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Slow Vertex 2?

post #1 of 18
Thread Starter 
I think I'm getting some slow speeds from my new Vertex 2 120GB. I have enabled write caching and it is running in AHCI mode and TRIM is enabled of course. Any advice?

CrystalDiskMark sequential - 200 MB/s read and 79.81 MB/s write
HD Tune Pro Benchmark Tab - Min 120.7, Max 210.9, Avg 156.9 Read
Winsat Seq Read - 217.8 Seq Write - 240.67
AS SSD Seq 199.3 read, 71.8 write
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post #2 of 18
I get those same speeds in IDE mode so my guess is you're not actually in AHCI mode.
post #3 of 18
Beware that running benches on the vertex 2 will slow it down. Don't run any for a few days, then try again to see if the speed has come up. I don't know if this is the problem, just a suggestion.

http://www.ocztechnologyforum.com/fo...d-General-Info

Quote:
Here is the thing, if you hammer the driver with say enough writes that the drive would under normal use/see in 7 days within a few hrs, the drive will slow down for 7 days, maybe longer. It does this to protect the nand life. So your guys seeing a 50% drop may actually see 30% which is the normal drop, then a further 20% because at some stage they have hammered the drive and then not realised its going to take 5 days or longer for the speed to creep back up. Also remember this write quantity slowdown is further impacted by how you use the drive after you have hammered it.

So take this as an example:

1 you run a few benches and fill the drive with incompressible data,...you do this a few times

2 you run As-SSD a few times and on each run the performance drops lower and lower.

3 you panic thinking the drive is broke

4 you then note its just slowed down quite a bit so continue benching to see if it has started to speed up

5 this benching is actually delaying the drive recovering
6 you note the drive has stayed dog slow....so continue with 4 to 6 AS-SSd runs per day hoping or looking for a drive speed increase

7 the drive stays dog slow

8 you post on the forum that the drive is somehow broken
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post #4 of 18
My writes seem kind of meh, but you can have a comparison (I have 80gb model though). Not sure if the write speeds are up to snuff, but I have done everything I can think of so I live with it.

Here is a test I did after a secure erase/image restore.


A few others (these were pre erase).

ATTO


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post #5 of 18
Thread Starter 
Quote:
Originally Posted by Astral Fly View Post
Beware that running benches on the vertex 2 will slow it down. Don't run any for a few days, then try again to see if the speed has come up. I don't know if this is the problem, just a suggestion.

http://www.ocztechnologyforum.com/fo...d-General-Info
I've only run benchmarks a few times and usually go weeks in between. But I have never seen my drive perform at the advertised sequential write speeds for a SandForce 1222 drive which is somewhere around 280 - 270 read/write.
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post #6 of 18
Quote:
Originally Posted by phrossbyte View Post
I've only run benchmarks a few times and usually go weeks in between. But I have never seen my drive perform at the advertised sequential write speeds for a SandForce 1222 drive which is somewhere around 280 - 270 read/write.
ATTO is likely the only benchmark to show close to advertised speeds/
    
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post #7 of 18
Quote:
Originally Posted by phrossbyte View Post
I've only run benchmarks a few times and usually go weeks in between. But I have never seen my drive perform at the advertised sequential write speeds for a SandForce 1222 drive which is somewhere around 280 - 270 read/write.
ATTO is likely the only benchmark to show close to advertised speeds. Maybe CrystalDiskMark using 0fill. At least for sequential tests.

ATTO

CDM

Edited by Polska - 1/5/11 at 11:17am
    
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post #8 of 18
Thread Starter 
Quote:
Originally Posted by Polska View Post
ATTO is likely the only benchmark to show close to advertised speeds. Maybe CrystalDiskMark using 0fill. At least for sequential tests.
ATTO is only slightly slower, CrystalDiskMark is significantly slower in sequential read/writes.

Thoughts on the results?

Here are my results in ATTO and Crystal Mark

ATTO


CrystalMark

Edited by phrossbyte - 1/6/11 at 6:48am
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Lucy
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post #9 of 18
Quote:
Originally Posted by phrossbyte View Post
ATTO is only slightly slower, CrystalDiskMark is significantly slower in sequential read/writes.

Thoughts on the results?

Here are my results in ATTO and Crystal Mark

ATTO
[IMG]http://i1117.photobucket.com/albums/k600/phrossbyte/ATTO.jpg[IMG]

CrystalMark
Your 4K random reads are about half of what they should be. Are you running with write back cache enabled?
post #10 of 18
Thread Starter 
Quote:
Originally Posted by Boyboyd View Post
Your 4K random reads are about half of what they should be. Are you running with write back cache enabled?
I don't know. How do I check that? Is that the same as "write caching"? If so no I do not. I have before and it did not affect my results.
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Lucy
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