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Written by Olin Coles   
Tuesday, 01 February 2011
Table of Contents: Page Index
Mushkin Callisto Deluxe Solid State Drive
Features and Specifications
Closer Look: Mushkin Callisto Deluxe
SandForce SF-1200 SSD Controller
SSD Testing Methodology
AS-SSD Benchmark
ATTO Disk Benchmark
CrystalDiskMark 3.0 Tests
Iometer IOPS Performance
EVEREST Disk Benchmark
HDD vs Hybrid Drive vs SSD
Mushkin Callisto Deluxe Conclusion

Iometer IOPS Performance

Iometer is an I/O subsystem measurement and characterization tool for single and clustered systems. Iometer does for a computer's I/O subsystem what a dynamometer does for an engine: it measures performance under a controlled load. Iometer was originally developed by the Intel Corporation and formerly known as "Galileo". Intel has discontinued work on Iometer, and has gifted it to the Open Source Development Lab (OSDL).

Iometer is both a workload generator (that is, it performs I/O operations in order to stress the system) and a measurement tool (that is, it examines and records the performance of its I/O operations and their impact on the system). It can be configured to emulate the disk or network I/O load of any program or benchmark, or can be used to generate entirely synthetic I/O loads. It can generate and measure loads on single or multiple (networked) systems.

To measure random I/O response time as well as total I/O's per second, Iometer is set to use 4KB file size chunks over a 100% random sequential distribution at a queue depth of 32 outstanding I/O's per target. The tests are given a 50% read and 50% write distribution. While this pattern may not match traditional 'server' or 'workstation' profiles, it illustrates a single point of reference relative to our product field.

The chart below illustrates combined random read and write IOPS over a 120-second Iometer test phase, where highest I/O total is preferred:

Iometer_Random_4K-IOPS_30QD_Results.png

From the onset, SandForce SSDs clearly outperform the competition when tested which a larger queue depth. In our Iometer tests, which use 32 outstanding I/O's per target and a random 50/50 read/write distribution, only the 'unrestricted' SandForce SSDs approach 50,000 IOPS. Mushkin's Callisto Deluxe promises 25,000 IOPS each way for a total of 50K, yet it delivers only 29,086. All of the SandForce-driven SSDs demonstrate the highest IOPS performance we've ever seen on a consumer storage device, and 'unlocked' firmware further extends the performance level to as high as 50,000 IOPS. Benchmark Reviews discusses this topic in more detail in our SandForce SF-1200 SSD Firmware Comparison article.

In our next section, we test linear read and write bandwidth performance and compare its speed against several other top storage products using EVEREST Disk Benchmark. Benchmark Reviews feels that linear tests are excellent for rating SSDs, however HDDs are put at a disadvantage with these tests whenever capacity is high.



 

Comments 

 
# RE: Muskin Callisto Deluxe Solid State DriveRobert17 2011-02-01 23:37
Well thanks again Olin. Nice review. The more SSDs you test, the more crowded the competition becomes to the advantage of the end user. All is well in the SSD-verse. (PS, forgot the site, but I did see a "sale" item on an SSD, 64Gb @ $84 last week. $$ Looking better all the time.)
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# Waiting,.......RealNeil 2011-02-02 07:06
Good look at SSD's. Thanks for your time and effort putting this all together Olin. I'll refer back to this info when I'm ready to buy more of these drives. I'm still waiting for SSD Prices to come down a little more. I only have one of them, an OCZ Agility-2 that is seriously fast, but I can't afford to put one in the other computers yet.

Maybe SSD makers could learn a lesson from Amazon, whereby they lowered the prices of their Kindle Readers and then had the very best sales and profits that they have ever recorded in the last quarter of 2010.
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# Garbage collection (of words)Ron 2011-02-02 16:58
I would re-check your facts about GC being as bad as defragging aN SSD drive. Yes, it will add some extra wear, but this would be nothing on the order of a full defrag. When these drives are used in a situation where TRIM is not available, then GC is the only solution available. I am very wary of their speeds when in a "dirty" state, and how a normal home desktop user would really be affected. I think cheap Slow long lasting SSD would be great(direct competitor to hard drive) simply for the Noise, power and space requirements. £/GB equality.
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