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Seagate Momentus XT 320 GB 7200RPM SATA 3Gb/s 32 MB Cache 2.5 Inch Solid State Hybrid Drive ST93205620AS-Bare Drive

by Seagate
| 14 answered questions

List Price: $125.90
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320 GB
  • Solid state hybrid drive delivers SSD-like performance with hard drive capacity options
  • Adaptive Memory technology customizes performance by aligning to user needs for overall improved system response
  • 80 percent faster performance than traditional 7200-RPM drives in PCMark Vantage benchmark scores
  • Low heat and vibration - quiet operation without giving up storage capacity and affordability
  • OS- and application-independent - designed for any SATA standard laptop PC
3 new from $94.99 2 refurbished from $75.00

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Seagate Momentus XT 320 GB 7200RPM SATA 3Gb/s 32 MB Cache 2.5 Inch Solid State Hybrid Drive ST93205620AS-Bare Drive + SquareTrade 2-Year PC Peripherals Protection Plan ($75-$100)
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Technical Details

Capacity: 320 GB
  • Brand Name: Seagate
  • Model: ST93205620AS
  • Hard Disk Size: 320.00 GB
  • Warranty: 5 Year
  • Weight: 0.45 pounds

Product Details

Capacity: 320 GB
  • Product Dimensions: 2.8 x 4 x 0.4 inches ; 3.8 ounces
  • Shipping Weight: 4 ounces (View shipping rates and policies)
  • Shipping: Currently, item can be shipped only within the U.S.
  • ASIN: B003NSBF3C
  • Item model number: ST93205620AS
  • Average Customer Review: 4.1 out of 5 stars  See all reviews (702 customer reviews)
  • Date first available at Amazon.com: May 24, 2010

Product Description

Capacity: 320 GB

From the Manufacturer

The Seagate® Momentus® XT drive enables laptop PC users to enjoy solid state-like performance without sacrificing storage capacity and affordability. The Momentus XT solid state hybrid drive utilizes Adaptive Memory™ technology to dynamically optimize performance by aligning to user needs. This perfect balance of SSD and HDD delivers low heat, noise and vibration, and is available in capacities up to 500GB.

Seagate® Momentus® XT
Momentus Drive XT
Powerful, Intelligent, Affordable—Solid State Hybrid Drive
Up to 50% faster boot-up over 5400-RPM drives
Isn't it time for a hard drive that combines SSD-like performance with affordable high-capacity storage?
 
The Seagate Momentus XT solid state hybrid drive is finally here—in capacities up to 500GB, designed specifically for:
  • High-end laptops and mobile workstations
  • High-performance gamer laptops
  • Fast external enclosures: USB 3.0, eSATA
  • Small form factor PCs
Why choose the Momentus XT drive?
  • Solid state hybrid drive delivers SSD-like performance with hard drive capacity
  • Adaptive Memory™ technology boosts performance by aligning to user needs
  • 80 percent faster performance than traditional 7200-RPM drives in PCMark Vantage benchmark scores
  • Quiet operation without giving up storage capacity and affordability
  • Designed for any SATA standard laptop PC
  • Seagate 5-Year Limited Warranty
Endorsements/Reviews

 
STX Hybrid = Performance AND Price
Performance
HDD = 7200rpm, 250GB 2.5 Momentus
Performance increment over a 2GB RAM 5400rpm drive
Momentus XT Benchmark Results
Benchmark

 
The performance that you get for your money is outstanding
 
 
Club Overclocker Rating CLUB OVERCLOCKER RATING FINAL RATING SKILL LEVEL
Performance:
Innovation:
Quality:
Stability:
Aesthetics:
Software/Drivers Pack:
Overclocking:
Value:
5 out of 5
5 out of 5
5 out of 5
5 out of 5
5 out of 5
N/A
N/A
5 out of 5
Project Skill Level:
(5 being most difficult)
3 out of 5
 
 

 
Seagate® Momentus® Family Hard Drives

GoFlex Desk Hard Drive
Seagate® Momentus®
5400 & 7200 RPM drives
with capacities up to 750GB
click here
GoFlex Desk Hard Drive
Seagate® Momentus® XT
Solid State Hybrid drives
with Adaptive Memory Technology

 
Seagate Momentus XT Specifications
Specifications
  • Capacity 500GB1, 320GB1, 250GB1
  • Model Number: ST95005620AS (500GB), ST93205620AS (320GB), ST92505610AS (250GB)
  • Solid State Memory, SLC NAND (GB): 4
  • Interface: SATA 3Gb/s NCQ
Performance
  • Cache (MB): 32
  • Spindle Speed (RPM): 7200
Configuration/Organization
  • Bytes per Sector: 512
Reliability/Data Integrity
  • Head-Rest Method: Head-Rest Method
  • Load/Unload Cycles: >600K
  • Nonrecoverable Read Errors per Bits Read, Max: 1 per 10E14
  • Limited Warranty (years): 5
Power Management
  • Seek, Typical (W): 1.554
  • Idle, Typical (W): 0.8
Environmental
Temperature (°C)
  Operating 0 to 60
  Nonoperating -40 to 70
Shock (Gs)
  Operating: 2 ms 350
  Nonoperating: 1 ms 1000
Acoustics (bels - sound power)
  Idle, Typical 2.3
  Seek, Typical 2.5
Physical
  • Height (in/mm): 0.370/9.5
  • Width (in/mm): 2.75/69.85
  • Depth (in/mm): 3.951/100.35
  • Weight (lb/kg): 0.238/110
1 One gigabyte, or GB, equals one billion bytes and one terabyte, or TB, equals one trillion bytes when referring to hard drive capacity.

Product Description

The Seagate Momentus XT drive offers hybrid storage with Adaptive Memory technology, enabling the drive to deliver higher capacities up to 500 GB and SSD-like performance. The Momentus XT drive is designed for all standard laptop PCs and is OS-, driver- and software independent, making this drive easy to integrate and easy to use. Adaptive Memory technology enables the drive to tailor its performance to the user. Whether you are gaming, editing digital media or crunching numbers, the performance is optimized and ready for your next move. Adaptive Memory technology is a Seagate data management technique that constantly monitors and quickly recalls data usage and preferences. It places files and data that the user will likely access again and again into the solid state portion of the drive. When the user requires the data or application file, it already sits in an instantly accessible location, thereby customizing system performance for the user. Constant monitoring dynamically improves overall response time based on personal usage. You can perform at your best no matter how you use your laptop PC.

Customer Questions & Answers

Customer Reviews

Really, it works very great for my desktop!
quanjiangzhang
With this drive you get about 80% of SSD [pure solid state] performance, plus the advantage of a huge storage size.
Bryce Edwin
You will notice your system boots much faster.
Steve S.

Most Helpful Customer Reviews

743 of 753 people found the following review helpful By Steve S. on August 9, 2010
Size Name: 250 GB
I have the 500GB version of this drive. I also use and have used SSD's with SLC and MLC flash, JMicron controllers, Samsung Controllers, Barefoot controllers, and SandForce controllers on 32-bit and 64-bit operating systems. I've used several generations of Raptors, and 3Ware RAID controllers. I'm not saying that to brag, I'm saying it to point out I have a reasonable basis for comparison and expectation.

Here's what the drive does well: It's alignment- and OS-agnostic, so it does not care if you run it unaligned on older XP systems. It will, over about 5 cycles, learn what you do and optimize it. You will notice your system boots much faster. It excels on systems where you boot into your OS and do the same basic tasks, say, open MS office and Firefox and Outlook.

Here's what the drive does not do well: If you are constantly changing what you run on your computer, your drive will constantly be "learning" what you do. I have also found it does not do well with remote desktop apps that are constantly caching image data.

Here's what the drive does that makes it no better or worse than any other mechanical drive: If you are using the drive to store music or videos or such, they are going to go the the platters. Then it's just another very good, high performance 7200RPM notebook drive. Nothing wrong with that at all.

Here's the KILLER APP reason to buy this drive: I took a 32-bit Vista Home Premium laptop that was so congested and clogged with programs, leftovers of removed programs, fragmentation, you name it, and just cloned it to this drive. The mechanical drive it was on took literally 5 minutes to get to a useful state on the desktop. This drive, after about 5 boots, learned that our family needed Vista OS, Chrome for Farmville, and iTunes.
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365 of 381 people found the following review helpful By J. Cullen on August 19, 2010
Size Name: 500 GB
I replaced my 500GB 5400rpm WD with this Momentus XT after doing exhausting research. I use my MacBoook Pro laptop for analytical work involving large datsets. Here is why I settled on the Momentus XT vs an SSD.

Momentus XT
- 4GB SLC SSD integrated into the hard drive for speedy access commonly used files
- Although not as fast as an SSD, but soooo much cheaper than 300GB+ of SSD space.
- More vibration and a little more noise than my WD 500GB, but not significantly so.
- Mac OS X doesn't support TRIM. I was concerned that a SSD drive would slow down significantly overtime without it.
- Toms Hardware highly recommended it over other 7200 rpm laptop hard drives. See their review for all the techy details.

Note that the integrated SSD is used only for reading, not for writing. It essentially clones your commonly used files on the 4GB SSD.

If you are looking for a sweet spot between speed and space this is it. The Momentus has a 4GB SLC SSD integrated into the hard drive which allows for very fast reads of commonly used data. This translates into really fast application loading like an SSD. It uses a learning algorithm to decide what to store on the SSD so it takes some time to get to optimal performance.

Most people have a lot of data that is accessed infrequently on their hard drive. Thus an SSD is overkill since there isn't much benefit to to storing infrequently accessed on a really fast drive. If you are accessing almost all of your data all the time (like in a server application) then maybe an SSD is for you. For the rest of us there is the Momentus XT.

I am very particular about the noise with my MacBook Pro. The stock 250GB Seagate hard drive my laptop shipped with was virtually undetectable.
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167 of 174 people found the following review helpful By ooglek on June 28, 2010
Size Name: 500 GB
I've read a lot of reviews, some good, some bad. I think some people have this idea that the product will speed everything up all the time, and this sets bad expectations. What this drive will do is cache often used data, such as core Operating System files used at boot and commonly used applications, and store that data in its 4GB SSD-like cache. If your drive already reads and writes pretty fast, in the neighborhood of 75-100MBps (megaBytes not bits), other than boot up and application loading, you aren't going to notice much of a difference.

I use Apple's OS X Snow Leopard, and it definitely boots faster (1 minute 30 seconds prior to this disk, now 55 seconds from power on to ready + all my startup apps running), and commonly run applications also start up noticeably faster.

I upgraded from a bit slower drive, so I see some performance gain there, but nothing huge.

Overall I got the disk read speeds I was looking for -- faster boot, faster common app loading, and an overall boost in performance by upgrading from a slower drive altogether.

This drive won't change your life, unless you are booting several times a day or loading the same data repeatedly. It's a fine drive with the benefit of faster boot and common app loading times, nothing more.
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247 of 274 people found the following review helpful By Postnospam on December 23, 2010
Size Name: 500 GB Verified Purchase
If you are considering this drive based on reviews from professional reviewers, save yourself a lot of time, money and frustration by avoiding the Momentus XT drive.

This drive sounded just like what I was looking for, near SSD performance at a reasonable price. After installing the drive in my late 2008 MacBook Pro, it seemed a bit quicker and boot up time was noticeably faster. Unfortunately, a few days passed and the system started to hang for 5-10 seconds every 5 minutes or so. The system hangs then became longer and more frequent rendering the machine completely useless. A visit to the Seagate user forum quickly revealed that this problem is well known and very common.

I removed the Seagate Momentus XT drive and put the original Mac drive back in and all of the problems went away.

The drive was purchased and originally installed in October of 2010. After giving up on the drive and not returning it in time I went back to the Seagate site in December of 2010. To my pleasant surprise, Seagate had just released a firmware update to fix the problems. After installing the update, I installed the operating system from scratch. The system ran better than ever... I really thought this was a great drive. Then, the same problems came back, with a vengeance! The lock ups started after 4 days of use. This time there wasn't much of graceful decline. The system started to lock up as before and within 15 minutes, it was unusable. Another visit to the Seagate forums and I discovered others were experiencing the same issue.

While I like the premise of this drive, I would not purchase or recommend it.

Good luck!
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