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(dynamic-2jo7hd4gpbva0jmajv-pd01.res.v6.highway.a1.net. [2001:871:25b:80aa:d968:6ff0:1ba6:31eb]) by smtp.gmail.com with ESMTPSA id z6sm19496537wrp.95.2020.03.22.16.22.27 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 22 Mar 2020 16:22:28 -0700 (PDT) Subject: Re: Invalid optimal transfer size 33553920 accepted when physical_block_size 512 To: "Martin K. Petersen" Cc: linux-scsi@vger.kernel.org References: <33fb522e-4f61-1b76-914f-c9e6a3553c9b@gmail.com> <1eb896cd-2be1-4225-88d8-5ee590fe063b@gmail.com> <58904bc3-4186-7f9c-dc3c-707aa3d92bfb@gmail.com> <46035460-9d63-2a9a-d37b-514640f8732f@gmail.com> From: Bernhard Sulzer Message-ID: <44de25f9-2d57-e90d-7773-b060ccd55358@gmail.com> Date: Mon, 23 Mar 2020 00:22:27 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.6.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org > I also attached a quick debug patch for capturing some more info. This is, what I am getting now with both patches applied in order: [  +0.000690] scsi 6:0:0:0: Direct-Access     Seagate Backup+ Hub BK   D781 PQ: 0 ANSI: 6 [  +0.001009] sd 6:0:0:0: Attached scsi generic sg3 type 0 [  +0.000199] sd 6:0:0:0: [sdc] Spinning up disk... [  +0.982900] .. [  +0.300907] ..........ready [Mär23 00:19] sd 6:0:0:0: [sdc] sd_read_capacity: rc10_first 0, rc16_first: 1 [  +0.000068] sd 6:0:0:0: [sdc] read_capacity_16: result 0, retries 2 [  +0.000002] sd 6:0:0:0: [sdc] read_capacity_16: lbs 512, pbs 512, last LBA 3a3812aae [  +0.000236] sd 6:0:0:0: [sdc] 15628053167 512-byte logical blocks: (8.00 TB/7.28 TiB) [  +0.070974] sd 6:0:0:0: [sdc] Write Protect is off [  +0.000002] sd 6:0:0:0: [sdc] Mode Sense: 4f 00 00 00 [  +0.000153] sd 6:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [  +0.000200] sd 6:0:0:0: [sdc] Preferred minimum I/O size 512 bytes [  +0.000001] sd 6:0:0:0: [sdc] Optimal transfer size 33553920 bytes [  +0.020349] sd 6:0:0:0: [sdc] sd_read_capacity: rc10_first 0, rc16_first: 1 [  +0.000094] sd 6:0:0:0: [sdc] read_capacity_16: result 0, retries 2 [  +0.000002] sd 6:0:0:0: [sdc] read_capacity_16: lbs 512, pbs 4096, last LBA 3a3812aae [  +0.021930] sd 6:0:0:0: [sdc] sd_read_capacity: rc10_first 0, rc16_first: 1 [  +0.000079] sd 6:0:0:0: [sdc] read_capacity_16: result 0, retries 2 [  +0.000002] sd 6:0:0:0: [sdc] read_capacity_16: lbs 512, pbs 4096, last LBA 3a3812aae [  +0.000567] sd 6:0:0:0: [sdc] Attached SCSI disk