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[Ap0calypse]

Why is it that when I move a file from one map to another (on the same drive) I get very slow transfer rates (4-5Mbyte/s)?

They are also that slow when I transfer from volume 1 to volume 2.

My hard drive is a seagate ST31000528AS 1TB.

When I transfer from my computer to the nas it goes up to 10-11 Mbytes/s which maybe is normal even though I have gigabit network, I don't know...

any help would be appreciated:)

[TheWitness]

You can not get Gbps transfer rates, the disks are not that powerful, I/O bandwidth wise, first of all, and secondly, the CPU does not have enough horsepower to drive them to full capacity. 

Many people, with EXT3 file systems are getting around 13MBps.  You can get about 25% more using EXT2.

TheWitness

[Ap0calypse]

Ok, so your saying that it is the cpu on the nas that limits everything. But I don't understand why it's slower to move files on the same disk than moving files from my computer to the nas?

[gunrunnerjohn]

If you're doing this move using your computer, you are actually doing two transfers, one from the NAS to your computer from the source volume, and another from your computer to the target volume.  It's not surprising that it would cut the actual transfer bandwidth in half, you're doing the same amount of transfers, just half of them are writes.

[AKFubar]

Yup even with Gigabit and jumbo frames set at 4000 I get a 10 MB/s transfer from Vol 1 to Vol 2 on the DNS-323.

[TheWitness]

For volume to volume, I would logon to the box directly and do the transfer there to avoid bringing the network into the picture.  At that point it's all about disk cache.

TheWitness

[Ap0calypse]

Thanks for all the answers guys. Really appreciate it:)