Post by radu on Oct 12, 2007 15:07:33 GMT 7
Since I would like to get to the bottom of my problem as quik as possible and benefit from the expertise of you guys, I will repost my message from the Thecus support forums on Hexus:
I recently purchased a Thecus N4100+ unit to have set up with 3x WD1600AAJS in RAID5.
After RAID setup I wanted to test the throughput of the unit over a standard 100 Mbps Windows network on which I already have a file server running a Linux distro.
So, a basic 700 MB file copy operation yields only a max of 2 MB/s write speed and a read operation of the same file comes close to a "blazing-fast" 4 MB/s.
The exact same operations done on my current file-server are getting 100% of the time 8 MB/s, close to the maximum throughput of the 100 Mbps network. This current file-server consists of a P4 2.4 GHz with 512 MB of RAM and a RAID 1 config of 2x WD800JB (in short, the storage system gets a theoretical kick in the butt from the RAID 5 N4100+ storage system).
The tests were done with only one computer, one file-server and the Thecus N4100+ in question here. There was no other network traffic at the time of the test. I cannot even imagine what would have happened if the N4100+ unit had to deal with a multiple access scenario.
During the write operation, the CPU utilisation of the Thecus was reported to be at 90~100%, whereas with the read operation it settled at about 30%.
I've read about some similar issues with the N4100+ from a bunch of other users of the same unit and am concearned with this being a serious issue needing to be addressed urgently.
I am very disappointed with the performance of the unit and am looking for an explanation. Can anyone help out?
I recently purchased a Thecus N4100+ unit to have set up with 3x WD1600AAJS in RAID5.
After RAID setup I wanted to test the throughput of the unit over a standard 100 Mbps Windows network on which I already have a file server running a Linux distro.
So, a basic 700 MB file copy operation yields only a max of 2 MB/s write speed and a read operation of the same file comes close to a "blazing-fast" 4 MB/s.
The exact same operations done on my current file-server are getting 100% of the time 8 MB/s, close to the maximum throughput of the 100 Mbps network. This current file-server consists of a P4 2.4 GHz with 512 MB of RAM and a RAID 1 config of 2x WD800JB (in short, the storage system gets a theoretical kick in the butt from the RAID 5 N4100+ storage system).
The tests were done with only one computer, one file-server and the Thecus N4100+ in question here. There was no other network traffic at the time of the test. I cannot even imagine what would have happened if the N4100+ unit had to deal with a multiple access scenario.
During the write operation, the CPU utilisation of the Thecus was reported to be at 90~100%, whereas with the read operation it settled at about 30%.
I've read about some similar issues with the N4100+ from a bunch of other users of the same unit and am concearned with this being a serious issue needing to be addressed urgently.
I am very disappointed with the performance of the unit and am looking for an explanation. Can anyone help out?