Western Digital Red Review: Are NAS-optimized HDDs Worth the Premium?
by Ganesh T S on August 17, 2012 4:20 PM EST- Posted in
- Storage
- NAS
- Western Digital
Performance Metrics and Power Consumption
The performance evaluation reports are organized under two categories: Standalone and NAS-based. In the latter case, we have two NAS systems which are not in the officially sanctioned list (LaCie 2big NAS and Netgear NV+ v2) and one recommended by WD as definitely compatible (Synology DS211+). As mentioned earlier, we present the equivalent performance numbers for the 3 TB Seagate Barracuda 7200 rpm drives. We make use of the standard single-client NAS testing methodology using NASPT / robocopy.
First, let us take a look at the HD Tune Pro benchmarks on the standalone drive.
The sequential access speeds vary between 59 MBps and 148 MBps depending on whether the outer or inner parts of the platter are being accessed. 4KB random accesses aren't going to win any performance benchmarks (the numbers reported by HD Tune Pro above aren't directly comparable with what we have reported using IOMeter in other HDD reviews).
The following graphs summarize the results from our NAS testing. In all configurations, the drives were put in RAID-1.
In order to put the final two graphs in perspective, we note that the standalone WD Red (freshly formatted) connected to a SATA 6 Gbps port of the Asus P8H77-M Pro delivered 130.07 MBps in the write test and 137.46 MBps in the read test. In the NAS systems, the WD Red performs quite well, particularly in the Synology DS211+. It does lose out to the Seagate 3TB hard drives under some circumstances. However, one can safely say that in 2 - 5 bay NAS systems based on ARM chipsets, it is unlikely that 7200 rpm drives are going to consistently deliver better performance than the 5400 rpm / IntelliPower drives.
In order to get an idea of how much power savings one can expect from using these drives, we took the LaCie 2big NAS and ran the disk performance bench using both the Seagate and WD drives in RAID-1 configuration. The following table summarizes the power consumption under various operating modes.
| LaCie 2big NAS Power Consumption | ||
| Mode | Seagate 3 TB | WD Red 3 TB |
| Sleep | 7.7 W | 7.7 W |
| 100% Read | 20.6 W | 14.8 W |
| 60% Rand, 65% Read | 21.2 W | 15.9 W |
| 50% Read | 20.9 W | 14.9 W |
| Rand 8K 70% Read | 20.6 W | 14.7 W |
It is interesting to see that the WD Reds consume just slightly more than two-thirds the power of the 7200 rpm drives when subject to similar accesses over the network. Of course, one might say that 7200 rpm drives such as the Seagate one we used above are not suitable for NAS applications at all. However, note that LaCie had in fact bundled them with their 2big NAS with the OS pre-installed.
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Dzban - Saturday, August 18, 2012 - link
1. Any good recent 7200 RPM drive2.same
3.same but you could use "green" type drive if you would store
not frequentlyu used files like media
vgray35@hotmail.com - Saturday, August 18, 2012 - link
The term "not frequently used drive" reveals nothing about usage. A single usage event could last for 30 minutes. Doing this once a day qualifies as not frequently used. However during that single event power dissipation could cause temperature to rise very high, and this extreme thermal cycling dramatically reduces hard drive life cycle. The low power drive causes peak temperature to be high due to inadequate cooling due to the drive's physical construction in part. So what does "low power and not so frequently used drive" really mean. Typically it means low quality, low reliability and dubious low power capability.Just focus on good quality drives from the start in all situations and spend the money to make life more simple. GREEN OR BLUE drives are just not worthwhile for any application. Open one up and take a look. BLACK is better so use it everywhere. RED appears to be better yet, so maybe we should use that one in every situation instead.
ECO drives are not worthwhile.
probedb - Monday, August 20, 2012 - link
Odd, I had a Blue running as the OS drive in a server for 2-3 years without failure before I replaced with with an SSD.Open one up? What would that tell us exactly?
vgray35@hotmail.com - Monday, August 20, 2012 - link
Yip it happens - depends on temps and temp cycling. Proves nothing, except that you likely did not drive them particular hard. One guy got 3y with a GREEN in a server.I ran two Blues in a laptop and these only lasted approximately a year each. All depends on what these drives are being subject to on the one hand, and how well they can take on the other hand.
I monitor drive temps all the time - like watching the fuel gauge on my car - and I know at all times how hard they are being driven. I make sure they always have the best possible environment to operate in because they will be driven hard. I have far less trouble with BLACK drives.
vgray35@hotmail.com - Monday, September 3, 2012 - link
A Blue drive for an OS drive in a server with low temp cycling will last that long. The thermal environment is what makes it last. The drive is not however designed for temp exceeding 45C with extremes of thermal cycling.Good drives consider elements such as: Stiffness of components; thickness of magnetic coating on the discs; cooling design, electronic design, firmware. To the trained eye you will see a big difference in design between say a BLUE drive and a BLACK drive.
_niko_ - Monday, August 20, 2012 - link
According to WD since i mailed them asking a few questions regarding this straight after the pressrelease.Thank you for contacting Western Digital Customer Service and Support. My name is Michael.
The WD Red drive is designed to fit into a particular niche in the market. These drives were designed to be compatible with RAID enclosures of 2-4 bays. The list of tested and supported RAID enclosures are included below.
1. Synology, QNAP, D-Link, Drobo, Netgear, and Thecus.
2. It would be best to contact these enclosure makers for a list of specific models campatible with WD Red drives.
The WD Red drive is built on Green technology, this is not a RE or Enterprise class drive. There is no TLER (Time Limited Error Recovery) enabled on this family of drive. TLER is used only in our RE or Enterprise class drives. These drives are not designed to be used in Enterprise environments.
The drive has four means of error recovery:
1. ECC On-the-Fly
2. Preamp Thermal Asperity (TA) Compensation
3. Read/Write Retry Procedure
4. Extended Read Retry Procedure
The heads do park after 8 seconds using our No Touch Ramp Load Technology.
Parks the recording heads off the disk surface during spin up, spin down and when the drive is off.
This ensures the recording head never touches the disk surface resulting in improved long term
reliability due to less head wear, and improved non-operational shock tolerance.
If you have any further questions, please reply to this email and we will be happy to assist you further.
Sincerely,
Michael
Western Digital Service and Support
http://support.wdc.com
vgray35@hotmail.com - Tuesday, August 21, 2012 - link
And what did you learn from that WD response? Not a whole lot. A RED drive is certified for 1,000,000 load cycles, while GREEN, BLUE, BLACK are significantly less, so how could they possibly be based on the same so called GREEN technology. Pure marketing hype nothing more is what WD sprouted forth.
Ipso facto the RED drive cannot be built on GREEN technology. It just sounds nice. 1,000,000 load cycles is a lot different from what the GREEN drive is capable of, and it certainly has much more to do with hardware technology than just plain firmware tweaks.
The Enterprise RE4 and XE drives are rated at only 60% of the load/unload cycles of the RED drive (600,000 as compared with 1,000,000). RED is not GREEN technology - sorry WD - at least not in terms of what's in the GREEN drive per se, and as much as WD would like us to believe RED is not suited to ENTERPRISE loads, they are simply just lying. Warranties differ 3y as against 5y between RED and Enterprise, and what enterprise drives are paying for is the higher warranty and commitment WD offers (plus slightly better hardware).
I suspect RED would do just fine in an enterprise environment, just need to change them out more often in line with the 3y warranty, and you would still be saving money. I bet that 5y warranty on BLACK is going to be phased out pronto.
These companies think we are stupid, and in reality these drives jockeying for different markets is sprinkled with a lot of marketing effluvia. I would rather listen to the engineers but they are not allowed to speak.
Comparing RED to Enterprise RE4 specs I would take the RED anytime despite the lower 3y warranty, where the latter offers 66% more load/unload cycles, draws much less power, and offers 70C operating temps rather than 55C. Imagine lower power and 15C higher operating temp limit. Looks like a good Enterprise drive to me. What WD really meant by RED drives not being designed for enterprise environment is really this: "You have not payed the premium for 5y warranty therefore we will not support it in that application". Who cares, we intend to forcibly replace them before the warranty is up anyway.
I like these RED drives from what I can see at first blush, and I fully intend to use them in Enterprise environments without asking for WD permission. I am a programmer, so my NAS drive is always operating in an Enterprise environment loading scenario. My servers will be upgraded to RED.
I hope they make 2.5" RED drives so I can replace my BLACK drive with a RED drive in my laptop.
Affectionate-Bed-980 - Monday, August 20, 2012 - link
Comparing a RED drive against any other drive is pointless unless its the WD Green. What you're trying to establish is whether a new "NAS" specific drive has any benefits.The Green drive already represents a 5400 rpm storage drive that's popular in NAS applications. YOu could compare against other drives such as the Seagate or Hitachi or Samsung green drives, but differences could be attributed to how good the drive is to begin with. A WD Green drive is the correct benchmark.
What the hell did I learn when you benched against a 7200rpm Seagate Barracuda? NOTHING. You could've benched a WD Green against a 7200rpm Seagate or Samsung 2TB against a 7200 rpm drive.
I realize HD reviews aren't AT's specialty, but if you read StorageReview's WD Red review, at least it makes sense. You need to be making logical comparisons.
I'm sure people look for BMW 335 reviews are also comparing it heads up against a Prius. Ugh.
Affectionate-Bed-980 - Monday, August 20, 2012 - link
better yet you could've compared Red vs Green vs Blue vs Black.andersenep - Tuesday, August 21, 2012 - link
I've been using the WD green drives in my file server for over 4 years now. Initially, I did not know to disable the intellipark feature with the wdidle utility, and racked up some ridiculous load cycle counts (about 150k) on my first four 1TB drives. Despite this, the drives lasted over 2 years before I replaced them with 2TB drives for more space; not because the drives had problems. I still use those same drives in a RAID 10 two more years later on my desktop.I really don't see any reason to spend $50-80 more a drive for a "feature" I can enable/disable myself. I've read so much negative stuff on using WD green drives in RAID/NAS, but I haven't had any issues personally.
Seriously, $50 (2TB) to $80 (3TB) more per drive for what?? No thanks. I'll take the cheapest, low power drives and regular backups any day. Hasn't done me wrong yet. I also have a bunch of Samsung green drives that have performed just as admirably as the WDs for even cheaper (on sale).