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Petersen" , Coly Li , linux-block@vger.kernel.org, Jonathan Corbet , Kent Overstreet , "open list\:DOCUMENTATION" , open list , "open list\:BCACHE \(BLOCK LAYER CACHE\)" Subject: Re: [PATCH] bcache: make stripe_size configurable and persistent for hardware raid5/6 From: "Martin K. Petersen" Organization: Oracle Corporation References: <1561245371-10235-1-git-send-email-bcache@lists.ewheeler.net> <200638b0-7cba-38b4-20c4-b325f3cfe862@suse.de> Date: Tue, 25 Jun 2019 22:50:47 -0400 In-Reply-To: (Eric Wheeler's message of "Wed, 26 Jun 2019 00:23:09 +0000 (UTC)") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1.92 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9299 signatures=668687 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=886 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1906260031 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9299 signatures=668687 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=939 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1906260031 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Eric, > * LSI 2108 (Supermicro) > * LSI 3108 (Dell) > * Areca 1882 > * Areca 1883 > * Fibrechannel 8gbe connected to a Storwize 3700 I have a 3108 that provides the BL VPD. Surprised the 1883 doesn't. As a rule of thumb, you need 12 Gbps SAS or 16 Gbps FC devices for the VPD page to be present. The protocol feature is not tied to the transport signaling speed in any way. But general support for the BL VPD page roughly coincided with vendors introducing 12 Gbps SAS and 16 Gbps FC products to the market. -- Martin K. Petersen Oracle Linux Engineering