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Old September 13, 2009, 09:18 AM
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Default Samsung SSD slowdown

We all know that SSDs slow down after all the cells have been written to, but I was kinda shocked at the figures for the Samsung controller used in the OCZ Summit.

Typical 4KB writes are about 50% faster than for the Barefoot-based Vertex when new but when "used" it's a completely different story. These figures are from Anand:

4KB Random Write Speed________ New_________ "Used"
Intel X25-E ____________________________________31.7 MB/s
Intel X25-M___________________ 39.3 MB/s______23.1 MB/s
JMicron JMF602B MLC___________ 0.02 MB/s______0.02 MB/s
JMicron JMF602Bx2 MLC_________ 0.03 MB/s______0.03 MB/s
OCZ Summit___________________12.8 MB/s______0.77 MB/s
OCZ Vertex____________________ 8.2 MB/s______2.41 MB/s
Samsung SLC__________________ 2.61 MB/s_____0.53 MB/s
Seagate Momentus 5400.6_______ 0.81 MB/s______ -
Western Digital Caviar SE16______ 1.26 MB/s______ -
Western Digital VelociRaptor______ 1.63 MB/s______ -

Obviously the expensive Intel controller still rules, but the Samsung looks really bad. Indilinx managed to improve the small-file transfers of the original Barefoot with aggressive firmware updates under the urging of Anand Lal Shimpi and OCZ's Ryan Peterson but the Samsung-based SSDs I've seen don't allow for reflashing.

I'm glad I didn't pony up the cash for a Samsung without seeing this first.

Last edited by JimboToronto; September 13, 2009 at 09:37 AM. Reason: Reformat table
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Old September 13, 2009, 09:33 AM
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Glad you did that Jimbo. But here is a link to the graphs:
AnandTech: The SSD Relapse: Understanding and Choosing the Best SSD
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Old September 13, 2009, 09:42 AM
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Originally Posted by Squeetard View Post
Glad you did that Jimbo. But here is a link to the graphs:
AnandTech: The SSD Relapse: Understanding and Choosing the Best SSD
Thanks. I'd just copied and pasted the chart only but it reformatted and omitted all the spaces. I guess I should have just posted a link to the whole page.
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