Tom Nelson is an engineer, programmer, network manager, và computer network và systems designer who has written for Other World Computing,and others.

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Just how fast is that new drive sầu you hooked up to your Mac? Blackmagic Disk Speed Test is one of the không tính phí disk benchmarking tools available for your Mac that can give you the lowdown on your Mac"s disk tốc độ.


One of the simplest drive sầu performance tools lớn use.

Results in seconds.

Geared toward video pros, but works for anyone.

Free.


Doesn't provide extensive sầu performance information.

Limited configuration options.

No data logging for comparing multiple tốc độ tests.


If you tried lớn find out the tốc độ rating of a disk bychecking a manufacturer"s trang web, you might have sầu stumbled through kinh doanh materials that contained performance numbers with no context. That"s one reason to use the Blackmagic Disk Speed Test to lớn evaluate a Mac"s performance, including how well the internal or external storage drives perform.


Blackmagic Disk Speed Test started as a free utility included with any of the Blackmagic Design đoạn phim and audio products for multitruyền thông media capture, playbachồng, and editing. The không tính phí tiện ích became popular with Mac enthusiasts as an easy way to kiểm tra the performance of their system drives, fusion drives, và SSDs. While Blackmagic makes the ứng dụng freely available lớn anyone, its emphasis is on video capture và playback.


How khổng lồ Get the Blackmagic Disk Speed Test

Blackmagic released the tiện ích lớn the public via the Mac App Store, so visit the Mac App Store lớn tải về and install the Blackmagic Disk Speed Test.


How khổng lồ Run the Blackmagic Disk Speed Test

Here"s what khổng lồ do when you"re ready to kiểm tra a Mac"s internal or external drive:


Launch the Blackmagic Disk Speed Test from the Applications folder or by using the Launchpad on the Doông xã.


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In the left panel of the Finder screen, choose the disk or Mac volume you want to lớn thử nghiệm, then cliông xã Open.


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Cliông xã the Settings button, then choose the kích thước of the Stress file the application will use. Options range from 1 GB to 5 GB.

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The entire test takes about 16 seconds, but it repeats over và over again. To stop the test, clichồng Start again.


How to lớn Read the Results

Below the two main speedometers are the Will It Work & How Fast results panels. The Will It Work panel includes a list of common video formats, ranging from simple PAL and NTSC on up lớn 2K formats. Each format in the panel has multiple options for color bit depths, và individual read or write checkboxes. As a chạy thử runs, the panel fills with green checkmarks for each format, depth, and read and write speed that the volume under kiểm tra can tư vấn for đoạn phim capture and playbaông chồng.


The How Fast panel works the same way, but instead of checkboxes, it displays the write & read frame rates that the drive under thử nghiệm can tư vấn for each of the formats.


Test Size Options

Blackmagic refers lớn the chạy thử size as the ức chế size. It"s the kích thước of the dummy tệp tin the tiện ích uses for writing & reading. The choices are 1 GB, 2 GB, 3 GB, 4 GB, và 5 GB. The form size you choose is important. Ideally, it needs lớn be larger than any cabịt a hard drive may include in its design.


The idea is khổng lồ make sure the Disk Speed Test tests the write và read speeds khổng lồ the platters of a mechanical drive or the flash memory modules of an SSD & not the faster memory cabít used in the drive"s controller.


When testing the performance of a modern drive sầu, use the 5 GB găng size. In addition, let the thử nghiệm run through more than one write & read cycle. When testing an SSD, use the smallest stress kích cỡ, since you aren"t as worried about an onboard cađậy.


How to Test a Fusion Drive

When testing afusion drive sầu, it"s difficult to lớn predict where the Clip files will be stored, on the fast SSD or the slow hard drive. Nevertheless, if you want to lớn measure the performance of your fusion drive, use the larger 5 GB áp lực tệp tin kích cỡ and watch the speedometers closely.


When you start the thử nghiệm, you"ll likely see relatively slower write and read speeds as the first couple of tests are written to lớn the slower hard drive. At some point, your Mac decides the thử nghiệm tệp tin is one you use often & moves it to lớn the faster SSD. You can see this occur on the write and read speedometers.


The Actual Test

The chạy thử starts by writing the chạy thử file khổng lồ the target disk and then reading the test file baông xã. The actual time spent writing is limited khổng lồ an 8-second thử nghiệm, at which point the read kiểm tra starts, which also lasts for 8 seconds.


After the write and read cycle is complete, the demo repeats, writing for 8 seconds & then reading for 8 seconds. The test continues until you click the Start button again to lớn stop it.


The Results

The results are where the Blackmagic Disk Speed Test needs the most work. While the Will It WorkHow Fast panels provide key information that Clip professionals need, the two speedometers that measure performance in Mb/s only show the current instantaneous tốc độ.


If you watch the speedometers during a test, they jump around quite a bit. The speed displayed when you cliông chồng the Start button is only the speed at that one moment in time. You get no report of average speed or peak tốc độ. Even with this limitation, you get a reasonable ballpark figure for how fast the drive is performing.


Final Thoughts

Blackmagic Disk Speed Test gives a quiông chồng kiểm tra lớn determine how well a drive sầu performs. It"s also useful for measuring how external enclosures persize with the same drive sầu installed in them. Disk Speed Test works well khổng lồ quickly see how well a storage system performs.

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Even without the ability lớn log peak & average performance during a kiểm tra, the Blackmagic Disk Speed Test should be part of every Mac enthusiast"s suite of benchmarking tools.

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