From: "Justin Piszcz" <jpiszcz@lucidpixels.com>
To: "'LKML'" <linux-kernel@vger.kernel.org>,
<linux-usb@vger.kernel.org>, <linux-scsi@vger.kernel.org>
Subject: 5.2.x kernel: WD 8TB USB Drives: Unaligned partial completion (resid=78, sector_sz=512)
Date: Sat, 3 Aug 2019 05:10:44 -0400 [thread overview]
Message-ID: <006d01d549db$54e42140$feac63c0$@lucidpixels.com> (raw)
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]?
[1] https://patchwork.kernel.org/patch/9573203/
[2] https://patchwork.kernel.org/patch/9597797/
Part of the patch in [2] - if the firmware is buggy is there a patch or
workaround for these drives (when used in the USB enclosures) to avoid this
issue?
+ default:
+ /*
+ * In case of bogus fw or device, we could end up having
+ * an unaligned partial completion. Check this here and
force
+ * alignment.
+ */
+ resid = scsi_get_resid(SCpnt);
+ if (resid & (sector_size - 1)) {
+ sd_printk(KERN_INFO, sdkp,
+ "Unaligned partial completion (resid=%u,
sector_sz=%u)\n",
+ resid, sector_size);
+ resid = min(scsi_bufflen(SCpnt),
+ round_up(resid, sector_size));
+ scsi_set_resid(SCpnt, resid);
+ }
Errors:
Jul 18 16:25:02 name kernel: [87305.605993] sd 8:0:0:0: [sdg] Unaligned
partial completion (resid=78, sector_sz=512)
Jul 18 16:25:02 name kernel: [87305.605993] sd 8:0:0:0: [sdg] Unaligned
partial completion (resid=78, sector_sz=512)
Jul 18 16:25:15 name kernel: [87318.292262] sd 7:0:0:0: [sdf] Unaligned
partial completion (resid=78, sector_sz=512)
Jul 18 16:25:15 name kernel: [87318.292262] sd 7:0:0:0: [sdf] Unaligned
partial completion (resid=78, sector_sz=512)
next reply other threads:[~2019-08-03 9:11 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-03 9:10 Justin Piszcz [this message]
2019-08-03 11:36 ` 5.2.x kernel: WD 8TB USB Drives: Unaligned partial completion (resid=78, sector_sz=512) Markus Reichelt
2019-08-03 19:00 ` Alan Stern
2019-08-03 19:37 ` Justin Piszcz
2019-08-08 2:03 ` Martin K. Petersen
2019-08-08 8:27 ` Justin Piszcz
2019-08-13 2:12 ` Martin K. Petersen
2019-08-13 3:47 ` Damien Le Moal
2019-08-13 10:48 ` Damien Le Moal
2019-08-13 20:58 ` Justin Piszcz
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