From owner-freebsd-questions@FreeBSD.ORG Mon Aug 5 15:12:02 2013 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id 9C00EB78 for ; Mon, 5 Aug 2013 15:12:02 +0000 (UTC) (envelope-from dieterbsd@gmail.com) Received: from mail-oa0-x244.google.com (mail-oa0-x244.google.com [IPv6:2607:f8b0:4003:c02::244]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 6BB5C222D for ; Mon, 5 Aug 2013 15:12:02 +0000 (UTC) Received: by mail-oa0-f68.google.com with SMTP id j6so2804062oag.7 for ; Mon, 05 Aug 2013 08:12:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=LpDVxSQ0SZ6NgdTF0p1PNm7oZRHDcFj48HydeRVikSM=; b=fECiokdcs7ORjscp33P9oGPLai8gvApmuFueOkrbdPpW/mrrbHJoptqMPkW8Euik1e zXJAYuRJcLf4KNQvrTLCA2a7klta+Uu8/udYGF76aehUMBlymxOXLfFIrSC0W87unBDP H+Ao5hkOJhrxZ+jsT3FWvh5+xoEzNnHJ3DIIImPRXISvEIrWQv2Ndu6VD5mfzcbqkf2G lyyXWS5mYlZeKxMwDFrTLVOjq6OEeFfCLGOHWbAYTiIaszHrneM/T8B9JM+K7JXYht3O 3P2M+o4DoG9FK9OlscWu2EGAylvY1TBDSaddwrNl/a3/a9GwiQ744RaNd5pXpe8NQYg4 LW5Q== MIME-Version: 1.0 X-Received: by 10.50.129.68 with SMTP id nu4mr1136198igb.9.1375715521602; Mon, 05 Aug 2013 08:12:01 -0700 (PDT) Received: by 10.64.246.134 with HTTP; Mon, 5 Aug 2013 08:12:01 -0700 (PDT) Date: Mon, 5 Aug 2013 08:12:01 -0700 Message-ID: Subject: Re: disk is AWOL From: Dieter BSD To: freebsd-questions@freebsd.org Content-Type: text/plain; charset=ISO-8859-1 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 05 Aug 2013 15:12:02 -0000 >> 8.2 amd64 >> ad8 is a 3TB Seagate on nforce4-ultra controller >> >> At boot: >> ad8: 2861588MB > at ata4-master UDMA100 SATA 3Gb/s >> DEBUG g_part_gpt.c gpt_read_hdr() ad8 succeeded with pp->>sectorsize=512 >> >> An hour later: >> # dd if=/dev/ad8 bs=4k count=1 of=/dev/null >> dd: /dev/ad8: No such file or directory >> >> BUT: there was no "ad8: FAILURE - device detached" or similar message >> on the console, in dmesg, or in /var/log/*. The disk just disappeared >> without a peep from the kernel. What's going on? Frank writes: > Is this repeatable? Does it appear when you reboot and then vanish > after a period of time? The disk reappeared after a reboot, and is still there working fine (both read and write) after over 21 hours. > At boot, what does "atacontrol list" say, Before reboot: ATA channel 4: Master: no device present Slave: no device present After reboot: ATA channel 4: Master: ad8 Serial ATA II Slave: no device present (It shouldn't even report a slave for the SATA ports, since SATA doesn't *have* slaves.) > and what about before and after you've tried to read from the drive? No change, even after being up over 21 hours.