WD My Cloud - Transfer rate expected

Hi, 

I received today my WD MyCloud and -excited- wanted to transfer data (bunch of pics) on my WD My Cloud. 

Being happy to use this NAS, I started transferring my pictures using rsync… The pictures were on a 5400 WD My Passport Ultra (USB 3.0 - formatted in FAT32). 

To my surprise, rsync was quite low. See below : 

rsync -r --progress DRIVE_FAT1/2014 /shares/Photo/

sending incremental file list

2014/2013/2013-03-29/P1100617.RW2

    19811328 100%    8.12MB/s    0:00:02 (xfer#1, to-check=1439/1499)

2014/2013/2013-03-29/P1100618.RW2

    19619328 100%    6.68MB/s    0:00:02 (xfer#2, to-check=1438/1499)

2014/2013/2013-03-29/P1100619.RW2

    19699200 100%    6.17MB/s    0:00:03 (xfer#3, to-check=1437/1499)

2014/2013/2013-03-29/P1100620.RW2

    19683328 100%    6.03MB/s    0:00:03 (xfer#4, to-check=1436/1499)

2014/2013/2013-03-29/P1100621.MOV

    15696446 100%    5.00MB/s    0:00:02 (xfer#5, to-check=1435/1499)

2014/2013/2013-03-29/P1100622.RW2

    19644928 100%    6.27MB/s    0:00:02 (xfer#6, to-check=1434/1499)

2014/2013/2013-03-29/P1100623.RW2

    19645440 100%    6.17MB/s    0:00:03 (xfer#7, to-check=1433/1499)

2014/2013/2013-03-29/P1100624.RW2

    19496448 100%    6.33MB/s    0:00:02 (xfer#8, to-check=1432/1499)

2014/2013/2013-03-29/P1100625.RW2

    19442688 100%    6.38MB/s    0:00:02 (xfer#9, to-check=1431/1499)

2014/2013/2013-03-29/P1100626.RW2

Been surprised by the low transfer rate, I decided to transfer a bigger file 

rsync DRIVE_FAT1/testbigfile.txt /shares/Public/ --progress

testbigfile.txt

   732688460 100%   11.17MB/s    0:01:02 (xfer#1, to-check=0/1)

date; cp -rf DRIVE_FAT1/testbigfile.txt /shares/Public/Shared\ Pictures/; date

Mon Jul 14 07:54:34 PDT 2014

Mon Jul 14 07:54:53 PDT 2014

19sec  so approximately 36.77 MB/s (rsync is 3 times slower, so I guess it’s due to read/write overhead that rsync do)

–> Is it expected to see these transfer rates ? I would have expected more in USB 3.0. WD MyCloud can’t keep up ?

Any update here ? 

Is it expected to see such performances ?

Current data 

Write : 

time sh -c “dd if=/dev/zero of=speetest bs=1M count=6400 conv=fdatasync”

dd: writing `speetest’: No space left on device

1067+0 records in

1066+0 records out

1118502912 bytes (1.1 GB) copied, 30.2596 s, 37.0 MB/s

real0m31.191s

user0m0.010s

sys0m13.530s

Read : 

for i in [1…3]; do hdparm -tT /dev/sda4; done

/dev/sda4:

 Timing cached reads:   474 MB in  2.00 seconds = 236.85 MB/sec

 Timing buffered disk reads: 300 MB in  3.01 seconds =  99.66 MB/sec

JossWD1:~# for i in {1…5}; do hdparm -tT /dev/sda4; done

/dev/sda4:

 Timing cached reads:   510 MB in  2.00 seconds = 254.91 MB/sec

 Timing buffered disk reads: 302 MB in  3.01 seconds = 100.46 MB/sec

/dev/sda4:

 Timing cached reads:   516 MB in  2.00 seconds = 257.54 MB/sec

 Timing buffered disk reads: 342 MB in  3.02 seconds = 113.11 MB/sec

/dev/sda4:

 Timing cached reads:   514 MB in  2.00 seconds = 256.98 MB/sec

 Timing buffered disk reads: 250 MB in  3.01 seconds =  83.13 MB/sec

I am impressed by the read (250MB/s) but the write is only 37.0 MB/s. Is that expected ? ( http://www.tomshardware.com/charts/hdd-charts-2013/-05-Write-Throughput-Maximum-h2benchw-3.16,2903.html))

I have checked and the disk is a WD RED 3TB 5400 rpm