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To:     "Justin Piszcz" <jpiszcz@lucidpixels.com>
Cc:     "'Martin K. Petersen'" <martin.petersen@oracle.com>,
        "'LKML'" <linux-kernel@vger.kernel.org>,
        <linux-usb@vger.kernel.org>, <linux-scsi@vger.kernel.org>,
        Damien Le Moal <Damien.LeMoal@wdc.com>
Subject: Re: 5.2.x kernel: WD 8TB USB Drives: Unaligned partial completion (resid=78, sector_sz=512)
From:   "Martin K. Petersen" <martin.petersen@oracle.com>
Organization: Oracle Corporation
References: <006d01d549db$54e42140$feac63c0$@lucidpixels.com>
        <yq1ftmcct1j.fsf@oracle.com>
        <002d01d54dc3$17c278c0$47476a40$@lucidpixels.com>
Date:   Mon, 12 Aug 2019 22:12:42 -0400
In-Reply-To: <002d01d54dc3$17c278c0$47476a40$@lucidpixels.com> (Justin
        Piszcz's message of "Thu, 8 Aug 2019 04:27:18 -0400")
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Justin,

>> Attached 2 x brand new Western Digital 8TB USB 3.0 drives awhile back
>> and ran some file copy tests and was getting these warnings-- is
>> there any way to avoid these warnings?  I did confirm with parted
>> that the partition was aligned but this appears to be something
>> related to the firmware on the device according to [1] and [2]?

> sg_vpd_bdc.txt
> Block device characteristics VPD page (SBC):
>   Nominal rotation rate: 5400 rpm
>   Product type: Not specified
>   WABEREQ=0
>   WACEREQ=0
>   Nominal form factor: 3.5 inch
>   ZONED=0

Damien: What can we do to limit the messages in cases like this? Would
it make sense to make the residual warning conditional on sd_is_zoned()?

-- 
Martin K. Petersen	Oracle Linux Engineering