Synology DiskStation DS1511+ review
A frighteningly fast desktop NAS appliance with huge expansion potential and storage features to match
Review Date: 4 Apr 2011
Reviewed By: Dave Mitchell
Price when reviewed: £581 (£697 inc VAT)
Features & Design
Value for Money
Not only does Synology’s latest NAS appliance claim impressive performance, but it also looks to have the highest expansion potential we’ve yet seen for a desktop box. The DS1511+ borrows the sleek five-bay chassis of the DS1010+, and doubles the number of eSATA expansion ports to two.
These service Synology’s matching DX510 five-bay expansion units, so if you can afford a round of 3TB SATA drives, this solution can be pushed to a capacity of 45TB. Synology has also been talking up the appliance’s dual Gigabit Ethernet ports and their support for link aggregation.
Placing the ports in a load-balanced link gives a top bandwidth of 2Gbits/sec, but there are some provisos – you need a managed switch that supports link aggregation control protocol (LACP), and your client systems each need two LACP-compliant Gigabit Ethernet ports.
The PC Pro Enterprise lab’s ProCurve 2848 supports LACP, so once the appliances’ ports were teamed together, it dynamically created an LACP link.
Using two Xeon 5500 rack servers running Windows Server 2008 R2 64-bit, we mapped separate shares to them from a quad-drive RAID0 stripe on the appliance, and ran Iometer on each one. We measured cumulative raw read speeds of 205MB/sec and write speeds of 169MB/sec, slightly better than Synology’s quoted speeds.
Moving over to one of the test servers, we ran drag-and-drop copies of a 2.52GB video clip and measured impressive read and write speeds of 99MB/sec and 96MB/sec. Using the same test file with the FileZilla FTP client, we saw speeds increase to 108MB/sec and 103MB/sec respectively.
The DS1511+ offers the storage features that impressed us in the DS1010+, but also introduces Synology’s new DiskStation Manager 3.1. This is an update to the version included in Synology’s RS810RP+, which launched a redesigned web browser interface that can be customised using drag and drop manoeuvres.
It features Disk Groups, which are RAID arrays supporting multiple volumes instead of only one. Synology’s hybrid RAID also lets you create arrays using different sized disks, and now offers dual-drive redundancy for these.
Backup features have been improved, as shared folders can be synchronised between two Synology appliances. We had no problem enabling the Network Backup service using an RS411 as a destination appliance, selecting source and destination folders and leaving them to keep in step in real-time.
Although still in beta testing, the Time Backup feature automates snapshots of one volume to another and allows you to retain different file versions over time. It’s easy to use, and DiskStation Manager’s Disk Groups and multiple volumes make it even more flexible.
The DS1511+ impresses on many levels. It’s one of the fastest NAS appliances currently available, and it looks an ideal network storage choice for small businesses.
Author: Dave Mitchell
Why test with RAID 0?
I wish that PCPro would stop testing NAS units with RAID 0 arrays, after all no one in the real world with any sense would run this configuration. It'd be much better "real world" test if you'd test with more clients and using RAID 5 (or 6).
By nickholway on 4 Apr 2011
Does this use a Linux OS?
Having made the mistake of buying a Cisco NAS device recently for my small business, it should be made clear whether these things run Linux / Samba or Windows Storage.
It's my experience that Linux-based NAS boxes are a waste of time, as they don't behave with Windows Offline Files, which is a fundamental requirement for our business. We've invested £500 on a box which is now little more than a music server because Offline Files just don't work properly.
By RedCitrus on 4 Apr 2011
Great Piece of Kit
I've had one of these for a month or so now and I cannot fault it. Great user interface, loads of useful apps for handling everything from downloads to mp3s to back ups. There really is something for everyone whether your a home power user or business user. Worth every penny.
By Disco181 on 6 Apr 2011
We've been using this unit for a couple of months with 5* 2TB in a RAID 5 array.
Haven't got much to compare against but even for a novice i had it up and running in a matter of hours and once i got my head around the user permissions and setting them before adding data i'm really pleased with the authorisation control on folders.
Loads of other stuff bundled which we're making use of including the security cam and the automated backup etc.
Would happily recommend.
By andychat on 7 Apr 2011
SSDs as cache..
Would make a LOT of sense on such a system.
Double the listed performance for all hot data.
By radicalbyte on 29 Apr 2011
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