw3cg3lQF/aSwIVWa55lL6p6ssGegfmR9tba6oMiTEOiXwZtOZ+bY8ROxSisnc2z9gr/AkiRKCh917sq7kBegrjSoO55nBaVaMcFjqVOBC8H+qIfi/TyaOqfKWkO1VjNd46l2LfMElL/oyZQdXebJ+zfVtzHFXZQ6tk= DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=sbcglobal.net; h=X-YMail-OSG:Received:X-Mailer:Message-ID:Date:From:Subject:To:Cc:MIME-Version:Content-Type; b=46PE/iuFpfbI/GzmbIuARs8d/Isuah+qsjNF8MHcfh4M/FnFZ0JdU4lsHWl/b7kaQEbXPbjbl+VeHyNgv9D6FdoeJiCjfV5On14Qbg9cUaHgGdoQrn4W0IczYI0VsJMhgtpxCJWRWI4k8Vie3R/MtjkjWf+k6MyXPmsD9sFTI8k=; X-YMail-OSG: kSrPtgsVM1nKsPKHmxxDXJpYKe.YQs5Kbx4MHSqZmNuajOF 1ZYtvsvQIeHvw6h6spX4Yts9goE8NNj48gE3Ucbb16w2g23jPU_hBdK0DVO2 UbwHkGZd4xQXf03yzI2scGnrJqahLUJaLzjfCap2DD3H2ShxONc2fPebUjbt xMcH6rZDiu33c1hj8_JzPKM3etebjTB9MrIdcp6RTW8m1LHbvctzeNK32rs3 hIkorC_RKuy4AcxAqn0vAFjh3b.3AVbr_5UbJcsPzkds82C9T2L2vPS7rRD1 _wz7nOx5uv0dzBIV6j_5r9cdqlBctR.nxgQj5jHr4hxNw_ZJ2LADp0mwtRJm WvtofBbPQu4VVgZYEw9ic.4ltA4A6vFLtysfTsoccups56ydvhWixFIQCBjr _JCOo_IhBNzoVom8HcULBmxcJ.BqNl02ijf__EoBv8t3vdkRY5dJFV5KWbPf fyTx8wOyeaYrvjep2lCKuxyIJaIDoMr3zautKXnNxC36qLMXZ.2RwhxZMAFE VfNzrUJ0- Received: from [75.37.1.111] by web180906.mail.ne1.yahoo.com via HTTP; Sat, 29 Sep 2012 22:49:56 PDT X-Mailer: YahooMailRC/708 YahooMailWebService/0.8.121.434 Message-ID: <1348984196.37002.YahooMailRC@web180906.mail.ne1.yahoo.com> Date: Sat, 29 Sep 2012 22:49:56 -0700 (PDT) From: Jin Guojun To: questions@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: hackers@freebsd.org Subject: system hangs during dump + compress > usb2-drive 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: Sun, 30 Sep 2012 05:49:58 -0000 In FreeBSD 8.3 release (possibly in earlier release), dump a file system has 2-3GB or more content can cause system hang in a specific case (pipe to compression): dump FS-on-SATA-drive > usb-drive OK dump FS-on-SATA-drive | anyCompress > sata-drive OK mv a-large-dump-file from STAT drive to a USB drive OK dump small-FS-on-SATA-drive | anyCompress > usb-drive OK small -- 1.8GB or less dump large-FS-on-SATA-drive | anyCompress > usb-drive hang content is 3GB or larger (did not try around 2GB yet) When system hangs, no sub system, such video, network, etc, will function. Typically, the unfinished compressed dump file is around 1.5-2.7GB, so guessing dumped file content is close to or over 2GB when failure occurred. Has anyone encountered the same problem? Because this usually takes a few hours to occur, this is hard to watch how/when it happens. Is any way to debug or determine what status the system is? -Jin