Miscellaneous Aspects and Final Words

In order to keep testing consistent across all 8-bay units, we performed all our expansion / rebuild testing as well as power consumption evaluation with the unit configured in RAID-5. The disks used for benchmarking (Western Digital WD4000FYYZ) were also used in this section. The table below presents the average power consumption of the unit as well as time taken for various RAID-related activities.

Synology DS1815+ RAID Expansion and Rebuild / Power Consumption
Activity Duration (HH:MM:SS) Avg. Power (W)
Single Disk Init 0:10:42 32.14 W
JBOD to RAID-1 Migration 11:17:58 42.34 W
RAID-1 (2D) to RAID-5 (3D) Migration 35:53:15 51.68 W
RAID-5 (3D) to RAID-5 (4D) Expansion 25:1:4 62.48 W
RAID-5 (4D) to RAID-5 (5D) Expansion 23:32:53 73.78 W
RAID-5 (5D) to RAID-5 (6D) Expansion 23:6:12 84.07 W
RAID-5 (6D) to RAID-5 (7D) Expansion 24:28:29 94.58 W
RAID-5 (7D) to RAID-5 (8D) Expansion 27:7:26 104.72 W
RAID-5 (8D) Rebuild 14:21:12 103.44 W

The graphs below show the power consumption and rebuild duration when repairing a RAID-5 volume for the various 8-bay NAS units that have been evaluated before.

Power - RAID-5 (8D) Rebuild

Even though the DS1815+ is not as power efficient as the DS1812+, the unit turns out to be better by a huge margin thanks to the cut-down in the rebuild duration. That said, it does look like Synology can optimize RAID rebuild and expansion durations further.

Time - RAID-5 (8D) Rebuild

Concluding Remarks

The SMB / SOHO / prosumer COTS NAS market is interestingly poised. With the previous generation Atom platforms, NAS vendors had to differentiate themselves with the software. However, with their 22nm silicon, Intel has provided them with multiple options. We have already looked at QNAP using Bay Trail-D with extra focus on the multimedia transcoding and virtualization aspects. Asustor has opted to go the Haswell route, with a Core i3 CPU for the 70-series. With the DSx15+ series, Synology has placed its bets on the Intel Rangeley platform.

The new Rangeley platform has made up for the drawbacks of the previous generation x86 platforms at this price point. Equipped with the Atom C2538, the DS1815+ excels in three areas: multi-client performance, encryption capabilities and power efficiency. Synology's DSM is quite mature and it has no problems in bringing out the potential of Intel's Rangeley for the NAS market. The latest version of DSM brings deeper cloud integration (more cloud vendors supported for backup), better sync control, an advanced multi-platform note-taking solution in Note Stations / DS Note and improved security features (such as digital signing for packages). For the SMB market that Synology is targeting with the DS1815+, DSM 5.1 also brings SSD caching to high-availability clusters, VMware VAAI for NFS (in addition to the already existing iSCSI support) and scheduled iSCSI LUN snapshots.

Multi-client performance in terms of average response times is better because of the highly integrated I/O compared to other solutions which use bridge chips and have bottlenecks in connecting to the CPU. The appearance of AES-NI in the Atom-class SoCs has finally delivered power efficient encryption capabilities. Obviously, the 22 nm fabrication process as well as tight I/O integration greatly help in reducing the power consumption of the platform compared to other solutions in the market.

The above advantages aside, there are certain areas where Synology could improve:

  • The DS1815+ needs to ship with 4 GB of RAM by default. Users running multiple apps would benefit tremendously.
  • Even though the iSCSI feature set is quite advanced and ahead of the competitors, performance for the 'multiple LUNs on RAID' case could do with some improvement
  • In terms of hardware / chassis design, a USB port (even 2.0 would suffice) on the front would be nice to have.

At $1050 for a diskless unit, the pricing is not unreasonable (given the premiums usually associated with Synology units). The Atom C2538 is one of the more powerful Rangeley SoCs and it helps the DS1815+ pack quite a punch for the SMB / SOHO market. We will shortly be reviewing a couple of 8-bay NAS units from other vendors. They will help us get a better understanding of where the DS1815+ stands when contemporary NAS units are taken into consideration.

Encryption Support Evaluation
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  • LoneWolf15 - Tuesday, November 18, 2014 - link

    The thing is, no business is going to base a NAS on hardware that's "going to goodwill anyhow" unless they're run on a shoestring budget or one that doesn't comprehend data integrity. $750 is worth the time because it gives you the following with Synology:

    -Easy setup
    -Easy replication to a second Synology
    -Easy migration from a failing NAS
    -Easy reporting/monitoring for small to medium business
    -Easy administration for a business that doesn't have your level of IT knowledge

    This product isn't for you, but actually, the Synology DSM operating system *is* a proven OS; it's at version 5.1 now. The argument for purchasing one is the same as the argument for buying a server over building your own --in business, there's good reason for letting someone else do that part of the work for you, so you can concentrate on, you know, --business.
  • carage - Wednesday, November 19, 2014 - link

    It will work great until it get hits with SynoLocker again.
  • SirGCal - Wednesday, November 19, 2014 - link

    I don't know any business that would use these as secure NAS storage anyhow. Businesses have an entirely different type of storage, far faster, more secure, and actually quite larger. The last bank we bought is a simple rack configured for 24 drives in volumes of 12 that you can use any way you choose. These are for consumers, not businesses.
  • SirGCal - Wednesday, November 19, 2014 - link

    And for the record, I don't work with hardware, I write software by trade. Although my direct trade has nothing to do with helping me learn to set these up. That knowledge came from a few minutes on Google and I can follow instructions. I've also fixed a failed array, moved them to new hardware, etc. ZFS is actually one of the oldest and most secure RAID type format, originally created for Solaris/Sun systems very long ago. The nice thing about modern ZSF arrays is how easy they are to recover, unlike hardware-raid options which even putting the drives in an identical controller might not work.

    And all of your bullets are easily covered by the combination accept the last which, honestly, if your level of IT is that low in any company, you should be out-sourcing all of your storage and IT needs and not even trying to do this alone. But it would be almost questionable why any company that small would need live, fast storage like this. New cloud services are generally far more their cup-of-tea for the very small businesses. Literally buy it and forget it, use it like a drive within your company, fully encrypted, etc. and surprisingly quick considering. Even my extremely large company has a few online storage systems for the 'very cheap' departments to use instead of spending a bit more for a rack in the data center and tape backups there-after. The cloud is far cheaper if you're not talking hundreds of Tera-bytes and extreme speed access. That's from the business side of the discussion. But again, these are aimed at consumers.
  • DiHydro - Wednesday, November 19, 2014 - link

    "Businesses have an entirely different type of storage, far faster, more secure, and actually quite larger." You mean this same hardware in a rack mount? Did you even read this article? Any business employing 1-50 or so people would be the target for this NAS. Something like a hairdresser, contractor, accounting firm (hopefully with offsite backup also). You are too entrenched in your view point to see that others have different priorities and objectives. Yes, for people like you and I, setting up an 8 bay NAS with generic components is trivial, but the manager at your grocery store doesn't know, and doesn't care. They will buy something that is plug-and-play, has a warranty, and has the storage they need. Imagine if that manager hired you to set up a storage solution, would you custom build the hardware and install Ubuntu for it? No, you would quote out one of these, and a couple hours of install. Making you a nice profit, and not having the buyer have deal with you and the cobbled together solution for any little problem in hardware compatibility, or down time, or interoperability issues.
  • SirGCal - Friday, November 21, 2014 - link

    The manager at the grocery store isn't responsible for buying hardware and would have no need for said hardware. Nore would a hairdresser... And even if they did need storage, online storage would be more cost beneficial in most of those cases. But what are they going to store? The grocery store has a giant IT system tied into the parent company with their proprietary software. The Hairdresser has contact information, assuming they have their own store and not working for a chain... My parents both work at a grocery while they retire. And unfortunately, mom & pop groceries are all but gone due to the push of the horrible corporate arm. And I help my wife's hairdresser who does my hair for Locks for Love when I grew it out (a free everything when I donated). The most she ever needs is her laptop cleaned of malware. All of her contact information is safely and securely stored in the 'cloud' (god I hate that word... it's on servers on the internet... but let's tag it with a stupid word now that speeds are high enough we can push to outside storage easier...) Nice try though. Ironic on both counts, but no dice.
  • verraneventide - Tuesday, October 27, 2015 - link

    SirGCal: yes, I am resurrecting this comment chain almost a year later. I rarely post on the 'net to comments like these: so lucky you. We just deployed this NAS for my client. My client is a small retail business (20+ employees) who sell medical scrubs and equipment. They own three retail stores, run two large e-commerce sites and handle a lot of phone orders. We setup the NAS to retain local disk images of all their machines. We also use it for VM hosting and additional file sharing needs. They use me as a part time contractor because they have a very tight budget and cannot afford a full time (competent) IT resource. They would much rather purchase a device, with manufacturer support, like this, than have me spend labor hours building something out that I may not be around to support later (i.e. if I get hit by a bus). We also backup everything to the cloud as a redundant fail-safe. This *includes* everything on the NAS. Sure, I could have set up my own solution. But, as a previous commenter mentioned: finding and purchasing the necessary hardware, setting it up, testing it and deploying it would have been more time consuming, and therefore more expensive. I am calling bull**** on going through that entire process in only 30 minutes. And, again, a custom solution would have been without manufacturer support. So, "no dice".
  • awktane - Tuesday, November 18, 2014 - link

    Configure a NAS unit like this beside someone who is trying to create a HA iscsi server with plex, picture sharing website, and cloud synch replacing onedrive/dropbox/etc with little prior knowledge. Then do watch them both when something goes wrong. Time is money.
  • Gigaplex - Tuesday, November 18, 2014 - link

    If I rebuilt my home file server from scratch, it would probably take me less than an hour to get it up and running. When I did it originally, I spent days experimenting which filesystem to use, tuning cache and stripe size on the array for performance, diagnose samba configuration issues etc. As a hobby, that's fine. If I had to charge for my time, it would have been cheaper to just buy a preconfigured NAS.
  • dgingeri - Tuesday, November 18, 2014 - link

    If their time is worth that much, they should hire a real IT guy to do it right.

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