Print 33 comment(s) - last by EricMartello.. on Dec 5 at 7:57 PM

Seagate performance testing (click to enlarge)
The next best thing to a SSD gets better

Solid State Drives have really come into their own over the past couple of years, as evidenced by the fast growing adoption rate amongst enthusiasts and prosumers. Hard drives have traditionally been the bottleneck in a PC, and fast NAND flash access speeds can make even an obsolete system shine. However, not everyone can afford the pricey cost of SSDs or their capacity limitations. The answer for this is hybrid hard drives.
Hybrid hard drives combine high-density, large capacity platters with NAND flash memory. This allows it to combine the fast access speeds of NAND with the cheap bulk storage of magnetic media while keeping costs under control. However, the secret sauce is in the NAND flash controller and the firmware; if either is not up to par, the entire drive will underperform.
Seagate is one of the few companies in this market, and is releasing today their third generation of hybrid hard drives for the laptop market. The Seagate Momentus XT is a 2.5 inch 750GB hard drive paired with 8GB of Single Level Cell (SLC) NAND flash.
Seagate's first attempt at a hybrid hard drive was the Momentus PSD in 2007. That product was a disastrous flop. It had only 256MB of NAND flash, far too small to be useful. Its 5400RPM platters led to lackluster access times. The NAND controller and firmware were problematic, and costs were high. The resulting low performance kept customers away.
The company tried again last year with the all new Momentus XT. A 4GB SLC cache, new proprietary controller, and rewritten firmware showed off a whole new direction. The NAND was used as a fast cache, with new adaptive algorithms powering the drive to near SSD performance levels. In many ways, this is the strategy used by Fortune 500 companies which have adopted tiered storage solutions. SSDs are used to cache frequently accessed data, while much cheaper hard drives store long-term data.
The second generation Momentus XT doubles the SLC cache to 8GB, while dual platters provide 750GB of storage. This will be the only version of the drive, as capacity trumps cost in this segment. The 500GB Momentus XT accounted for over 90% of sales in the first generation, and will continue to be sold.
A proprietary NAND flash controller has once again been used, but it incorporates evolutionary improvements made by Seagate. This combined with improved "Adaptive Memory" firmware has led to boot speeds comparable to current generation SSDs. There is no TRIM support, but the NAND controller provides a similar function during its garbage collection. The magnetic storage portion itself has a dedicated 32MB DDR2 cache, but we were unable to get details on the NAND controller's RAM. A 6Gbps SATA connection is needed for optimal performance thanks to an improved data burst speed.

The 2.5-inch drive has a height of 9.5mm, which will limit its use in netbooks and tablets. The drive come formatted for the  Advanced Format 4K (4096-byte) sector size, and will require a clean installation for best performance.

The original price was supposed to be set at $189, but was raised in the middle of last week to $199. Now the price has been set at $245 due to extreme demand. Seagate has been shipping in volume for the last week, but the huge demand has caught the company off guard. Normally the company would be able to increase production, but resources are strained due to component shortages caused by the floods in Thailand.

The drive is available today in volume at online retailers Amazon, Canada Computers, CDW, Memory Express, NCIX, Newegg, and TigerDirect. Channel orders have been high, with many e-tailers expecting these drives to be used as performance upgrade alternative to a new laptop due to tough economic times.

Seven OEMs are in the process or have already qualified the Momentus XT. This is a bit surprising considering the conservative nature of OEMs, but DailyTech has been told by Seagate that these OEMs see the drive as a major competitive advantage in their designs for high-end gaming laptops, while keeping costs in control.
Seagate has sold over 1 million hybrid hard drives already, and has plans for a third generation Momentus XT using Multi-Level Cell (MLC) NAND flash. This will allow it to greatly increase the amount of NAND while keeping costs in check.

Comments     Threshold

This article is over a month old, voting and posting comments is disabled

Way too much money
By MrTeal on 11/29/2011 9:28:34 AM , Rating: 2
I understand that many people don't want to deal with more than one drive, but the price on this is just too much. You can go and buy a 60GB Vertex3 at Newegg today for $90 + a $20 MIR, and a 1TB mechanical drive for $140 and have a much faster system.

RE: Way too much money
By Jansen on 11/29/2011 9:35:18 AM , Rating: 2
You have to recognize that these are launch prices for a 2.5" laptop drive. I would love to have seen a lower launch price, but the fact is that Seagate will likely sell out of these for the next three months. You might not need this, but someone out there does and will pay whatever the street price is.

Demand > Supply

RE: Way too much money
By MrTeal on 11/29/2011 10:01:05 AM , Rating: 2
I suppose we'll see what happens in the future. I can see where there might be a market for a drive like this, perhaps for someone who has a laptop as their only computer and wants to be able to store more media without breaking the bank.

Even in that case, this is questionable. I'd like to see some reviews on this; when AT reviewed the Z68 SRT it showed very nice benefits in the best case similarly to what's shown here, but consistency needed work. Those tests were with a 20GB drive, with 8GB consistency would likely be even more problematic unless Seagate's algorithms are much better than Intel's.

I guess the question for users limited to one drive bay would be if the extra 500GB worth the tradeoff over buying a true 240GB SSD for a little more or a 160GB for less? If you absolutely need the space but want better performance and your usage pattern allows you to get maximum benefit out of a hybrid, this might be the perfect drive for you. I'm just not sure how many people fit that profile.

RE: Way too much money
By Church of Dirac on 11/29/2011 10:03:25 AM , Rating: 2
How about a 32GB mSATA SSD for $60 as the boot drive and a 1TB laptop HDD for $109? Would be a lot cheaper and offer more performance and storage plus fit into a standard laptop.

RE: Way too much money
By MrTeal on 11/29/2011 10:12:06 AM , Rating: 2
Only if the laptop offers both an mSATA slot and 2.5" drive bay. It would be great if they started doing this, but I don't think it's very common right now.

RE: Way too much money
By corduroygt on 11/29/2011 10:57:53 AM , Rating: 3
You can replace the DVD on most laptops with a secondary 2.5" bay, unless they don't have an optical drive of course...That's why I bought a laptop with a DVD, so I could replace it with a secondary HDD, since my primary drive is a SSD.

RE: Way too much money
By Jansen on 11/29/2011 10:12:35 AM , Rating: 2
Seagate and the OEMs won't go for it, which means there is no industry support for it.

More components means more complexity, which means inventory, validation, and customer support costs.

The laptop OEMs really want a single drive solution, and this is a good way for them to offer higher performance while still holding to mass market pricing.

Prices will drop, but it will take a while. The demand is just too high, and component supply is too tight.

RE: Way too much money
By Silver2k7 on 12/4/2011 3:23:10 AM , Rating: 2
Ugh a 60GB.. whats that formatted like 50GB or something ??
Would never buy that thing, still waiting for cheap 500GB SSD ;)

RE: Way too much money
By EricMartello on 12/5/2011 7:57:02 PM , Rating: 2
Again with the idiots mentioning newegg as it if it some authority on pricing...and no, these days they don't always have the best prices around. People should get an auto -1 for referring to newegg pricing in their posts.

"The whole principle [of censorship] is wrong. It's like demanding that grown men live on skim milk because the baby can't have steak." -- Robert Heinlein

Most Popular ArticlesSmartphone Screen Protectors – What To Look For
September 21, 2016, 9:33 AM
UN Meeting to Tackle Antimicrobial Resistance
September 21, 2016, 9:52 AM
Walmart may get "Robot Shopping Carts?"
September 17, 2016, 6:01 AM
5 Cases for iPhone 7 and 7 iPhone Plus
September 18, 2016, 10:08 AM
Update: Problem-Free Galaxy Note7s CPSC Approved
September 22, 2016, 5:30 AM

Copyright 2016 DailyTech LLC. - RSS Feed | Advertise | About Us | Ethics | FAQ | Terms, Conditions & Privacy Information | Kristopher Kubicki