From: Wolfgang Breyha
> Sent: 08 September 2016 16:32
> David Laight wrote on 08/09/16 15:30:
> > Try with raw writes to the disk, rather than going through the filesystem.
> > That will remove effects caused by the alignment of the filesystem and the
> > size of the filesystem blocks.
>
> Ok, I did
> dd if=768MB.test of=/dev/sdb oflag=direct bs=1M
> dd if=/dev/sdb bs=1M count=768 iflag=direct|sha1sum
> with the differently sized files from before (and a 2GB file) now...
>
> I wrote them all once and the larger files (768MB, 2GB) multiple times, but
> only the 768MB and the 2GB file failed once yet:
Try writing with:
dd if=768MB.test of=/dev/sdb oflag=direct bs=1M seek_bytes seek=$((n*512))
for several small values of 'n' so that the writes are misaligned.
It may also be worth finding out what the USB transfers look like.
David
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
