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I bought a NAS from Conceptronic CH3MNAS and built in two Western Digital 1,5TB Green Drives.

I only get a write speed of 6mb/s in LAN

The configuration of the drives is as follows: - Raid 0 - EXT2

Is that a normal speed?

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migrated from serverfault.com Mar 14 '10 at 17:26

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It sounds slow. Keep in mind that WD does not recommend you use Green Drives in a RAID. This is particularly dangerous in a RAID0 where a single failure will result in a total loss. –  Zoredache Mar 13 '10 at 22:54
    
6mb/s is very different from 6Mb/s or 6MB/s. Please change your question to reflect the appropriate value so we know exactly what transfer speed you are getting. –  MDMarra Mar 14 '10 at 18:23
    
It is goddamn slow anyway. :/ –  Shiki May 18 '10 at 15:06
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2 Answers

Assuming you are on a 100Mb/s network and that you actually mean that you are getting 6MB/s this might be right.

6MB/s = 48Mb/s. Actual TCP/IP throughput on a 100Mb/s network is around 80Mb/s.

The 32 or so Mb/s that you are missing in performance can be for a number of reasons. Old NIC drivers, bad/old network cables, cheap networking equipment, etc.

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I'm getting 10-14MB/s at best with 100mbps conection. You should (the questioner) check your lan cables and such. –  Shiki May 18 '10 at 15:07
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In support of Zoredache, those Green drives are very, very slow and are NOT effective in a RAID environment. I am actually using 2 1TB green drives in a NAS RAID1 and the performance is horrible. I didn't do my research before setting this up and luckily for me the usage of this device as secondary backup means the performance hit doesn't bother me (and the RAID1 means I'm not too concerned with a failure). I would recommend you switch to the WD Blue series for reliable NAS usage. Do not use the WD Black for RAID as they will drop out of configuration when they power down.

If you have the money, the RE line of Western Digital drives is your best bet as they are designed for RAID configurations. They are definitely more expensive.

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