I was watching an HD movie from the Thecus 7 Mbit/s so .. less than 1MB sec read, then I was copying files to the thecus and the movie was un-watchable .. in SMB. Stopping all the time.
Then I copy files to the thecus from iTunes, transfer rate detected by Activity Monitor, 1.6MB/s ... crazy ... this is AFP.
Then I did a test. copied 1GB to the unit from my mac. My mc has Gigabit ethernet. When I had 1 disk on the thecus I did a test so here are the numbers: Transfer TO the Thecus from iMac gigabit: 1 disk no raid 21 sec - 47MB/s 5 disks raid 5 90 sec - 11MB/s
the transfer stops after a few sec, then it starts again, and so on .... I mean .. is anybody able to help me here? ... thanx guys ...
What F/W version is your N5200PRO? Do you have any other machines to do a comparison test? Can you try to connect to N5200PRO using SMB instead of AFP on your iMAC? Is your N5200PRO using static IP or DHCP? What disks are you using?
PS: If it is an question, then it should go into Installation board.
Post by henkhavelaar on Jan 24, 2008 5:15:06 GMT 7
Yes, the unit is very slow. I decide to buy a N5200 Pro because the tests defined the unit as a fast one but my wright speed is about 6 MB/Sec, read speed is lower, about 2 MB/sec, I don't understand! I have 5 Samsung T166 500 GB in raid 5 array, all gigabit ethernet. Normal copy from PC to PC is about 65 MB/sec. Jumbo frame is set to 4000 bytes, all of the NIC's use this setting
For most of us the N5200 is really fast..... at least for me
I've posted several benchmarks in this forum, please search for it.
Please always mention what protocol do you use when reporting benchmarks. The speed also depends on the protocol and because the N5200 supports different protocols (FTP, CIFS, NFS, RSYNC, SSH, AFS, etc.) it is not clear which one you did use.
If you have performance issues, they are most likely due to network problems or incompatibilities.
One good idea is to test the basic network performance without access to the hard disks.
I've created a module for this called IPERF (onbeat.dk/thecus/index.php/N5200_Module:_IPERF) which install and starts an IPERF daemon waiting for TCP or UDB connections. You need to download and run the client software on your Windows or Linux computer. The client connect to the server and does a bunch of benchmarks. You can find more information on the module page and here: dast.nlanr.net/Projects/Iperf.
Problems can be caused by wrong usage of Jumbo frames, wrong speed auto-negotiation and mismatching duplex settings, wrong MTU settings and problems with switches and their configuration. Cabling is sometimes an issue too.
So try the IPERF benchmarks first and post your results....
I can validate that Jumbo Frames can be a real problem in slowing down the Thecus 5200 Pro on a Gb LAN if not implemented properly. I was experimenting with Jumbo Frames at one point, set most of my network devices to support Jumbo, but I had a few 100Mb devices that don't do jumbo.... so I tried it anyway hoping my Gb switch would handle the non-jumbo devices. Well it seemed to work for a week or so....or so I thought. While copying movie files to the Thecus one day I noticed really bad performance on both write and reads. After scratching my head for a while it dawned on me that jumbo was enabled. Sure enough, disabled jumbo frames on all devices and performance was back to being really good.
Post by henkhavelaar on Mar 10, 2008 4:04:10 GMT 7
I have changed the configuration, replaced the HD's for 5 Hitachi 1TB drives and connected the network to the WAN port, speed is no average read 42 MB/Sec and write 36 MB/sec. Jumbo frame's still on 4000 for the complete network. So much better but the greatest improvement was changing the network connection from LAN to the WAN port.