I finally bought a Asrock Q1900DC.
Power adapter 90W
RAM : 4GB (1DIMM)
2x3TB WD RED
Windows 8.1 Pro on a WD Black 2,5" 7200tr/min (not my first choice, but impossible to boot on USB 3.0 stick Windows To Go, i don't know why ...)
Nanoboot with VMware Workstation 11, RAM : 1,5GB
2xTB WD RED setup in SATA / physical drive
RAID 0 With DSM
Ethernet cables are 5e
Zyxel EMG2926 router
I can use it for both HTPC (important for me) and NAS.
But when I write on NAS (W7 PC, Gigabit, with SSD ==> NAS, big file >5GB) speed is "only" ~ 60MB/s (max 70). HTPC not "active" of course.
NAS ==> PC : 30MB/s
I tried with 2 PCs W7, same result.
(With 1 disk, PC==NAS, speed is 50-55MB/s
NAS ==> PC, 30MB/s)
I tried this command :
time dd if=/dev/zero of=/volume1/bigfile bs=64k count=65536
Result : 15,37s ==> 266,5 MB/s
time dd if=/volume1/bigfile of=/dev/null
Result : 15,91s ==> 257,5 MB/s
I really don't understand why speeds are so slow with SMB...
Does anyone have an idea?
Bad setup in VMware ?
Thanks for your help !
EDIT : same results (exactly) with FTP