Enhance Technology UltraStor RS16 IP-4 review
No dual controllers, but it’s good value, has expansion potential and delivers top performance under load
Review Date: 1 Feb 2012
Reviewed By: Dave Mitchell
Price when reviewed: 16TB, £5,280 (£6,336 inc VAT)
Features & Design
Value for Money
Enhance Technology specialises in affordable IP SAN solutions for SMBs, and its latest, the UltraStor RS16 IP-4, makes bold performance claims. We were supplied with a diskless appliance, but the price above is for the device with 16 1TB Enterprise SATA II drives installed; a full house of 2TB drives will set you back £7,274.
However much storage you go for, the appliance has four independent iSCSI Gigabit data ports, and redundancy comes in the shape of a pair of 460W hotplug supplies and hotplug fan modules. For expansion, the controller’s SAS port supports up to four RS16 JS 16-bay disk shelves and up to 80 drives.
Dual controllers aren’t supported, and the single SAS expansion port means redundant links can’t be created across expansion arrays. The controller is also lacking a battery backup pack, so we recommend using a UPS.
RAID options include stripes, mirrors, RAID5 and dual-redundant RAID6. The latter two can be striped in RAID50 and 60 configurations, and then there’s N-way mirroring, where instead of two drives, the array can contain multiple mirrors for N-1 failover.
Installation is swift. The tidy web interface’s quick-start option can suggest an optimal RAID array based on the drives installed. For testing, we used four 1TB WD SATA drives, took manual control and created a RAID5 array.
Up to eight arrays are supported, and each one is called a volume group (VG). Within these you create user data volumes (UDVs) that are your iSCSI virtual drives, and each VG can contain multiple UDVs of varying capacities.
For access control, each UDV can be assigned to specific iSCSI host initiators, or a wildcard entry makes them available to all hosts, and you can specify read or read/write access. The controller advertises a single iSCSI node name with all accessible virtual volumes appearing below this as LUNs. This isn’t a major issue, but as CHAP authentication is applied at the node level this will apply to all hosts and LUNs.
Snapshots of UDVs can be run manually, or at scheduled intervals, and used for rollback purposes. They can also be presented as new read-only targets, although make sure they’re attached to specific hosts only; we found using wildcard access can cause them to appear as uninitialised drives.
You can migrate VGs to different RAID array types, and expand their capacity into extra physical drives. UDVs can also be expanded into spare space within their parent VG simply by clicking on a button in their size column and entering a new capacity.
For performance testing, we created four UDVs and assigned each one to a different test server. These were all running Windows Server 2008 R2 and were also logged into a dedicated portal IP address on the appliance.
With one server running Iometer, we saw read and write speeds of 112MB/sec and 110MB/sec. With a second server, overall throughput rose to 223MB/sec and 220MB/sec. With all four servers in the mix we recorded cumulative raw read and write throughputs of 446MB/sec and 421MB/sec, showing no contention for resources.
The Enhance Technology UltraStor RS16 IP-4 delivers top IP SAN speeds under load and looks good value. SMBs that don’t want the added expense of dual RAID controllers should definitely take a closer look.
Author: Dave Mitchell
- Toshiba beats retreat from consumer PC market
- Ellison steps down: but who's really running Oracle now?
- Microsoft set to make more job cuts
- Is Peter Pan panto tickets email genuine? Oh no, it isn't
- Intel triples Xeon E5 chip performance, adds DDR4
- Patch Tuesday targets critical IE flaw
- Microsoft refuses to hand over customer emails
- Microsoft yanks Windows 8.1 update after crash reports
- Microsoft backtracks on blocking out-of-date Java
- Gartner: time to start planning your Windows 7 upgrade
- How to check your identity hasn’t been sold to the hackers
- Tim Cook: this is how much TV has changed since the 70s
- Westminster wins the .London battle
- 20 years of PC Pro: from deep pan pizza to virtualisation
- Five reasons why the Apple Watch leaves me cold
- Apple Watch, iPhone 6 and 6 Plus: Tim Cook's Apple back with a bang?
- BT Home Hub 5: how to get maximum speed
- 20 years of PC Pro: one-star reviews (including "the worst tablet we've ever seen")
- 20 years of PC Pro: our best covers
- Why we've closed the PC Pro forums
- How to set up a wireless hotspot for your business: give customers free or paid for internet access
- Five worst SMB security threats... and how to solve them
- Doing business in a social era
- How to configure SysLookup for your network
- The 18 best Outlook tips for increasing productivity: become an Outlook expert with these lesser-known tips
- Office: should you buy it, rent it - or dump it?
- Small server vs cloud: which is best for SMBs?
- The best mobile apps for business
- Windows XP: Microsoft’s ticking time bomb
- gTLDs: what your business should know about new domain names
- How to sell more ebooks on Amazon
- 10 ways to make your business more secure
- Top five VoIP mistakes
- How to add in-app purchasing to an iPhone, Android or Windows app
- Remote-control ransomware: TeamViewer and software hardball
- Why laptops with serial ports matter to the Internet of Things
- Make your mobile battery last longer
- Small steps into handling Big Data
- Nexus 5: does it really run stock Android?
- How to get broadband to a garden office