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All replies
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Helpful answers
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Apr 30, 2016 5:10 PM in response to rodion15by Rudegar,disc transfer speed don't depend on memory amount or cpu speed
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Apr 30, 2016 6:51 PM in response to rodion15by steve359,HD-to-SSD change has other effects. HDs are spinning platters with a read/write head seeking much of the time. SSDs have faster seek times because of direct addressing. Also the "swap file" that used to be moved to/from in addition to the R/W-head seeks is changed to direct-access R/W of an SSD.
Startup should be faster, and opening applications should be faster.
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May 1, 2016 1:22 AM in response to rodion15by lllaass,Something seems wrong.
What SSD did you install?
What does system profiler shows about the dis and the disk control?
Go to SATA/SATA Express in profiler
OS X: About System Information and System Profiler - Apple Support
and post a screens shot when the controller is selected
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May 2, 2016 5:51 AM in response to rodion15by VikingOSX,A current third-party SATA 3 SSD should be showing over 500MB/s read and write performance. As has been noted, something is not correct with your getting the results that you posted. Depending on the brand, it may require a firmware update for improved performance, and/or OS X compatibility.
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May 4, 2016 4:11 AM in response to rodion15by woodmeister50,This doesn't really solve your problem, but as a reference, I have a Kingston v300
SSDNow drive installed in my 2011 Mini Server. I get reads ranging from 300-450
megabytes/second writes ranging from 180-250 megabytes/second. One thing, these
are not the speediest SSDs on the market, but are faster than an HDD.
Something to note, running the speed test on an active boot volume (depending on the app)
can give wildly variable results as it will typically be competing with other system accesses.
I ran the test multiple tomes to get the range that I reported.
If possible, you may want to create a clone to an external drive, boot to it, and then redo the test.
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May 4, 2016 6:54 AM in response to rodion15by lllaass,The link speed is 6 GB/sec which is correct..
You either have a bad drive or as woodmiester said running the test on a boot drive may be the cause of the low speeds.
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May 5, 2016 4:23 AM in response to woodmeister50by rodion15,Thanks mate. Well, I ran the test as you say also, from an external hard drive and the internal SSD as target, same result. These are the specs of the mac mini:
Model Name: Mac mini
Model Name: Mac mini
Model Identifier: Macmini7,1
Processor Name: Intel Core i5
Processor Speed: 1.4 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache (per Core): 256 KB
L3 Cache: 3 MB
Memory: 4 GB
Boot ROM Version: MM71.0220.B06
SMC Version (system): 2.24f32
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May 5, 2016 4:48 AM in response to lllaassby rodion15,sorry what do you mean "woodmiester"?. I tried running the test off an external usb bootable Yosemite hard drive, same result.
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May 5, 2016 10:51 AM in response to rodion15by Mac User #330250,As already mentioned something is wrong. You should try to update the firmware if a newer one is available. If you cannot get it faster you should return it and/or get a warranty replacement.
BTW, you should enable TRIM. In Terminal, issue the command "sudo trimforce enable". You will have to enter your password. Afterwards TRIM should be enabled also on 3rd-party SSD drives, which you should see in System Profiler as "TRIM Support: Yes".
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May 9, 2016 11:14 PM in response to Mac User #330250by rodion15,I enabled TRIM, but it did nothing. Thanks your your answer.


