does the 840 PRO/EVO have built in OP?

[Berryracer]

If Samsung Magician recommends 10% OP, does that mean that the 840 PRO/EVO have factory hidden OP? If not, then why Samsung recommends only 10% OP but Anandtech recommends 25 %??

 

[CakeMonster]

AT recommends 25% OP? Where? I mean, advising people to not filling up the drive completely is one thing, but a blanket statement that everyone should use 25% OP is insane. I think the obsession with OP on these forums have gone a bit too far.

The spare area on the EVOs are 9%. I have one and I have not set aside anything with OP.

 

[G73S]

you think obsession here is too much? head over to notebookreview forums where the master of SSDs Mr. tilleroftheearth goes into every thread and swears by 30% OP and even links to some evidence where drives perform better with 30% OP which I think is insane!

I think SSDs should be sold with the advertised capacity after OPing if that's really vital to have it perform well on the long run

Now back to the topic, I know Anandtech are master reviewers of these all SSDs. Can someone from their staff please tell me if the Samsung SSDs have built in OP and by how much?. and why does Magician only recommend an OP of 10%??????

 

[F1shF4t]

All SSDs already have spare area, ranges from 7% and up. There is no need to set any extra OP unless your workload requires it, and we're not talking normal workstation/gaming/internet use here.

Also with every OS that supports Trim your effective OP is the amount of free space you have.

 

[Cerb]

If Samsung Magician recommends 10% OP, does that mean that the 840 PRO/EVO have factory hidden OP? If not, then why Samsung recommends only 10% OP but Anandtech recommends 25 %??

1. All flash storage devices that you can just plug in and use have built-in OP. It's a fundamental part of making mass-market flash storage viable.

2. Where does AT recommend 25% OP? That's just one of the regular test points, to see what, if any, effects can be seen from adding more. Adding OP is primarily useful for non-client workloads, and/or TRIM-free environments.

An 840 Evo 250GB has 256GiB flash on board, with 3GiB as pseudo-SLC (should take 9GiB of TLC). So, if my understanding of how that's allotted is right:
(((256-(3*2))*2^30)-(250*(10^9)))/2^30 = 17.17GiB factory OP.

 

[tweakboy]

Evo pownz!!!

 

[Berryracer]

17.17GiB factory OP.

So in that case, setting a 30% OP on my 1TB SSD PLUS that already built in OP is overkill heh? I will be just fine with the Samsung recommended 10% OP?

Mind you, all I do is surf the net and watch movies. nothing else

 

[kevinsbane]

Having that much overprovisioning is useless unless you regularly fill up 100% of your allocated drive space.

Free space on your SSD is as good as having unallocated space on your SSD. 300GB unused is pretty much the same thing as 300GB overprovisioned. So just don't fill it up 100% regularly.

 

[Berryracer]

Having that much overprovisioning is useless unless you regularly fill up 100% of your allocated drive space.

Free space on your SSD is as good as having unallocated space on your SSD. 300GB unused is pretty much the same thing as 300GB overprovisioned. So just don't fill it up 100% regularly.

a member on the Notebook Review forums who is well experienced claimed that FREE SPACE DOES NOT EQUAL OP space

I don't know what to believe anymore there is so much information floating around on the web

 

[ctk1981]

http://www.anandtech.com/show/6489/playing-with-op

Anand's write up on OP. Basically recommends 10-20% OP, but some drives benefit more greatly from higher OP%...samsung just happens to be one that does better.

 

[CakeMonster]

a member on the Notebook Review forums who is well experienced claimed that FREE SPACE DOES NOT EQUAL OP space

I don't know what to believe anymore there is so much information floating around on the web

1) It does (Well, because I expect someone to nitpick.. It does for practical purposes on newer SSDs)

2) Then don't bother to mess with something that works well in the first place. I think I said it in a similar thread here... People on hardware forums tend to have a compulsion to tinker. Just don't. Doing something because it feels good to do something is usually a waste of time when you have no idea whether it will work.

 

[Cerb]

So in that case, setting a 30% OP on my 1TB SSD PLUS that already built in OP is overkill heh? I will be just fine with the Samsung recommended 10% OP?

Mind you, all I do is surf the net and watch movies. nothing else

In the case of a 1TB:
(((1024-(12*2))*2^30)-(1000*(10^9)))/2^30 = 68.68GiB.

You'll be fine using all the space available, not going and doing any added OP of your own.

 

[Cerb]

a member on the Notebook Review forums who is well experienced claimed that FREE SPACE DOES NOT EQUAL OP space

I don't know what to believe anymore there is so much information floating around on the web

Factory OP is guaranteed to be there, and hidden from you, the user. Having contiguous address space in a known empty state, and then never using it (like partitioning with space free at the end) generally adds to the factory OP, except where bad blocks are concerned. TRIM behavior, however, varies by drive. On some, it gives performance almost as good as that much over-provisioning added, while on others it does not. Even when it doesn't work as well, it's still giving the drive more info about the space, and still results in operating faster than without it, and you have that extra space to use, should you need it.

 

[Berryracer]

Factory OP is guaranteed to be there, and hidden from you, the user. Having contiguous address space in a known empty state, and then never using it (like partitioning with space free at the end) generally adds to the factory OP, except where bad blocks are concerned. TRIM behavior, however, varies by drive. On some, it gives performance almost as good as that much over-provisioning added, while on others it does not. Even when it doesn't work as well, it's still giving the drive more info about the space, and still results in operating faster than without it, and you have that extra space to use, should you need it.

Right, thank you for clearing that up.

What I was doing is OPing my 1TB drive by 30% in Samsung Magician, so if we add the built in OP that was like 37% which seems overkill and a waste of space whether or not I use it.

So now that's why Samsung only recommends 10% OP since they have built in OP...glad I created this thread and thanks for everyone's time to correct me