Originally Posted by Dark_Slayer
Originally Posted by macks
Well, the fact that higher density has definite performance advantages is being disputed for some reason
- Definite performance advantages? yes
- Inconclusively definite advantage? no
- Relevant (>5%) performance advantage? not definitively in relevant-to-media-server testing
Basically I'm just saying that 3vs5 platter designs are not the holy-grail of HDD designs
Keep in mind technological progress.
In general terms of performance:
Higher density platters > lower density platters
Higher rpm > lower RPM.
But it's not universally true if the MFG intentionally limits performance as to not compete with another product line, or possibly tone it down for reliability. But if they are the same I'd still rather the larger fewer platters but I would not pay extra $ for it.
As the density increases the spindle speed usually decreases. This is because there needs to be enough time to read the data. That is why you don't see high capacity 10k or 15k rpm drives.
A 5 TB five platter 7200 RPM drive is going to be a beast... But I am not sure the MFG are quite there yet in terms of balancing performance with reliability.
I like mature products when dealing with data storage. It just makes me feel better. For this reason the proven 3tb triple platter Seagate gets my nod of approval with all other things being equal or assuming its priced well.
I have nothing against 4tb but my parity is only 3tb so I'm just not there yet personally.
Usually the development of HDD goes like this:
Expand current technology platters to increase capacity (like early 3TB drives that used 5 platters if 600GB to get to 3TB )
Then when technology improves you make the move to fewer platters ( like Seagate 3TB new models with 3 1TB platters).
Same story with 4TB that used 5 platters of 800GB to hit 4TB. Then now 4 platters of 1TB.
While generally true the fewer larger platters are preferred for energy profile and performance - the real change is based on economics and economies of scale. The MFG change models based on the newest or current technology or because what platters are being MFG.
A 5 platter of 1TB each 5TB drive is next. Probably 5400rpm first because its easier to control then you'll see the speed jump up with 7200rpm. But sometimes the MFG goes right to 7200rpm.
In my personal experience 7200rpm drives are more reliable. I've owned over 20 of both. I'm not sure why my faster drives last longer though but it's clearly a trend at least for me.
I'd expect the most reliable drives to be faster variants in the general market place too. ( raptor, velociraptor, enterprise etc...)