From owner-freebsd-scsi@FreeBSD.ORG Mon Jan 6 22:01:26 2014 Return-Path: Delivered-To: freebsd-scsi@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 7AF9D100 for ; Mon, 6 Jan 2014 22:01:26 +0000 (UTC) Received: from mail-qe0-x22e.google.com (mail-qe0-x22e.google.com [IPv6:2607:f8b0:400d:c02::22e]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 3924F1EB0 for ; Mon, 6 Jan 2014 22:01:26 +0000 (UTC) Received: by mail-qe0-f46.google.com with SMTP id a11so18451268qen.5 for ; Mon, 06 Jan 2014 14:01:25 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:date:message-id:subject:from:to:content-type; bh=KiermWVouk+nGTHWfhKwRRb2k8gYaeEmsJpHy8K/494=; b=mwtFZLdgtoiFJiG1iBq0ta6lOtmRMxHAy7uY6YUGy2T4i8l3Th5Rvn7oqpsnwnCu1L 7ZzuguuWTyr6bRnn6Y/D7W+DgcvzxaKhdXqeedenC7wu0gdgH9XPlN0S+a/4LADiyBwU PNOR5SzrhUUbU5f4jXUkwPyzTF57Ok5Ma50z0VxygA4aAbCkcc9efG5NrszAiWfooq+V x1wOy3GP9lXM37aFWKkr0UrzO5bGMAkmHHNLwrtADvTAvraw1m1TYCiKm0QFhQ/aLXl7 QBJnNXwMbShmZt2iTa488b9WvczvbYY47Iu7CW88lqi0xpUJdadi3S/d7le+0qhm5SPL QYPQ== MIME-Version: 1.0 X-Received: by 10.224.3.10 with SMTP id 10mr49808550qal.58.1389045685354; Mon, 06 Jan 2014 14:01:25 -0800 (PST) Sender: benlaurie@gmail.com Received: by 10.96.72.196 with HTTP; Mon, 6 Jan 2014 14:01:25 -0800 (PST) Date: Mon, 6 Jan 2014 22:01:25 +0000 X-Google-Sender-Auth: Z11f52OYjrEvPL-G7Dh5VM5FyDY Message-ID: Subject: Dropped interrupts From: Ben Laurie To: freebsd-scsi@freebsd.org Content-Type: text/plain; charset=ISO-8859-1 X-BeenThere: freebsd-scsi@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: SCSI subsystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 06 Jan 2014 22:01:26 -0000 Not subscribed to the list, so please cc on replies. I'm using Bacula with an LTO-2 SCSI drive. With increasing frequency lately, I've been getting errors like this from bacula: backup-sd JobId 13092: Error: block.c:608 Write error at 23:6772 on device "Ultrium" (/dev/nsa0). ERR=Operation not permitted. Associated with this, I see in dmesg: ahc0: Recovery Initiated [a lot of dump info, including...] ahc0: Timedout SCBs already complete. Interrupts may not be functioning. Interrupts must be kinda functioning, because it can go for weeks at a time without problems. I've looked into it a bit, and the SCSI board is sharing an interrupt with one of the USB hubs. My first thought was to configure it to not use a shared interrupt, but this turns out to be impossible. Could that be the cause? Any suggestions on how to fix this? I believe backups are not actually compromised, but tapes are not filled, which causes some pretty serious problems. Obviously happy to provide any more info that would be helpful.