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Raptor 10k 150gb?! - Page 2

post #11 of 16
You will have much better access time making your system more snappy. my 10k drives average about 6.7ms access vs 13ms for 7200rpm vs SSD .02ms

It would be good for the short term but dont expect ssd speeds
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post #12 of 16
Honestly wouldn't bother with it, my friend has 2 in raid 0 and I'm hugely disappointed by its performance.

Save the money towards a SSD
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post #13 of 16
Thread Starter 
Quote:
Originally Posted by Kramy View Post

That's an ancient and slow 10k RPM drive. Any modern 7200RPM drive will outperform it. I might pay $20 for it, but I think I'd rather have something faster...
Just save up for your SSD.
And I wouldn't RAID your SSDs. That usually makes them feel slower. tongue.gif (and knocks out TRIM)

raid 0 ssds makes them "feel slower"?!!?!?!?!?!?!?!

really?! last time i checked raid 0 = better performance?!?!?
post #14 of 16
Thread Starter 
oh ok you twisted my arm!!

SSD M4 by february, 128gb possibly in raid 0.... watch this space (well not this space but youll see it in my sig rig and smile on my face!!! biggrin.gif
post #15 of 16
Quote:
Originally Posted by Kramy View Post

That's an ancient and slow 10k RPM drive. Any modern 7200RPM drive will outperform it. I might pay $20 for it, but I think I'd rather have something faster...

Just save up for your SSD.

And I wouldn't RAID your SSDs. That usually makes them feel slower. tongue.gif (and knocks out TRIM)

TRIM is supported on Intel controlled SATA connections. Also Garbage collection on M4s are good enough you can do without TRIM.

Edit: I did not notice twice the speed of a single SSD but it certainly was not slower.
Edited by ChaosBlades - 1/8/12 at 8:53pm
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post #16 of 16
Quote:
Originally Posted by YLDaryl View Post

You will have much better access time making your system more snappy. my 10k drives average about 6.7ms access vs 13ms for 7200rpm vs SSD .02ms

It would be good for the short term but dont expect ssd speeds
It's an ancient and slow 10k RPM drive, which averages 10ms access times and maybe 60MB/sec sequential...

Any modern 7200RPM drive will outperform it.
Quote:
Originally Posted by Big-Pete View Post

raid 0 ssds makes them "feel slower"?!!?!?!?!?!?!?!

really?! last time i checked raid 0 = better performance?!?!?
With HDDs it does - but if one drive takes 13ms and the other takes 15.4ms... it just waits for them to both finish the read or write and sync up again. You double your sequential performance, so seeks taking a few miliseconds extra is a fine tradeoff. And besides that, 13ms vs 15.4ms is only an ~18% difference in access times - that's hardly anything when you're getting +100% read/write speed.

However with SSDs, a single SSD is more than fast enough. Most of a program's loadtime is going to be CPU limited rather than I/O limited - unless of course the SSDs get locked up and stutters. Allow me to explain...

The M4/C300 are awesome SSDs with awesome controllers, so RAID would probably be fine with them - but if you look up benchmarks and reviews for older SSDs (Indilinx Barefoot SSDs, first-gen Sandforce - even some older Intel SSDs) you'll see reviews that mention max access times of around 500-1000ms. That's because every ~100,000 reads or writes (arbitrary number) they get stuck on something - usually they need to do some quick garbage collection to find a spot to write something. 100k reads or writes could be several times per minute with an SSD - TRIM helps combat it, but RAID-0 eliminates TRIM and multiplies the issue by 2... tongue.gif Because of that RAID-0 arrays with older SSDs generally felt more stuttery than single drives. At best people said there was no noticeable difference.
Quote:
Originally Posted by Big-Pete View Post

oh ok you twisted my arm!!
I'm afraid not. While it may not be an issue with the M4 (I think it has max access times under 10ms - a huge improvement from earlier generations), it is still an issue. Nobody really knows what longterm effect TRIMless operation has these drives. Since one SSD feels the same speed as two... I generally opt for the safety of one.
     
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