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Inside Samsung’s SSD

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2:00 AM - 04/30/2009 by Patrick Schmid and Achim Roos

Its 80 g weight makes the 256 GB 2.5” PB22-J 20% lighter than conventional hard drives, and it can operate in a wider temperature range of 0-70°C. In contrast, mechanical drives are typically specified for 5-60°C or even less.

Unlike most other flash SSDs, Samsung’s data sheet specifies that the device supports Native Command Queuing (NCQ) with a queue depth of up to 32 commands. This is not the case for most flash SSDs, with the exception of a few of the latest products based on Samsung or Promise controllers. Samsung also specifically says that the drive supports device and host initiated power management, which means that the flash SSD can be put into a low power idle mode by the operating system, or it can do this on its own.

Like Intel’s X25 family, Samsung built the new device on multi-channel flash memory, which is imperative not only to support fast read performance, but to ensure that it can actually write at a decent speed. In fact, Samsung’s new PB22-J is the fastest writing flash SSD based on MLC flash memory. The device utilizes a controller that was developed by Samsung, and it incorporates a 1 Gbit SDRAM chip as a drive cache memory. This is necessary to support NCQ, and to make sure that the eight memory channels can be utilized at maximum efficiency.

Talkback
Eric The Red 04/30/2009 8:37 AM
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Nice artice, but 1 small note, on page one.. isn't Samsung’s new PB22-J available a little bigger than 256 MB? Seems small..

jpdykes 04/30/2009 9:31 AM
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Can we have the drop down list of pages back?
I really don't want to go through every single page to get to the results and conclusions.

dafin0 04/30/2009 9:41 AM
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jpdykes there is a table of contents at the very top.. but i to like the drop down menu

christianspoer 04/30/2009 9:45 AM
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Price?! I can't seem to find it in the article...

mschu_52 04/30/2009 9:47 AM
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Also note that on the graphs the Intel x25-M is labeled as 64GB, where on pg 8 it says it comes as 80 or 160.. Also did the x25-M have the new firmware?

jpdykes 04/30/2009 9:49 AM
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Good point - I missed that!

pcworm 04/30/2009 9:53 AM
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i like the new table of contents
nice edit

Anonymous 04/30/2009 9:53 AM
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The 256Gb Samsung is available for general sale in the UK; I bought one last week.

mschu_52 04/30/2009 9:57 AM
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I just wish new Table of Contents (TOC), or drop down was on every page, after I get past page 1, you either have to go back to page 1 to jump ahead/around or page though

renozi 04/30/2009 10:04 AM
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no OCZ Vertex?

alert101 04/30/2009 10:12 AM
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Considering that the Samsung PB22-J is a MLC-based drive like Intel's X25-M, Samsung beats the crap out of Intel with write speeds.

Also, Register Hardware reviewed the same drive six weeks ago!
http://www.reghardware.co.uk/2009/ [...] mmd0e56g5/

rags_20 04/30/2009 12:54 PM
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@ 1st poster. It think they meant GB

krazyderek 04/30/2009 1:56 PM
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page 2 hard drive specs, 80-500gb??? shouldn't that be 2tb?? and price $100 for 320gb?? try $50 for 320gb or $80 for 500gb

xsamitt 04/30/2009 2:24 PM
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We used to get 3 and 4 new articles a day.Now it's been reduced to one.
I would think with all new teck in the market place we can find more than just hard drives to talk about.
As I mentioned before there are a new host of monitors out there.One that do 120htz and the response times have gotten better.It would seem the 24 inch monitors have been catching up to the smaller 22 inch counter parts in terms of speed.
This is the would be article you won't get for a long time I am afraid.

xsamitt 04/30/2009 2:33 PM
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What I also find odd is that there are more ads on Toms than before but they get rid of our avatars?I have to wonder why?

neapolis 04/30/2009 2:41 PM
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Thank You for making the "Table of contents" actually accessible!!!

Anonymous 04/30/2009 3:33 PM
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Place the table of contents in every page, not just the first. And put it at the bottom of the page, so you can use it after you read the page. Currently you read the page and have to scroll up to use it.

Anonymous 04/30/2009 4:01 PM
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This article avoids detailed discussion of the controllers used in the SSDs, does not emphasize the importance of small random write tests, and implies that OCZ does not have a product, when in reality the OCZ Vertex using the Indilinx controller has the second best performance to Intel at half the price. The JMicron controller is garbage. Read the vastly superior articles on AnandTech "The SSD Update" and "The SSD Anthology" for more information.

Anonymous 04/30/2009 4:06 PM
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Perhaps this is an irrelevant question, and you'll understand why in a moment, but would owning an SSD with a throughput of over 200 mb/s help in situations where the amount of available ram is exceeded? IE - in games where instead of writing to RAM, the program would have to write to the HD as virtual ram. Oftentimes I would notice a stuttering when a new area in a game was streamed from the HD when I didn't have available ram, would this effect be eliminated? (The reason I felt it was somewhat irrelevant would be because those of us who can afford to buy a $400-600 SSD drive can probably afford a few more gigs of ram - or would have the ram in the first place.)

kschoche 04/30/2009 4:11 PM
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Drop down list again please, forcing me to see all of your ads by removing drop downs, or having a dozen image pages instead of text only forces me to add more things to adblock.


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