Bad transfer rates on Goflex Home 2TB with Arch

[baigner]

Hello guys!

Now I've finished the installation of the ARM Archlinux on my GoFlex.
I also installed the smb deamon on it, but I think there are any troubles because of the low transfer speed of 8 MB/s over Gigabit Ethernet (PC-Gigabitswitch-GoFlex)

I think it should be a little bit faster, like 25 MB/s, isn't it?

Greetings!

[WarheadsSE]

The best you are likely to get, including overhead is approximately 21MB/s from what I had seen, when using samba.

This is to the contained 2TB drive correct?
What is the underlying filesystem?
Find a nice spot in your home directory and `dd if=/dev/zero of=~/iotest.img bs=2K count=200` and see how fast you're getting for local writes. (that writes a zero-filled, 400M image file that you can delete later)

[baigner]

21 MB/s would be great^^

the used filesystem is ext3, i am using the 2TB drive, right.
I will go to check the other things tomorrow and will give you a feedback.

[WarheadsSE]

Also of note: my tests were done against a 7200rpm drive.

[baigner]

the result of the command:

[root@alarm share]# dd if=/dev/zero of=~/iotest.img bs=2K count=200
200+0 records in
200+0 records out
409600 bytes (410 kB) copied, 0.0125231 s, 32.7 MB/s

[WarheadsSE]

Ok, so small file sizes that decent, run it again and try upping the count to 2000

This essentially getting a write performance of the filesystem on the disk, which is the absolute theoretical max you could ever possibly get, without overhead of IP or SMB. (and they are going to eat at least a few MB/s)

[baigner]

count of 2000
[root@alarm share]# dd if=/dev/zero of=~/iotest.img bs=2K count=2000
2000+0 records in
2000+0 records out
4096000 bytes (4.1 MB) copied, 0.0697103 s, 58.8 MB/s

[WarheadsSE]

Well I gave it a shot on my GoFlex Net, and it averaged around 12MB/s over samba to an ext3 partition with a 2GB file

[baigner]

Ist it possible to get some higher transfer rates by any other protocol or something else (i think it won't help to format it EXT4)

[WarheadsSE]

nfs is less expensive