The DS1821+ provides 8 drive bays with the option to expand to 18 using two DX517 expansion units 4. Powered by Synology DiskStation Manager (DSM), in addition to JBOD/RAID0/1/5/6/10, Synology Hybrid Raid (SHR) allows users to create arrays using odd-sized drives while still maximizing the storage potential of the array. This enables older drives to be serviceable, without requiring an upfront commitment to only installing drives of the same capacity.DSM also provides easy means of upgrading storage capacity after the device has been set up. Add in a new drive and expand your array effortlessly, without disruptions to services or requiring lengthy manual processes 5. RAID options can similarly be upgraded, from a lower-protection level to a higher one, such as from SHR-1, one drive redundancy, to SHR-2, two drive redundancy 6. Our first throughput test measures 4K random performance when inside the Synology DS1821+. Here, the WD Gold 22TB posted 328 IOPS in reads and 1,477 IOPS write (SMB) and 5,204 IOPS read and 1,513 IOPS write (iSCSI). Powered by an AMD Ryzen CPU, the Synology DS1821+ is an easy-to-use 8-bay NAS aimed more at SMBs that require a bit more performance and capacity. It features two M.2 slots for NVMe SSD cache as well as 10GbE connectivity (though this must be added via one of its PCIe expansions slots). Overall, the Synology DiskStation DS1821+ is a strong performer for an SMB NAS.

In 4K average latency (where lower is better), the Synology DS1821+ posted 165.11ms write and 429.74ms read in SMB, and 162.92ms write with a much lower 61.63ms read in iSCSI (HDD configuration). Using SSDs, the latency fell to 6.62ms and 9.77ms write/read in SMB and 6.85ms and 2.56ms write/read in iSCSI. In the first of our enterprise workloads, we measured a long sample of random 4K performance with 100% write and 100% read activity. Looking at IOPS, the Synology DiskStation DS1821+ HDD configuration recorded 1,550 IOPS write and 595 IOPS read in SMB, while hitting 1,575 IOPS write and 4,153 IOPS read in iSCSI. With SSDs, it showed, expectedly, significant gains (as is the case in the rest of the performance review) with 38,633 IOPS write and 26,209 IOPS read in SMB and 37,339 IOPS write, and 99,988 IOPS read in iSCSI.

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In our SSD configuration, we saw better performance, to no surprise. In 4K read the DS1821+ saw 38,633 IOPS write and 26,209 IOPS read in SMB and 37,339 IOPS write and 99,988 IOPS read in iSCSI. Looking at 4K average latency, the NAS saw 6.62ms write and 9.77ms read in SMB and 6.85ms write and 2.56ms read in iSCSI. With our 8K sequential test, the SSDs in the NAS hit 53,992 IOPS write and 56,436 IOPS read in SMB and 56,181 IOPS write, and 57,101 IOPS read in iSCSI. In 128K sequential, the NAS hit 458MB/s write and 463.1MB/s read in SMB and 457.6MB/s read and 462.9MB/s write in iSCSI. Data scrubbing inspects your volumes and modifies detected inconsistencies. In simple terms, this protects your NAS against bit-rot. There isn’t a specific schedule that’s mandatory, but it’s a good idea to run it at a minimum, bi-annually. You shouldn’t open ports to applications you aren’t actively using. For example, you might have SSH enabled, but it’s a good idea to turn off SSH when you’re done and to remove the “allow” firewall rule.

No matter the use case, however, the massive WD Gold 22TB drives will give organizations a lot of flexibility on how they manage their data with tons of opportunities for scalability.The 5-bay DX517 expansion unit uses an eSATA connection, which caps at 5Gbps, to connect to the server. Memory Upgrade Modules (Ranging from 4GB to 16GB and 32GB Individual Modules – Link below for Tested RAM modules from Crucial, Kingston, Samsung, Timtec and Synology Official Memory too: This might not seem important on the surface, but understanding how your storage is being used is integral! 2.5 Uninterruptible Power Supply (UPS) After that, you can install them via the slot on the server's underside. The process is easy and painless. All you need is a small Philip-head screwdriver. Synology DS1821+: SSD caching upgrade

Usable capacity for each volume will be lower than the maximum volume size and is dependent on the filesystem and the amount of system metadata stored. As such, we populated the Synology DS1821+ (a strong performing 8-bay SMB NAS) with eight WD Gold 22TB drives and put it through our usual gauntlet of tests. Overall, we saw great throughput results across all of our benchmarking, especially when configured with the iSCSI protocol. It’s important to know that although there are many different kinds of Synology NAS, this guide is for the DS1821+ NAS. Although many of the Diskstation range are similar, there are many differences in Memory module frequency, size and capacity support between the hardware architecture of devices, so make sure you are only following this guide if you want to upgrade the memory unofficially on a Synology DS1821+ NAS drive. When the drive is unmounted, no one can access the files until you mount the folder again. If you lose the encryption key, your files will be lost forever. Keep it somewhere safe!

What's most notable, though, is that it's basically the DS1621+ plus two drive bays. The two share the same hardware specs -- both are the firsts from Synology that use an AMD Ryzen quad-core CPU.

A wizard will then start to assist you in the creation of the scheduled task. Give your report a name, set a schedule, and then specify the total number of reports you’d like to keep.For our testing, we configured the Synology DiskStation DS1821+ in RAID6 in both iSCSI and SMB using both an HDD and SSD configuration using the following drives: As we indicated above, we previously review the WD Gold 22TB inside the Supermicro server; however, for these sets of benchmarks, we installed eight of them into our Synology DiskStation DS1821+ configured in RAID6. We will be testing in both iSCSI and SMB protocols.