All of Synology's current NASes operate using DiskStation Manager 6. Synology provides a good overview of the DSM 6.0 features here. While Synology doesn't provide an online emulator, there are a lot of videos in their Knowledge Base that can help familiarize you with the features of DSM 6.0. You can also download the DSM 6.0 user guide.
The screenshot below shows the DSM 6.0 Control Panel.
Synology DSM 6 Control Panel
DSM 6.0.2-8451 Update 6 firmware was loaded onto the DS216j and performance tests were run using the Revision 5 NAS test process. All tests were run using the supplied 2 TB Seagate NAS drives. For performance comparisons, I'm using the same products that were included in the Key Component summary table above. All three NASes were tested using the EXT4 file system.
Keep in mind the DS216 data was taken back in 2015, with the Marvell CPU was clocked at 1 GHz. Today's DS216 is clocked at 1.3 GHz, so some results could be higher.
The benchmark summaries below show the individual test results for each of the three selected products. For all three products, both the RAID 0 and RAID 1 File Copy Write and Read benchmarks were fairly consistent with the exception of the ASUSTOR RAID 1 File copy read, which fell below 100 MB/s with a throughput of 94.5 MB/s. Similarly, both RAID 0 File copy Read Performance and RAID 1 File copy Write performance for the DS216j were also below the consistent 100 MB/s turned in by the DS216.
NASPT File copy to NAS and File Copy from NAS were similarly consistent for both RAID levels with the exception of RAID 1 File Copy to NAS for the Synology DS216j which fell just short of 100 MB/s at 99.3 MB/s. Most of the other NASPT test results were similar across all three tested NASes with the exception the NASPT HD Playback & Record and NASPT 4x HD Playback tests. For these two tests, the DS216j outperformed the other two NASes for the RAID1 tests as well as on the RAID 0 4x HD Playback. For RAID 0 NASPT HD Playback and record, all three NASes were within 1% of each other.
None of these three NASes have eSATA ports, so no eSATA results appear. The DS216 was to the only one of the three that had both USB 2.0 and USB 3.0 ports, so results were reported for both interfaces. As you can see from the charts below, the DS216 significantly outperformed the DS216j for backup to USB tests for all three filesystems tested. And both Synology NASes smoked the ASUSTOR AS1002T for all filesystems for Backup to USB tests. The DS216 also edged out the other two NASes for the Network backup tests as well as for iSCSI Write to Target. Surprisingly, the DS216j outperformed its more powerful sibling by 20 MB/s for iSCSI Read from target.
Benchmark summary comparison
Synology recently changed backup software. In previous versions of the OS, the backup utility was built into the operating system. Now, you back up to attached USB storage or to remote network servers using Hyper Backup - a separate package you download and install on your NAS. DSM Help describes Hyper Backup as follows:
"With Hyper Backup, up to 65536 versions of data can be retained while storage consumption is minimized with cross-version deduplication. Data backup are kept in a proprietary database which can be easily browsed, downloaded or restored with a tailor-made multi-version explorer on DSM, Windows, and Linux platforms."
Here's a video demonstrating file retrieval using Hyper Backup Explorer.
The screenshot below shows the available backup destinations in the Hyper Backup wizard. We initially chose the Local Shared Folder and External Storage and Remote rsync Server options found on the top row, with disappointing results significantly below what we found with the DS216. After scrolling down, we found the Local Data Copy and Remote Data Copy that yielded higher performance, more in line with expectations. The performance difference is likely due to the versioning and deduplication features provided in the top row options.
For NTFS attached backup, the Local Data Copy option turned in more than three times the performance of the default option. (51 MB/s vs 16 MB/s). Similarly, for network backup, Remote Data Copy yielded more than twice the throughput of the Remote rsync Server option. (46 MB/s vs 20 MB/s). The test results in the NAS Charts used the Local Data Copy and Remote Data Copy methods.
Synology Hyper Backup Wizard destinations - all
The chart below shows the individual and category scores for the same three NASes used in the benchmark summary above. For Write benchmarks, the DS216j ranked #4 trailing behind the other two NASes which were tied for #3. For Read benchmarks, the DS216, ranked #2 clearly outperformed the other two which ranked #7 (DS216j) and #6 (AS1002T). For the mixed Read/Write category, both Synology NASes tied for #3. Surprisingly, the DS216j tied with the AS1002T for Video and outperformed the DS216. The DS216j had its only category win for iSCSI mostly because it outperformed the other two NASes on the iSCSI read test.
Ranker Performance Summary comparison
The NAS Ranker below was filtered for RAID1 and Revision 5 method and sorted by ascending price. As you can see, the DS216j, with a Total NAS ranking of #6 represents a very good value. The ZyXEL is the only 2-bay NAS with a lower price, but it has a significantly higher (poorer) Total NAS rank.
RAID 1 Total NAS Rank - Sorted by price
While we haven't tested Synology's entry level DS216se, it's currently priced at $150, $20 less than the DS216j. With a slower processor, you can expect it to turn in somewhat slower performance than the DS216j. But you may be hard pressed to see the difference in real-world use. Some users will prefer the DS216 because it has a slightly faster processor, supports hot-swappable drives, and doesn't require case disassembly to install new disks. But if you're looking for "bang for the buck", the DS216j is $80 less than the DS216 and offers very similar performance.
As a final note, we've recently seen more volatility in Amazon pricing, which makes shopping by price much more difficult and makes the pricing that appears in our Charts, Rankers and Finders appear to be misleading.
Our Amazon pricing is updated every night directly from Amazon data feeds, taking the lowest price Amazon reports. However, we're seeing more often this "lowest" price isn't really the best deal. It may be from a little third-party seller outside the U.S and not include shipping and import fees.
The bottom line is that if you're interested in a product, click over to Amazon to check the latest pricing.