How to Test Read Write Speed to Nas
Reading and writing files to and from a difficult drive is ane of the most crucial choke points in a PC. Ownership a new internal hard drive can make apps load faster and shorten system bootup times, while springing for a new external bulldoze could shave minutes off your next routine backup or the transfer of your large drove of photos and videos.
A hard drive'south speed can vary significantly based non only on its theoretical top transfer speeds, only besides on your usage patterns. And so we've designed our drive-testing procedures at PC Labs to judge the speeds you can expect while accomplishing a comprehensive array of common tasks: reflecting both all-time-case scenarios, and real-world utilize.
We test external drives using an Intel X299-based testbed equipped with all the trimmings, including a USB 3.1 Gen 2 USB Type-C port. We also exam on a 2016 MacBook Pro, using the Type-C/Thunderbolt 3 ports, for certain of our tests.
PCMark vii Secondary Storage Test
Our most wide-ranging criterion is the PCMark 7 Secondary Storage exam. Information technology comes from UL (formerly, FutureMark). The company's benchmarking apps are used not only by publications like PCMag, but also by drive and PC manufacturers themselves.
The Secondary Storage test is trace-based, which means it measures how quickly software commands are performed during everyday workloads to which you might bailiwick your PC. These simulated workloads include a Windows Defender virus scan, an image-import task, a video-editing session, and application launches.
The PCMark 7 Secondary Storage test results in a proprietary score that is usually in the thousands. We mention this score in each review and compare it with the scores that other, competing drives received. The score is only meaningful relative to other scores.
BlackMagic Disk Speed Examination
Our next examination measures a bulldoze'due south throughput in $.25 per 2nd. Nosotros use the macOS-only BlackMagic Disk Speed Exam app from professional media software firm DaVinci to perform this test. This utility is typically used to discern whether a given bulldoze has enough throughput to play back specific video formats smoothly. But information technology also returns some useful throughput measurements.
BlackMagic offers both a read score and a write score, which we too compare with those of other, like drives. These scores are useful in discovering the theoretical maximum speed that a drive tin achieve.
Crystal DiskMark 6
Nosotros besides use the Crystal DiskMark utility for a second stance on throughput. Crystal DiskMark'due south sequential-read tests measure read/write activity with data written in a large face-to-face cake on the drive, which is similar to how manufacturers themselves test drives to advertise their performance.
We likewise use Crystal DiskMark's 4K tests to measure random reads/writes, which reflect data activity in which the bulldoze is fetching and writing scattered files and pieces of files across the hard bulldoze or solid-state drive.
Folder Transfer Test
The final examination for external drives is a drag-and-driblet test. It uses the Windows Explorer or macOS Finder to re-create a 1.23GB examination binder full of several different file types from the testbed'southward internal bulldoze to the external hard drive being tested. We hand-fourth dimension the scores (in seconds).
Nosotros perform each of these tests using all of the interfaces that the drive supports. For most electric current drives, that ways we almost always perform i round of tests using USB 3.0 (either via Type-A or Type-C connectors, of the fastest kind the drive supports, say, USB iii.1 Gen 1 versus Gen 2). If the drive supports Thunderbolt 3, we run the tests using that interface, as well.
Network Attached Storage & Internal Drives
The process for testing internal drives is slightly unlike. We mountain the bulldoze in our testbed using its native interface and ready information technology upwards as a secondary drive. Nosotros never install arrangement files onto the internal drive we're testing. Internal SSD and hard drive testing is done strictly on our Intel X299-based testbed, employing the native SATA ports or ane of the M.2 PCI Express x4 slots, in the case of PCI Express K.ii SSDs.
Internal Drives: PCMark 8 Storage, Crystal DiskMark & AS-SSD
Beginning, we run the PCMark Storage test (in this example, PCMark eight's Storage test, instead of PCMark vii's) for a loftier-level view of how the bulldoze volition function under various everyday workloads like discussion processing, videoconferencing, and the like. Similar PCMark 7, it generates a proprietary score meaningful relative to other scores.
Next, we run the Crystal DiskMark utility equally described above.
Finally, we use Every bit-SSD'southward copy tests to simulate moving different types of files from ane location on the drive to some other. This is very similar to the folder drag-and-drib test to a higher place that we employ for external drives, only it'due south slightly more comprehensive since AS-SSD offers 3 different transfer tests: a sample game-install folder, a programme folder, and a single big ISO file.
Testing NAS Drives
Because a wide range of network conditions outside of our control can affect the functioning of network fastened storage (NAS) devices, we only perform a folder transfer test on these devices. The specific hard drives installed in a NAS are also a big variable, if you're looking at a NAS bulldoze that doesn't come up pre-populated with drives.
This test uses a different folder from our internal and external bulldoze tests, comprising 4.9GB worth of music, video, photograph, and office document files. We hand-time how long information technology takes to transfer the folder to the NAS via a wired connection, as well as how long it takes to transfer the file from the NAS dorsum to our testbed.
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Source: https://www.pcmag.com/about/how-we-test-hard-drives
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