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#1 2010-01-31 02:01:56

nixter
Member
Registered: 2009-10-01
Posts: 5

323 + Airport Extreme = slow speeds

So I have a 323 raid 1 setup with two 1tb drives. I have this connected via ethernet to my airport extreme. Here are my wired NASpt results from my new Dell studio xps 13 (Vista)

Running warmup...
Running a 200MB file write on drive z: 5 times...
Iteration 1:     3.75 MB/sec
Iteration 2:     8.41 MB/sec
Iteration 3:     4.4 MB/sec
Iteration 4:     3.48 MB/sec
Iteration 5:     3.34 MB/sec
------------------------------
Average (W):     4.67 MB/sec
------------------------------
Running a 200MB file read on drive z: 5 times...
Iteration 1:     15.39 MB/sec
Iteration 2:     15.43 MB/sec
Iteration 3:     15.01 MB/sec
Iteration 4:     15.04 MB/sec
Iteration 5:     15.56 MB/sec
------------------------------
Average (R):     15.29 MB/sec


Seems a little slow to me! Could it be the lack of gigabit on the Extreme? I'm not even coming close to it's max though.
------------------------------

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#2 2010-01-31 16:44:23

fordem
Member
Registered: 2007-01-26
Posts: 1938

Re: 323 + Airport Extreme = slow speeds

Seems a little slow to you?  What were you expecting?

Are you sure the Extreme doesn't have gigabit - 15.29MB/sec translates to approximately 152 mb/sec, which is way more than 100 mb/sec.

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#3 2010-01-31 20:13:19

oxygen
Member
Registered: 2008-03-01
Posts: 320
Website

Re: 323 + Airport Extreme = slow speeds

the airport extreme has gigabit. (the airport express doent)

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#4 2010-01-31 23:18:38

nixter
Member
Registered: 2009-10-01
Posts: 5

Re: 323 + Airport Extreme = slow speeds

I was comparing my results to other's results with the 323. Some have been getting close to 30 read.

As for the gigabit I was under the impression that earlier extremes weren't gigabit but newer ones were. I'd be happy to be wrong.

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#5 2010-01-31 23:27:00

oxygen
Member
Registered: 2008-03-01
Posts: 320
Website

Re: 323 + Airport Extreme = slow speeds

30 mb/s read is impossible on a dns-323. 15-20 mb/s is usual.

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#6 2010-02-01 02:50:54

fordem
Member
Registered: 2007-01-26
Posts: 1938

Re: 323 + Airport Extreme = slow speeds

30 MB/sec is not impossible - it may not be usual, but it is certainly possible.

What most people don't seem to realise is that a read from the DNS-323 is also a write to another device, and if you have nothing capable of writing at a given speed, then you're not going to be able to read at that speed.

About a year ago I upgraded my IBM xSeries server from Windows Server 2003, to Windows Server 2008, and prior to this upgrade I was able to read from my DNS-323 at speeds just over 30MB/sec, however - during the upgrade I switched from the ServeRAID 7i integrated RAID card in the server to a ServeRAID 7t and also went from RAID1 to RAID5, and the increased write overhead of RAID5 prevents me from achieving those speeds.

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