14 May, 2008
Solid State Hard drives have poor random write performance
Posted by Bhavin Turakhia
I just learned the hard way as to how *poor* the *poor random write performance* of Solid State Drives actually means. I recently bought a new Dell Latitude D430 and the laptop keeps freezing every now and then for a few seconds. It is fairly irritating and a quick look at my performance monitor shows ample available RAM and the CPU utilization is next to nothing. I figured the only possibility was some sort of I/O blocking.
Having spent a considerable amount of time on building large scale storage infrastructure, I am well aware of the limitations of solid state hard drives when it comes to random writes in large files. However I am facing a first-hand experience of actually witnessing the poor performance.
A quick google serach revealed that I am not the only one facing this issue -
http://www.codinghorror.com/blog/archives/000927.html
Excerpt: I recently bought a dell d430 with an SSD and it was useless, reason: Poor random write performance. The user in question had a multi-GB outlook mailbox and the machine would constantly freeze for 5-50 seconds while the HD was doing IO blocking as it shifted blocks around. Had to replace with a standard technology 1.8″ drive now all is well. $500 out the window.
Other Links:
http://www.destinationip.com/index.php/C6/
http://office-outlook.com/outlook-forum/index.php?t=msg&th=75897/
Interesting.. So does Apple’s MacBook Air with Solid State drives would also have the same problem?
Your problem is that your partition(s) aren’t aligned correctly, this leads to severely decreased write performance. See the following thread on OCZ forums for more info:
http://tinyurl.com/26wu7zl
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