Tom's Hardware also has a bit of good information on SSDs, along with
Desktop vs. Enterprise performance analysis.
The latest roundup:
http://www.tomshardware.com/reviews/ssd-x25-m-vertex,2399.html
Other articles:
http://www.tomshardware.com/reviews/ssd-6gb-raid,2388.html
http://www.tomshardware.com/reviews/ssd-performance-power,2279.html
-Nate
On Wed, 16 Sep 2009, Nicholas Tang wrote:
As someone else noted, the Intel X-25E performance is much higher than the
averages you posted below. (Approx. 250MB/s reads, 200MB/s writes, and
latency around 1/2 of what you had there, I believe*.)
So, yes, if you buy the "good stuff", it blows normal disks out of the
water.
Nicholas
* - http://techreport.com/articles.x/15931
On Wed, Sep 16, 2009 at 2:28 AM, Edward Ned Harvey <[email protected]>wrote:
Today I poked around looking at specs of SSD’s and 7.2krpm SATA hard
disks. I just sampled a bunch of whitepapers on various drives and averaged
the results together. Also, when there wasn’t an apples-to-apples
measurement to compare, I had to calculate, as evidenced by the IOPS versus
avg seek time.
The comparisons were pretty surprising, to me –
Sustainable reads: SSD somewhat faster (avg 199MB/s compared to avg 126
MB/s)
Sustainable writes: SSD equal to SATA (avg 124MB/s compared to avg 126
MB/s)
MTBF: SSD equal to SATA. 1.17 vs 1.20 million hours
Read latency: SSD way faster (0.16ms vs 8.5ms) (which I derived from 6300
IOPS and 8.5ms avg seek time)
Write latency: SSD somewhat slower (12ms vs 8.5ms) (which I derived from
84 IOPS and 8.5ms avg seek time)
Actually, I’m not sure how fair the MTBF is. Because a SATA drive will
eventually fail just from being powered on, while the life of a SSD is
basically determined by how much you write to it.
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