- #Yosemite mac os ssd trim drivers
- #Yosemite mac os ssd trim windows 7
- #Yosemite mac os ssd trim windows
#Yosemite mac os ssd trim windows
Firstly, OS X and Windows use different file systems, and the file system plays a key part in SSD performance degradation - we're essentially talking about the problems involved when files are written to areas of the disk that have already been filled up. Two things stand out for us as being the cause. The Corsair P128 was included in our TRIM article, and suffered from its fair share of performance degradation, It's a Samsung design from 2008, and as such, in all likelihood very close to the Corsair P-series. We next considered that perhaps the SSD in the Macbook Air had some radically different design that rendered it immune from TRIM - but it doesn't. Apple's description of the zeroing format method we used fits the description of what we wanted in terms of resetting the SSD to a clean state, and we followed the exact same procedure in terms of creating the used disk that we have previously - the same procedure that results in huge performance degradation if TRIM isn't involved.
#Yosemite mac os ssd trim drivers
We considered drivers being an issue, but using official Mac hardware and an official OS should of course take of that.
We ran Quickbench on multiple Macs, and as you can see, it's perfectly capable of recording the differences between a hard disk and an SSD. We are new to Quickbench, but in all our testing for this article (only some of which is published much was preparatory), Quickbench's results were reliable and repeatable. We considered whether the tests were flawed, and of course it's possible, but it's hard to see where. The Macbook Air's SSD appears not to suffer from any performance degradation whatsoever, even after heavy use
#Yosemite mac os ssd trim windows 7
While we know SSD performance is affected by the OS - after all, you need Windows 7 for TRIM support - but for OS X not to suffer from performance degradation when it's using an SSD seeming stunning to the point of being difficult to believe. It's very, very curious and absolutely not what we expected. The Vertex's random write speed drops from 9.8MB/sec to 4.93MB/sec without TRIM - the Macbook Air's random write speed remains constant, at 5.6MB/sec. Consider the Indilinx powered OCZ Vertex: without TRIM, its sequential read speed of 1,024KB files plummeted by astonishing 47 per cent - from 258MB/sec to 138MB/sec. These differences are absolutely miniscule compared to the SSDs we tested in Windows. In the sequential read tests, the difference in average transfer speeds between the two states of the SSD aren't even 2MB/sec - even when looking at sequential writes, the difference is only 2.3MB/sec, or around six per cent. There are some differences when it comes to random writes: the two drives write 4KB files identically, but the clean drive writes 64KB files 1MB/sec quicker, and the larger 1,024KB files which the clean drive writes 9MB/sec faster. The random read tests are impossible to tell apart - there's no difference at all between the clean and dirty drive when you look at the random read speeds, with the two ending up in a dead heat. Results Analysis - Does OS X need TRIM?Our test results appear just as conclusive as those in our original TRIM article: across the majority of our tests, there's very little difference between the clean SSD and the one that's been used.
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