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continuum

Improved JMicron 602B controller... (repost?)

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http://www.legionhardware.com/document.php?id=804&p=0

Performance looks pretty good-- small block writes are still anemic but they're improving...

With two JMicron 602B's inside drive, performance is almost up to the Intel X25-M in some areas, beats it in some of the more synthetic benchmarks, although I think overall real-world the X25-M may still be faster.

Main advantage seems to be price-- the one vendor I can find who has it listed on froogle is only $345. Holy crap that's cheap.

The JMicron 602B controller has been the main culprit, the very controller that is used by the Titan SSD’s. This controller only features a tiny 16KB cache where as the Intel MLC controller scores a much bigger 256KB cache. This shuddering problem is most evident when reading and writing data at the same time.

Extracting a large amount of compressed files while trying to surf the net would be a real-world example of this scenario. However the G.Skill Titan features two JMicron 602B controllers which work in a RAID0 like configuration, and this seems to have solved the shuddering problem, at least as far as we can tell.

Stuttering is still a concern, though... doh.

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The JMicron 602B controller has been the main culprit, the very controller that is used by the Titan SSD�€™s. This controller only features a tiny 16KB cache where as the Intel MLC controller scores a much bigger 256KB cache. This shuddering problem is most evident when reading and writing data at the same time.

Extracting a large amount of compressed files while trying to surf the net would be a real-world example of this scenario. However the G.Skill Titan features two JMicron 602B controllers which work in a RAID0 like configuration, and this seems to have solved the shuddering problem, at least as far as we can tell.

Two points:

  • One JMicron 602B controller is not able to write without a horrible lag problem
  • Two controllers may just allow for the horrible lag problem to be less frequent

Thanks for letting us know anyway...

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What happenned to SSDs? These Intel prices still same for almost a year.

Quite a feat, considering that you can only buy them for 4 months now. :)

But yeah, they stayed expensive, because they can afford to be expensive. SLC performance == SLC price.

Other SSDs otoh steadily approach the spotmarket price of flash, which has stabilized after the huuuuge drop a year ago.

The combination of the initally large margins dropping, and the flash price collapse caused the enormous price drop SSDS had tha last 18 motnh.

Considering that memory companies are right at the edge of collapse even with the current prices, and no golden bullets are in sight, this is at an end for the moment.

I think it will take some time before the $1/Gbyte barrier for flash will be broken (i.e. not this year)

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