linux-kernel - Re: 5.2.x kernel: WD 8TB USB Drives: Unaligned partial completion (resid=78, sector

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Date:   Tue, 13 Aug 2019 10:48:43 +0000
From:   Damien Le Moal <Damien.LeMoal@....com>
To:     "Martin K. Petersen" <martin.petersen@...cle.com>,
        Justin Piszcz <jpiszcz@...idpixels.com>
CC:     'LKML' <linux-kernel@...r.kernel.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>
Subject: Re: 5.2.x kernel: WD 8TB USB Drives: Unaligned partial completion
 (resid=78, sector_sz=512)

On 2019/08/12 19:12, Martin K. Petersen wrote:
> 
> 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()?
> 

Justin,

Can you send the output of "lsscsi" for these drives ? I need the exact disk
model ref name and FW version to see if there is an update for this problem, if
it is a known one. If it is not, I will signal it and get a fix started.

Best regards.

-- 
Damien Le Moal
Western Digital Research