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[Dynamite Monkey]

Sorry for the long delay but I have finally been able to test the NAS.

I can confirm that the drives are DEFINITELY powering down even though I have HDD hibernation disabled.  I've enabled the feature and disabled it again just to make sure the flag wasn't erroneously reporting.

When attempting to access the NAS, the drives spool up sequentially.  It takes around 8 - 10 seconds per disk. 

What would be the next steps for reporting this issue and hopefully having D-Link fix it in the somewhat near future?

[JavaLawyer]

Try enabling hibernate and increase the delay to the maximum time. Assuming the hibernation settings are working, that should minimize the performance disruption.

[JavaLawyer]

I've been thinking about your issue a bit more. Do you have Green HDDs? My thought here was that Green drives have an internal controller to manage power cycling which may impact performance. Even if this is the case, I'm not  sure if the NAS hibernate settings supersede the HDD on-board controllers or Vice versa. Just a thought.

[Dynamite Monkey]

I've been thinking about your issue a bit more. Do you have Green HDDs? My thought here was that Green drives have an internal controller to manage power cycling which may impact performance. Even if this is the case, I'm not  sure if the NAS hibernate settings supersede the HDD on-board controllers or Vice versa. Just a thought.

Great thought but they're not green drives - I hate those things.

Both of my drives are Seagate 7200RPM ST31500341AS units.  http://www.seagate.com/ww/v/index.jsp?vgnextoid=511a8cf6a794b110VgnVCM100000f5ee0a0aRCRD

And from your previous post, I did enable hibernate support and set the maximum time of 5 hours.  The unit is still powering down.  I'll make do until this "feature" is fixed. 

[JavaLawyer]

Great thought but they're not green drives - I hate those things.

Both of my drives are Seagate 7200RPM ST31500341AS units.  http://www.seagate.com/ww/v/index.jsp?vgnextoid=511a8cf6a794b110VgnVCM100000f5ee0a0aRCRD

And from your previous post, I did enable hibernate support and set the maximum time of 5 hours.  The unit is still powering down.  I'll make do until this "feature" is fixed.  

Hey, I gave it a shot. The only thing I can think of (and this is a stretch) is that the DNS-325 firmware was somehow corrupt.

(1) Save the DNS-325 Configuration Settings file to your local desktop. This functionality should be under "Management" in the web interface. The configuration settings file will permit you to quickly restore your custom settings.
(2) Flash the firmware to the factory default by holding down the button on the rear of the unit for > 10 seconds. Flashing the firmware should have no affect on your HDD configuration or data
(3) Upload the Configuration Settings file
(4) Test the DNS-325

[Dynamite Monkey]

Well, I've updated to the latest firmware (1.02b3) and the issue is resolved.

I'm not sure whether there is a specific fix in this release or if my firmware was corrupted but everything is working fine now. 

Interestingly enough, even when I had the power management setting enabled and set to 5 hours, the drives would spin down after just a few minutes of inactivity so not only was the setting permanently stuck on, it was permanently set to a very low time. 

Anyway, all's well that ends well.

Thanks for all the suggestions and assistance everyone. 

[JavaLawyer]

No problem, I'm glad everything worked out for you.

[priitv8]

Well, I've updated to the latest firmware (1.02b3) and the issue is resolved.

No problem, I'm glad everything worked out for you.

Before I start simply making blind tests, I thought I might get a quick answer from this forum.
I have a DNS-325 and WD Caviar Green 3TB drive, Firmware level is 1.02b3. The NAS never seems to hibernate the HDD.
Can this be due to:
1) uPNP and iTunes Server enabled?
2) PM2 mode on HDD not enabled (it is the factory default)?
PS Should the PM2 mode be enabled on HDD when used in a NAS in general?
>>How to enable and disable PM2 (power management) on WD SATA drives<<

UPDATE: The reason for HDD not hibernating is clear now. As ever so often, it was my own stupidity. I had configured HDD to go to sleep after 15 minutes of idle time. However, I also had configured the iTunes Server to re-scan the HDD for media updates every 5 minutes! So the 15 minutes of HDD idle time never came to be!
However, usefulness of PM2 Mode in a NAS application and DNS-325's support for it remains.

[xpmps]

there is a utility to change the time parked the heads of your caviar green on the official website of wd. see that the general framerate greatly improves nas