Best solution for copy/transfer 2.5Tb of Data

[cocolocko]

Hi @ all,

can someone tell me the best solution to connect 2 NAS Systems (both had ZFS with 8GB RAM), FreeNAS v0.7 with the 2.5Tb of Data and a New installed NAS4Free rev. 175, to copy the the data fom the old to the new system over gigabit ethernet?
I tried it over NFS with cp command, but it fails and hang, after it, i tried it with NFS and rsync but this fails also and hang.
So, are there some other suggestions for me?
Thank you

Greetings

[Onichan]

Plug both NAS's into a switch with a computer and map both NAS's to the computer and copy that way?

[cancerman]

rsync and ftp?

[kernow]

I'd do it in smaller chunks, directory and a few hundred gigs at a time.

[sjordan]

Zfs send can do it as well.i copied 3tb over

[raulfg3]

You need to tune one or both NAS to avoid hangs, once tunned You can copy using NFS, SMB, FTP, and so on.

To tune, first install zfskerntune and configure it for your RAM, You can enable "tunning of some kernel variables" too.

[lux]

You can enable "tunning of some kernel variables" too.

i don't suggest that...

for me up/download speed's go down with enabling...