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Vertex 4 performance?..... Performance hit after 50% full? - Page 3

post #21 of 26
Quote:
Originally Posted by xmod View Post

So then why pay a huge premium for an SSD over a HDD if you're going to settle for speeds of 80-100MB/s. Seems like a huge waste of money.

For the minimum 10x increase in random 4K performance and the much, much lower access times/latencies. If you're just getting an SSD for running an OS, that's what counts.

As an aside, there are probably a few people on this board who have paid $500 for SATA II SSDs with sequential performance of just 80-100MB/s (1st gen X25-M, etc) and have still found it to be the best upgrade to their system despite the steep price. Of course, deliberately getting a drive with slow sequential performance doesn't make much sense nowadays given we're spoiled for choice (e.g. just today, the Samsung 830 128GB @ $70 from Amazon).
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post #22 of 26
Would I buy another OCZ product? No.

Do I believe a word Tony says after the sandforce 2281 fiasco? No.

But facts are facts. We have users here with Vertex 4 over 50% full and they are not having performance issues.

So I'd say the issue has been taken out of context by those who don't understand how it works.
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post #23 of 26
Thread Starter 
Quote:
Originally Posted by rui-no-onna View Post

For the minimum 10x increase in random 4K performance and the much, much lower access times/latencies. If you're just getting an SSD for running an OS, that's what counts.
As an aside, there are probably a few people on this board who have paid $500 for SATA II SSDs with sequential performance of just 80-100MB/s (1st gen X25-M, etc) and have still found it to be the best upgrade to their system despite the steep price. Of course, deliberately getting a drive with slow sequential performance doesn't make much sense nowadays given we're spoiled for choice (e.g. just today, the Samsung 830 128GB @ $70 from Amazon).

Yeah but purchased over 1 year ago.

"Spoiled"? No technology advances, better tech can be had for cheaper prices so standards should be re-calibrated as well. People in the PC gaming hobby should know this.


OCZ won't say it obviously but I think as a cost cutting measure, OCZ put 50% fast cells and 50% slow cells into the Vertex 4. That's why performance drops after the disk is half full, because the fast cells have been used up.

You have to wait 30+ minutes for the performance to get back up to speed because the Vertex 4 has to move some of the data from the fast cells to the slow cells freeing up the fast cells for usage.
Edited by xmod - 10/31/12 at 2:49pm
    
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post #24 of 26
SF2281 fiasco is not all OCZ's fault..if there really is a fiasco. We are supplied a FW from the mothership like everyone else.

Vtx4...the 256's and especially the 512's are not effected by the 50% up and down performance...its the 128's. What we did was make a slowish drive much much faster BUT you have to understand how it works. When you build drives certain configs are slower or faster depending oh controller channel filling etc etc...There is a misconception that all drives/capacities should give the same performance...they will not. What OCZ did this time was bring performance very close across the product range so that "within a few rules" the 128's were as fast as the 512's.

Now we have stated this on the OCZ forum, I can give you all a firmware that will write at the same speed regardless of how much you write...so it works just like everyone else's SSD.

Side effect is write speed comes down quite a bit, you lose that burst speed everyone likes...if you want the drives that way I can see if we will re release FW1.2 for you, being honest no one will like it. And remember this is for the 128's only.

Education time... go read this http://www.tomshardware.com/reviews/vertex-4-firmware-benchmark,3245.html

Now I can not say if this is what we are doing but it makes for a good read...it will help you understand what is possible with MLC nand.
post #25 of 26
Quote:
Originally Posted by xmod View Post

Yeah but purchased over 1 year ago.
"Spoiled"? No technology advances, better tech can be had for cheaper prices so standards should be re-calibrated as well. People in the PC gaming hobby should know this.
OCZ won't say it obviously but I think as a cost cutting measure, OCZ put 50% fast cells and 50% slow cells into the Vertex 4. That's why performance drops after the disk is half full, because the fast cells have been used up.
You have to wait 30+ minutes for the performance to get back up to speed because the Vertex 4 has to move some of the data from the fast cells to the slow cells freeing up the fast cells for usage.

Ohh man you have it sooo wrong...we don't mix the nand, it has to do with how the nand works..im sorry xmod but you really do have it all wrong mate.

also this 30mins thing...its way way faster than that, I can NOT tell you how fast so you will just have to trust me its faster...less than 10min in most cases..way less.

Read that article i linked at Toms, this will i hope help you understand what can be done with fast nand and slow nand all on the same nand IC wink.gif
post #26 of 26
Quote:
Originally Posted by xmod View Post

Quote:
Originally Posted by rui-no-onna View Post

Of course, deliberately getting a drive with slow sequential performance doesn't make much sense nowadays given we're spoiled for choice (e.g. just today, the Samsung 830 128GB @ $70 from Amazon).

"Spoiled"? No technology advances, better tech can be had for cheaper prices so standards should be re-calibrated as well. People in the PC gaming hobby should know this.

Read that sentence again. I said we were spoiled for choice meaning we have plenty of options to choose from (e.g. Samsung 830, Samsung 840 Pro, Plextor M5 Pro, etc) - not that we shouldn't expect improvements in technology. rolleyes.gif
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