Comment 70 for bug 624510

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Thadah Denyse (juchuf) wrote :

The issue has appeared on Ubuntu 16.04 with the 4.4.0-28-generic kernel. When doing

sudo hdparm -tT /dev/sde

/dev/sde:
 Timing cached reads: 8598 MB in 2.00 seconds = 4302.13 MB/sec
 Timing buffered disk reads: 56 MB in 3.11 seconds = 18.03 MB/sec

Everything seems fine, but when writing into the USB drive the writing speed falls down to 9.34KB/s