I believe all this info is here http://blog.backblaze.com/

This is rather comprehensive and what I gathered is that they are mostly the same with Hitachi being the most reliable. 

On Tuesday, 4 February 2014, Okechukwu <okechukwu@gmail.com> wrote:
@Wash - research has shown that WD disks have very low failure rates - I can't remember the link - but Seagate have way higher failure rates than WD. I can't remember which disk had the lowest of them all - they actually test 3 types over a very long period of time. Sorry, I won't google that for you :-)

./Ok3ch


On Tue, Feb 4, 2014 at 4:13 PM, Odhiambo Washington <odhiambo@gmail.com> wrote:
I avoid WD drives because their failure rate is too high - personal experience. So the post by Kevin Chege kinds left me asking myself where it is I am wrong - not just went wrong - with WD!


On 4 February 2014 18:06, William Muriithi <william.muriithi@gmail.com> wrote:


> Synology will always advise that you use Enterprise HDD.
>
> One thing I've always wondered is what makes these enterprise drives
> better, yet they just have the damn rotating disks like the others...

Enterprise hard disk are just consumer hard disk with ECC (raid 2 in the drive firmware disabled ). The reason being if error correction is enabled, the drive take longer to acknowledge to the system's RAID that all is well. The RAID card do reject drives that are taking long to respond. In another word, the enterprise HDD are damned down hard disk. And the stupid vendors do actually price it up while its actually inferior to consumer drives

In short, unless you are going to use them behind a RAID card, ignore Synology advice.  They just want to make cash off you.

Oh and one other thing. Avoid Seagate drives. They have buggy firmware that kill their drives. Google if you doubt it

Muriithi

>
>
> On 4 February 2014 15:54, Kevin G. Chege <kevin.chege@gmail.com> wrote:
>
> > be careful of the drives you select too. I found out the hard way, luckily
> > nothing vital was lost:
> >
> > http://techreport.com/news/25940/hard-drive-reliability-study-names-names
>


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