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Defective Samsung 256GB SSD?

O

omegasyn

macrumors regular
Original poster
Feb 16, 2007
102
0
New York
Intel 80GB SSD xbench = 140-150 range

Samsung 256GB SSD xbench = 100-110 range

Aren't the samsungs suppose to outperform the intel ssd's or is there something wrong with my drive?
 
emt1 said:
Model numbers would be nice.
Click to expand...

Alright, I don't know how MANY samsung 256GB SSD and 80GB SSD there are but here you go:

SSDSA2MH080G1 - Intel SSD
Max Read = 250mb/s
Max Write = 70mb/s

MMDOE56G5MXP-0VB - Samsung SSD
Max Read = 220mb/s
Max Write = 200mb/s
 
Here are the latest xbench trials. I've included the two to show you the horrible results.... Should've just upgraded to a intel ssd 160gb instead....

Samsung 256GB SSD Trials

Test Samsung 1:
picture1hub.png


Test Samsung 2:
picture2h.png


Intel 80GB SSD Trials

Test Intel 1:
picture4ive.png


Test Intel 2:
picture5phb.png
 
Isn't the Samsung an MLC drive, whereas the Intel is an SLC drive? That could explain the diffeence in performance (I am guessing....)
 
omegasyn said:
No, they're both MLC drives. Only the intel extreme ssd's have SLC's
Click to expand...

Did you do a full zero write on the Samsung when you installed it? you should be getting twice the write speed for sure, but it looks like the drive is in the performance degradation state due to the drive has been written all across, making it perform very badly since it has to rewrite each block. You should do a full erase on it to reset it to default all zero bits which will gain all the speed back since it has nothing to rewrite to.
 
MikhailT said:
Did you do a full zero write on the Samsung when you installed it? you should be getting twice the write speed for sure, but it looks like the drive is in the performance degradation state due to the drive has been written all across, making it perform very badly since it has to rewrite each block. You should do a full erase on it to reset it to default all zero bits which will gain all the speed back since it has nothing to rewrite to.
Click to expand...

No I did not but will try it overnight tonight..... Will report back tomorrow to post the results.
 
Just completed a zero-day format with clean install and results are identical. If anyone have any suggestions, keep me update.
 
I'm pretty sure the Intel X25 SSDs are head and shoulders above anything else out there right now. I know Samsung's SSDs are very good, they're not as good as the Intel ones (but much better than the vast majority of other SSDs out there using the JMicron controller).
 
NATO said:
I'm pretty sure the Intel X25 SSDs are head and shoulders above anything else out there right now. I know Samsung's SSDs are very good, they're not as good as the Intel ones (but much better than the vast majority of other SSDs out there using the JMicron controller).
Click to expand...


Samsung should be so much better than Intel in write speed. there's no question about that, no doubts. It should atleast outspeed Intel in every write speeds test. Intel is an older generation behind Samsung's new MLC controller. The IOPS may still be Intel's advantage but write is its weakness.

Even OCZ Vertex with the new firmware is now very close to 250MBps/160MBps and good IOPS results.

The SSD market is about to take another step forward very soon with new controllers from everywhere and Intel may lose it's place at the top.
 
i ran xbench on the vertex 250gb SSD drive and here are the results. i was very impress. this drive beats the samsung handsdown!!! the proof is right here!!!

Results 216.99
System Info
Xbench Version 1.3
System Version 10.5.6 (9G2141)
Physical RAM 4096 MB
Model MacBookPro5,2
Drive Type OCZ VERTEX 00.PT1
Disk Test 216.99
Sequential 166.54
Uncached Write 225.70 138.58 MB/sec [4K blocks]
Uncached Write 151.01 85.44 MB/sec [256K blocks]
Uncached Read 95.73 28.02 MB/sec [4K blocks]
Uncached Read 396.82 199.44 MB/sec [256K blocks]
Random 311.27
Uncached Write 117.20 12.41 MB/sec [4K blocks]
Uncached Write 391.13 125.22 MB/sec [256K blocks]
Uncached Read 1781.24 12.62 MB/sec [4K blocks]
Uncached Read 833.19 154.60 MB/sec [256K blocks]
 
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