From owner-freebsd-drivers@freebsd.org Wed Mar 16 06:06:10 2016 Return-Path: Delivered-To: freebsd-drivers@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 7748EAD1C8A for ; Wed, 16 Mar 2016 06:06:10 +0000 (UTC) (envelope-from prateekrootkey@gmail.com) Received: from mail-vk0-x22c.google.com (mail-vk0-x22c.google.com [IPv6:2607:f8b0:400c:c05::22c]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 409551C66 for ; Wed, 16 Mar 2016 06:06:10 +0000 (UTC) (envelope-from prateekrootkey@gmail.com) Received: by mail-vk0-x22c.google.com with SMTP id e185so49412834vkb.1 for ; Tue, 15 Mar 2016 23:06:10 -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; bh=oxbP+kIyuj/v6E32dos/rExzfSAa+BoIfS6IePex/gM=; b=fWvXVvSKgVHUDTM0XdYpNqIRUIGhr6bHxiLyYNXlAkV1SuIt/6A/5e/E4Cb1jKJL9v BwwX9vDvuJSUlFOaEuyGRomJdnkGnw4YkSDQGNbaSvK2QC1DMhwy4YGYDJo10/YbXGgs CmvKXoIUVR5QAVCD/wWU1ivXAjCib9xc8nz1vCDIr6tD2LegP4WjSiT+Bt012TT9r8WP d21h3S4Muzh06Urw88zn7nDTl+MKhzo5J5ZmogWX+B+afu+VjsiBlKeWRBHS4PlToXQ9 vw41GxbGjuFbCeFtt3iLk0VPmKwmI2kLmFVPvggAkxvMQ/EkPaxSC9ANUGQ4nGzr1csJ jJeQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=oxbP+kIyuj/v6E32dos/rExzfSAa+BoIfS6IePex/gM=; b=LR+4onckYbbSPXap8lYGjz8EmKnHaWc0V8BkPNdXiLR+hBKrUVKC1n7btLAZNtFQms knRHsHmWOyeR3w66gtkxD3gZPHrfcUwDX2vsiTG7tE9yjmOTy0NZ4KYa6RpHa4flnMbb vt7wn8P+WEsEwltFeIHTNdDFTOgEDp7dOQSH9jAgB/8ZEsI/5mNVLKlXouNnV/0V2Orx 3U0xSclGXx2M6dlPTsCQVIVcl94LVFREyhMEqc07gdJ/YH2jkeeKQ+lZmu3HhYH4h3o0 qev/Nw/lkYgFktZOdaRQJm3bxH4Nf9BizX+pRqp71VyTC7JJ5CzTcZhK2bUH7Sf0Mc4d tIUQ== X-Gm-Message-State: AD7BkJJUWENOipiqf4Ak8VQqD5EYiGGZbDkyatWV9ovygP7LxLdT2H5GyzsoWx5858MZBl0Xv32K0sjUgNq85w== MIME-Version: 1.0 X-Received: by 10.31.10.199 with SMTP id 190mr2326475vkk.51.1458108369238; Tue, 15 Mar 2016 23:06:09 -0700 (PDT) Received: by 10.176.7.68 with HTTP; Tue, 15 Mar 2016 23:06:09 -0700 (PDT) Date: Wed, 16 Mar 2016 11:36:09 +0530 Message-ID: Subject: CDB error terminate reasons and solutions From: prateek sethi To: freebsd-drivers@freebsd.org Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.21 X-BeenThere: freebsd-drivers@freebsd.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Writing device drivers for FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Mar 2016 06:06:10 -0000 kernel: (da152:mps1:0:170:0): WRITE(10). CDB: 2a 00 31 f8 a3 42 00 00 08 00 length 4096 SMID 339 *terminated* ioc 804b scsi 0 state c xfer 0 Terminated errors are very common in logs and it assumes that it will be transient but I have seen cases where these errors persist more then a day . Because these IOPS will retry without decrementing the retry count , commands can hang or can take very much time. So my questions are:- What all the reasons can be for such kind of issues? what are the ways to fix these issues?