DNS-320 Slow transfer speeds. Tested with different filesystems and devices

[Atif]

I'm using a single disk in non RAID standalone mode to test the transfer speed over a 1 Gbps connection via SMB

When I transfer between two PCs I get transfer speeds around 73 - 83 MBps over both SSD and 5400 RPM HDDs

When I transfer between PC and NAS with drive formatted as ext 4 . I get a read speed of 28 MBps from NAS and 16 MBps write to NAS

When I transfer between PC and NAS with drive formatted as NTFS . I get a read speed of 17 MBps from NAS and 4 MBps write to NAS

• Why is throughput to/from NAS so slow compared to two PCs ?
  
• Why is there a huge throughput difference between disk formatted as NTFS and ext4. My PCs drives are NTFS and they are fast as listed above ?
  

[slowpoke]

It's been discussed a few times. Basically the DNS-320 has a gigabit port but the weak CPU and low RAM limit the speed a lot. I get about the same speed as your ext 4 transfers even in RAID 1.

https://groups.google.com/forum/#!searchin/alt-f/slow$20speed|sort:date/alt-f/4lOxHFV4HLs/aKODThZz7UsJ

From the FAQ: https://sourceforge.net/p/alt-f/wiki/Alt-F%20FAQ/#faq19

Why is it so slow?
The DNS-323 has a low-end hardware:
-The CPU runs at 500MHz, your PC probably runs at 3GHz, 6 times faster
-The CPU is single core, your PC has probably four cores, 4 times faster
-The CPU has no L3 cache memory, your PC has probably 8MB
-The box has 64MB of memory, your PC has probably 4GB, 64 times more
-The box memory runs at 166MHz, your PC memory probably runs at 1.3GHz, 7 times faster
All this "sums" up and your PC is probably 100 times overall faster that your DNS-323. See also this and this.