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The Tests: Random, Sequential, DVD and Idle

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1:40 AM - 07/14/2008 by Patrick Schmid and Achim Roos

Test 1: I/O Performance

The first test run utilizes the IOMeter workstation profile to stress the drives with a benchmark profile that is based on 80% read, 20% write, 80% random and 20% sequential access. The profile is based on an 8-KB block size and it delivers an average result of I/O operations per second during a defined part of the duration of the benchmark.

ssd hard drive

Test 2: Streaming Reads

Our second run also utilizes IOMeter, but this time we use a profile that executes only sequential reads. We use an equal distribution of 64-KB, 128-KB and 256-KB blocks here. The result represents the average amount of I/O operations per second for the given sequential workload.

ssd hard drive

Test 3: DVD Video Playback

A lot of people requested we run a test that would put the drives under a controlled load, such as a data stream for DVD video. We used the VLC player and broke out the good old Terminator 2 VOB file we’ve used in the past. We determined average power by measuring from second 1,000 to second 2,000 of the VOB file.

Test 4: Drive Idle

Finally, we wanted to know the idle power of all drives, since many people criticized how the Hitachi drive had an idle power high enough to invalidate some of the test results. As a matter of fact, different hard drives have different mechanisms to save power. And the Hitachi drive we used even has a power-saving state that can be applied while streaming DVD data. You’ll find more information in the appropriate benchmark section.

ssd hard drive We switched off the drive power saving options in Windows Vista to determine the actual hard drive idle power.

Talkback
Xeus32 07/14/2008 9:41 AM
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Xeus32 07/14/2008 9:43 AM
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-1+

Flash SSDs do not inherently contribute to increasing battery life and better efficiency comes with the appropriate Flash SSD used for a specific application. "Flash SSD" is not a qualifier for efficiency or performance.

swiftpulse 07/14/2008 12:02 PM
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-1+

This is much better than the first article now. Specially the DVD playback is interesting.

swiftpulse 07/14/2008 12:06 PM
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The 64GB OCZ seems to be an amazingly exceptional drive.

bloodymaze 07/14/2008 1:37 PM
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--3+

Hahaha. Once again contradicting yourself as Xeus pointed out.

JPForums 07/14/2008 3:13 PM
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-10+

Kudos to Tom's for having the decency to admit their mistakes and revise the article. The results, while not extraordinarily different than the previous article (discounting newcomers) provided a much more complete picture of the advantages and disadvantages of SSDs.

Articles like this one are a necessary step to regaining some of the lost credibility from previous articles like in this scenario. (Though it would be better if the articles didn't need revision) In short, it is encouraging to see that Tom's is listening to the readers. IMHO the real enthusiasts are more concerned with well thought out procedures, and accuracy/completeness/comprehensiveness of results than reading the "We posted first" articles that are all to easy to find on the internet.

dragunover 07/14/2008 3:23 PM
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iLOL
I like when people talk about the power inefficiency of hard-drives,yet don't blame things like CPU's,or discrete GPU's in their laptops.

However,I would like to see this as a high power part in desktops sooner or later,but with of course more power and(hopefully) stellar reliability.
And I mean for under 300 dollars.

dragunover 07/14/2008 3:25 PM
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Anonymous 07/14/2008 4:34 PM
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Anonymous 07/14/2008 4:39 PM
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Dragunover - no one is refuting the fact that the CPU/GPU will be power hungry... that's not what is under discussion here. i'm interested by the fact you seem to be asking for SSDs that consume more power...?

Igot1forya 07/14/2008 4:51 PM
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-7+

Ziria, Wattage (P) is calculated by multiplying Voltage (V) by Amps (A).

Hence, the only important number is Wattage.

MDillenbeck 07/14/2008 5:10 PM
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-3+

This article demonstrates that too often people generalize from specific test data.

Whether SDD or HDD, how you use your electronics device will influence how it much power it consumes. To conclude that one drive uses less power because a specific test does is an inaccurate conclusion - the testor can only state that it uses less power under those given circumstances and that is most likely will hold true under similar circumstances. (For example: this test is for random read/write operations, so the results most likely will be true for most applications that follow that pattern of disk usage.)

My point? Many times reviewers do not have the time to evaluate a product in depth, and thus they should not make broad generalizations or exaggerated claims.

Hopefully Tom's will keep up with in-depth reviews for a variety of users - road warriors (office apps/web/email), multimedia entertainment (DVD/video streaming apps/music playing), gamers, and "typical home users" - and creating good summary tables of their findings.

Myself, I find the IOs/Watt information especially valuable. I'll use that to find the IOs/Watt/$ when evaluating my future purchases. I'm kinda curious how the SSDs stack up against each other in that category (and I'm sure the HDDs are still waaaaaaaaaaayyyyyyy ahead of the SSDs right now).

demonhorde665 07/14/2008 7:45 PM
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to me teh argument isnt so much a "efficency" issue , to mee flash SSd's represent a future in computing where we don't have to replace , storage devices every 5-6 years (this is assuming you are getting agood high quality hard drive ) old mechanical hard drives (the current standard) fail after about 5-6 years to date the longest livinf hard drive i have is at 6 and i'll be amazed it it last half another year./ Also note you can cut this hard drive life expectancy in half if you smoke around your computer or you ahve a dusty home like many peopel in more rural areas. This hard drive death is soemthign that can't be stoped as the metal paltes require mechanical parts to spin them , and like any motor the parts will wear outa nd eventually stop working all together. Now fast forward to when they have SDD's that range in a better size (like at elast 250 gb) i can see these drive replacing even desk top hard drives , simpply for teh reason ... They HAVE NO MECHANICAL PARTS THAT WEAR OUT ! what this means is essientially many of use computer geeks taht are hard put to lose a comp jsut because it is old , will not have to replace these parts , recently i gave my mom my old alienware (that is now 6 years old) and i know before the year is out i will be replacing her hard drive on it , but with an SSD's i wouldnt ahve to , the only issue with SSD's is their extremely High price for drives thet come remotely close to desk top hard drive sizes (last time i looked a good 128 gb one , goes for around 4,000-5,000 dollars) the alienware has a 200 gig , to just fill that capacity you are looking at any where from 8,000 to 10,000 dollars. yes i think these drives are the future of long term storage devices in ALL computers , but for the time that future is expensive at the moment. i say give it 10-15 years before you see SSD's at the same cost as old magnetic HD's

Fadamor 07/14/2008 8:50 PM
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demonhorde665 :
to me teh argument isnt so much a "efficency" issue , to mee flash SSd's represent a future in computing where we don't have to replace , storage devices every 5-6 years (this is assuming you are getting agood high quality hard drive ) old mechanical hard drives (the current standard) fail after about 5-6 years to date the longest livinf hard drive i have is at 6 and i'll be amazed it it last half another year./ Also note you can cut this hard drive life expectancy in half if you smoke around your computer or you ahve a dusty home like many peopel in more rural areas. This hard drive death is soemthign that can't be stoped as the metal paltes require mechanical parts to spin them , and like any motor the parts will wear outa nd eventually stop working all together. Now fast forward to when they have SDD's that range in a better size (like at elast 250 gb) i can see these drive replacing even desk top hard drives , simpply for teh reason ... They HAVE NO MECHANICAL PARTS THAT WEAR OUT !


Not true. Flash SSD's suffer the same flaw as your typical Flash "thumb drive"... The recording medium fails after X number of writes. They've added technology in the controllers to extend the drive's life by spreading the writes around the drive's landscape, but the drive WILL fail eventually... even if you treat it with kid gloves.

gxsolace 07/14/2008 8:55 PM
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Wow. Pretty rare these days to see a big publication go out and admit a mistake and even make a big public apology. kudos to you guys.

uday_ananth 07/14/2008 9:03 PM
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hard disks have been here for ages.. give ssds some more time and only then we can actually evaluatethe differences..

hergieburbur 07/14/2008 9:29 PM
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Wow, I have to admit, I did not expect Tom's to admit their errors in the last article. I am glad they did though, and this one looks to be much more along the lines of what we would expect to see. Props for having the gut to admit your mistake Patrick and Aaron.

Anonymous 07/14/2008 10:10 PM
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All that really matters to me in regards to these articles, is that i'm not going to notice any difference in battery life while using my lapop. I could however expect to enjoy the speed if i got a good SSD.

gwolfman 07/14/2008 11:06 PM
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-1+

Nice job Tom's. I thoroughly enjoyed this article a lot more than the previous one. It seems like the last one way maybe rushed. Either way, thanks for keeping things legit and up to (at least my idea of) Tom's quality standards. Thanks again!

shadowmaster625 07/14/2008 11:15 PM
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so where are the benchmarks for OCZ Core Raid-0?


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