The contents of the download are original and were not modified in any way. This Mac program is distributed free of charge. The download was scanned for viruses by our system. We also recommend you check the files before installation. The download version of AJA System Test para Mac is 12.3.7. Additionally, AJA System Test Lite for drive-only analysis is available for free on macOS on the Apple App Store. Note: The downloads for System Test Lite v12.5 from this page are for the Apple Store and Windows standalone versions of System Test.
This is a free GFX RAM and system RAM speed benchmark application. AJA System Test. Who we are; Terms.
Just a quick note on possibilities available to do some bench-marking of NAS performance. Quite often Blackmagic Disk Speed Test or Intel NAS Performance Toolkit are being used for this. But there are some problems with those: first one is nice and cool but for Mac only, second is good but no longer supported by Intel as it reached its EoL.
So if you look for the other options you may use the following:
ToTu Soft LAN Speed Test – they have commercial and free versions, and promise to deliver Mac OS release soon.
NAS performance tester by Ulrik D. Hansen, absolutely free and with source code available (though it only measures read/write speed values).
I really liked this last option as it is portable and allowed me to do some quick tests against iSCSI target hosted on my Synology DS415+ (gigabit Ethernet connection; 1 drive only, no RAID, both data and header digests enabled). You may see test results below.
Using 400 Mb file:
The same test run a bit later with both header and data digests disabled:
![Aja System Test Mac Download Aja System Test Mac Download](/uploads/1/3/4/1/134124439/131560510.jpg)
Using 8000 Mb file:
![Aja System Test Mac Download Aja System Test Mac Download](/uploads/1/3/4/1/134124439/584844496.png)
And here is the same test with digests disabled:
Of course this is quick and dirty measurement, but at least now I have some baseline and tool to measure how changes in my infrastructure or its configuration influence performance. For example I saw interesting reports that NFS share on Synology outperform iSCSI target (at least in terms of IOps), and in other source there were graphs showing negligible performance cost of iSCSI digests (alongside these graphs that material emphasized importance of data integrity you gain with digests), but it will be nice to verify all these claims.
UPDATE (20.03.2015): I did the same tests with disabled digests (see additional screenshots above), so performance cost is not entirely negligible, especially for read and for large chunks of date.
Blackmagic is now faster enough to rate internal SSD speeds, even the Startup Disk
Blackmagic has been updated to adequately report the speed of SSD devices.When Blackmagic tries to read the Startup Disk, you get the message that the device is not writeable, hence you cannot rate the the transfer rates of the drive.I found a workaround that will report the rates of the Startup Disk. Its quite simple. Create a disk image (.dmg) using the disk utility specifying file->new image->blank image. Make it big enough for Blackmagic to work with (7+ GB) and name it what you will. Mount the volume (if it is not already mounted).In Blackmagic select the disk image mounted. Since the “volume” is on your Startup Disk, you will see how fast it drive is. On my 2016 MacBook Pro, I am seeing speeds like 1,000+ MB/s write, and 1100+ MB/S read. I have tried this on my older mackbooks with SSD and they do scale down as the device is older. On an older MacBook Pro the rates I see are 500 MB/S both read and write, as you would expect.I have run Blackmagic on USB 2, thumb drives, USB 3, and USB C devices to see if I’m getting my money’s worth. You can easily detect when a device is performing subpar and, and with the spinning disk, you can see is transfer speeds deteriorates over time.