DS1010+ & WD Green WD20EARS

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DS1010+ & WD Green WD20EARS

Postby the_noisy_crow » Sat Jul 31, 2010 8:32 am

Hi all,

Just ordered by DS1010+ and it should be with me in a few days (hopefully middle of next week, ~04 Aug). :D

In the meantime I've bought 2 more WD20EARS series (2TB Greens w 64MB) and am trawling the forums again in preparation for the system.

So I have the following
1x WD20EARS-00J2GB0 (pre-existing)
2x WD20EARS-00MVWB0

They're not strictly listed in either the Official or User HCLs, but there's talk in the forums about them
DS1010+ and a post about WD or Samsung, viewtopic.php?f=26&t=23657&p=100121&hilit=DS1010#p100121
DS1010+ and a post about disk alignment for performance, viewtopic.php?f=26&t=22746&p=103850&hilit=DS1010#p103850

Do I need to run the WD align tool BEFORE inserting these disks into the NAS and installing?

How do I know if they are working OK? I've seen talk about keeping an eye on the Load Cycle Count via SMART info?
What else needs to be monitored to ensure compability?

I've downloaded the lastest firmware, is this what I should install with initially?

Later, I want to expand the volume dynamically by bringing in 2 more disks (1.5TBs)
1x WD15EADS-00H7B0
1x WD15EADS-00P8B0
I assume the RAID 5 container will expand dynamically to accomodate the new disks?

I appreciate all feedback on these questions.
Thank You
NC
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Re: DS1010+ & WD Green WD20EARS

Postby the_noisy_crow » Sun Aug 01, 2010 1:27 am

Hi all,

I've read the WD Advanced Format FAQ for non-Windows OS
http://wdc.custhelp.com/cgi-bin/wdc.cfg ... faqid=5655

I assume then from this, that when the partitions are created by the installation of the firmware, that the correct alignment is set then?

Or is it necessary to Telnet/SSH onto the NAS and run these tools manually?

Thanks
NC
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Re: DS1010+ & WD Green WD20EARS

Postby the_noisy_crow » Mon Aug 02, 2010 9:18 am

After trawling more and more of the forums, I decided I was potentially opening myself up to a world of pain.

So I've returned the 2x WD20EARS-00MVWB0
They were brand new and unopened.

I won't be using the 1x WD15EADS-00P8B0 in my DS1010 either, given the grief I've read about that too.

I think I'll be sticking to the Enterprise series of disks.

I'd still like some feedback on the need to check on sector/alignment.

Thanks
NC
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Re: DS1010+ & WD Green WD20EARS

Postby blex » Mon Aug 30, 2010 1:55 pm

Hi, you mentioned in your post you read about "grief" with the green drives. I'm trying to decide on the same setup right now and was wondering if you could point me at what you read on the subject.
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Re: DS1010+ & WD Green WD20EARS

Postby the_noisy_crow » Tue Aug 31, 2010 12:58 am

Sure...

If you search this area of the forum and in particular the Western Digital Load Cycle Count Discussion area you'll see problems associated with various models.

In general when I expanded the search and looked at the NetGear or QNAP forums, there are also complaints about performance and more importantly reliability from Green drives.
Having tried a "cheap" Seagate and then returning it because of vibration and a general lack of trust, I eventually arrived at the conclusion that if you want hassle-free RAID with no issues around performance and relability, not only on the physical drive but also things like the "Time Limited Error Recovery" which stops drives de-syncing from the array when there's an error, you need to consider spending more :(

That said, I'm up to a month of use with my current config and haven't had any problems, yet (touch wood).
BUT the thing is, a month isn't very long. There are people who have been running the WD Greens much longer and haven't had problems, and then there are people who have.

I tried a Samsung HW203WI for a friend the other day, ran it for 4 days. Again a drop in the bucket time wise but enough to notice that the Load Cycle Count WAS NOT climbing much.
Again, how you use the drives may mean otherwise. Whereas I have machines on all the time and they are using the NAS, so going to sleep doesn't happen that often.
I don't power cycle much either.

Right now I'm running 2x WD Blacks (2TB), 2x WD Green (1.5) 15EADS series and 1x WD Green (2.0) 20EARS.
Mainly because I had the green disks prior to the NAS and bought the blacks as a middle ground to buying Enterprise disks (RE4, NOT GP (Green Power) Enterprise).
The Blacks run much hotter 40-42c vs 35-38 on the Greens. Performance is better though as they are a solid 7200 NOT a random 5400-7200.

I've also used WDIDLE3 to DISABLE/MAX OUT the firmwares Load/Unload timer and I wrote zeroes to the disks before using them, ensuring completely blank disks so that the partition layout is correct for cylinder boundaries and performance.

In summary, I figure the following:
- by distributing the type of disks I have I'm lessening failure by model happening at the same time
- My disks are various ages (apart from the Blacks) so I'll hopefully avoid death by batch
- As a disk "plays" up, I'll replace it with something better, ie, assuming problems with the Greens.
- I also backup the important stuff on the array, meaning in a complete failure, I'm not weeping like a small child

Hope that helps. :D
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