Help needed- v slow windows 7 file transfer w/readynas Duo

Psilonaught · 5 Oct 2010 at 22:49

not posted on here on a long time...but i was hoping someone technical could help me out

I have a windows 7 laptop and am using a netgear readynas duo. When connected to my O2 router via a cat cable or if I transfer wireless on my XP laptop I get good file transfer speeds.

If i try with my windows 7 machine i get around 300Kb/s which is crazy

There seems to be a lot of talk on the web about this issue and that the MTU needs to be changed to something lower than 1500. Have tried that and it has made no difference. I was also told to disable MTU autotuning on windows, again done that made no difference

anyone got any suggestions?

vsmora · 6 Oct 2010 at 05:00

Try testing speeds when transferring via FTP instead of regular shared folder. If speeds go back to normal then I'd suspect it is to do with SMB. Vista/7 support newer versions of SMB than XP. Maybe investigate if you can force SMB v1 on the NAS and/or W7. Some W7 apps can interfere with SMB too.

lurkio · 6 Oct 2010 at 08:08

I too have experienced this with few windows 7 machines and copying files
I can only assume it is some new feature of win 7 "slow copy mode"

Psilonaught · 6 Oct 2010 at 08:12

vsmora said:
Try testing speeds when transferring via FTP instead of regular shared folder. If speeds go back to normal then I'd suspect it is to do with SMB. Vista/7 support newer versions of SMB than XP. Maybe investigate if you can force SMB v1 on the NAS and/or W7. Some W7 apps can interfere with SMB too.

Ok will do that, what does smb mean?

vsmora · 7 Oct 2010 at 02:24

SMB = Server Message Block, the protocol used by Win for file sharing. The equivalent thing on Linux (as used by most NAS) is Samba, which allows filesharing access between the different OSes. Reason for suggesting FTP is because it bypasses SMB/Samba; it is also a simpler protocol which often allows the best performance that a device is capable of, so is a good basis for performance/compatibility testing.

Knubje · 18 Oct 2010 at 15:40

Just out of interest I came across this earlier whilst trying to help a friend with his issue. He has W7 64b on both machines 1GB LAN.

Essentially one machine to another transfers fine. The other back to his machine was dog slow (100kb/s max).

He tried many alternatives but no luck.

We turned on Jumbo Packets (9014 Bytes or 9KB) on his machine in the REALTEK Network Adapter settings and it has fixed the issue. Search "Enable Jumbo Packets" in google for more comprehensive guide.