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NOT another HDD vs SSD debate, take me serious

post #1 of 6
Thread Starter 
Ok, I know this question can sound like a complete and utter echo of a million other threads but hear me out. This is true confusion and curiosity.

I'm a junior operations technician for a tech company and we just bought another IBM V7000 and bought a CRAP ton of 146GB 10,000rpm 2.5" disks. we also bought 2 300GB IBM SSD's that were obnoxiously expensive. like image a cost of what the old intel SLC ssd's were and add a 0. it was STUPID! MY QUESTION...IBM's SSD's are cMLC with 20,000IOPS with a 1 year expected life! what is stopping me from getting a bunch of 250GB intel 510's with a <3% fail rate for the cost similar to the 10,000RPM drives?! I don't understand!? Don't answer me unless you know what you're talking about. (not to be a jerk, i just don't want to hear "they enterprise grade" tell me what the REAL differences are.)
post #2 of 6
Sub'd for curiosity.
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post #3 of 6
Your bosses are idiots?
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post #4 of 6
Quote:
Originally Posted by TheCondor13 View Post
IBM's SSD's are cMLC
Actually, the IBM SSD made available in the Storwize unit is a 300GB E-MLC model (#3504).

http://www.stec-inc.com/whitepaper/differSSD.pdf
Edited by jlells01 - 10/13/11 at 4:10pm
post #5 of 6
Thread Starter 
Amazing article @jlells01. Answered my questions perfectly.

To keep people from having to go through the article if they'd rather just skim through I'll summarize:

Aside from the obvious they go through more thorough testing prior to release they have more internal reliability. Here's an instance. When a consumer HDD takes information it puts it in it's buffer and has it cached where it then moves it to the allocated blocks on the disk. As the data is moved to the blocks on the disk it in turn removes it from the cache. An enterprise HDD would keep the data on the cache until it had COMPLETELY copied it, not just moved it, to the blocks in case something went south during the move it doesn't loose the data. That is the difference between consumer and enterprise HDD's. Now for the SSD's, NAND Flash is funny stuff. Much like ram it uses the voltage/electricity to change the state of a block. A consumer SSD with its consumer grade NAND Flash has been tested to support it's 10,000-40,000 IOPS in a burst fashion. It can't handle a sustained transfer rate (high voltage) for a long before it begins to slow down (needless to say when running a database, you can't afford to slow down) So an OCZ Vertex 3 might have 40,000 IOPS but only for an unknown amount of time. IBM, in this situation, garentee's the NAND Flash can retain it's 20,000IOPS indefinitely (or so they say)

The article didn't say all of this, but I was reading the article I started doing other research and found the other information. But after the article, I knew where to look so thanks again for that link @jlells01!
post #6 of 6
That's pretty cool, I never did get this either, but now it makes more sense
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My Current Rig
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My Dream Rig
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