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Written by Olin Coles   
Monday, 28 March 2011
Table of Contents: Page Index
Seagate Barracuda XT 3TB Hard Drive ST33000651AS
Features and Specifications
Drive Testing Methodology
Seagate Barracuda XT: SATA 3G vs 6G
AS-SSD Benchmark
ATTO Disk Benchmark
CrystalDiskMark 3.0 Tests
Iometer IOPS Performance
Short Stroke Disk Performance
Desktop Storage Final Thoughts
Seagate Barracuda XT Conclusion

Short Stroke Disk Performance

Not everyone is willing to make the leap into solid state technology, and with so many SSD failures resulting in catastrophic data loss there's still good reason to invest in a hard drive for your personal computer. Even so, there's an obvious difference in the overall performance you can expect between the two. The Seagate Barracuda XT series is designed for performance enthusiasts such as gamers, as well as small server systems. Enthusiast tools such as the free Seagate SeaTools software allows the user to custom-define firmware parameters to enable performance features such as 'Short Stroke'. With more capacity than a person might even realistically use, the 3TB Seagate Barracuda XT hard drive presents the ideal Short Stroke opportunity.

The EVEREST Disk Benchmark performs linear read and write bandwidth tests on each drive, and can be configured to use file chunk sizes up to 1MB (which speeds up testing and minimizes jitter in the waveform). Because of the full sector-by-sector nature of linear testing, mechanical storage products suffer a lower average bandwidth as the capacity draws linear read/write speed down into the inner-portion of the disk platter. In this particular example, we've demonstrated disk read/write speeds where only the outer-most portion is utilized.

All storage products tested with EVEREST Disk Benchmark are connected to the Intel ICH10 controller and use a 1MB block size option. Measuring the outer 15% of the 3TB Seagate Barracuda XT hard drive, which amounts to approximately 420 GB, the ST33000651AS model peaked at 166 MB/s read and write while averaging 154 MB/s. Partitioning the drive to use the outer portions will result in much faster performance than the inner sectors, and 154-166 MB/s is very close to the speeds of an average SSD.

Everest-Seagate-Barracuda-XT-ST33000651AS-Read.png

Linear tests are an important tool for comparing bandwidth speed between storage products - although HDD products suffer performance degradation over the span of their areal storage capacity. Linear bandwidth certainly benefits the Solid State Drive, since there's very little fluctuation in transfer speed. This is because Hard Disk Drive products decline in performance as the spindle reaches the inner-most sectors on the magnetic platter, away from the fast outer edge.

In the next section I share my final thoughts on the struggle between SSD and HDD technology, as well as their new hybrid counterpart, before delivering my conclusion and final product rating.



 

Comments 

 
# Cache sizeAthlonite 2011-03-29 04:26
Why are HDD manufacturers still # footing around with less than 256MB caches on bloody large HDD's when for an extra 3~5 dollars they could be putting 256 or more MegaBytes of DDR2 Ram on there as cache
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# RE: Seagate Barracuda XT 3TB Hard Drive ST33000651ASRahul 2011-03-29 05:44
I think that Olin Coles does not know that all the P67 boards equipped with the UEFI BIOS can run 2.19+ TB hard drives natively with a supported OS like Linux, Vista, 7 etc.
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# RE: RE: Seagate Barracuda XT 3TB Hard Drive ST33000651ASDavid Ramsey 2011-03-29 07:13
Olin does know this. You did read the part about "XP-safe software solution", right?
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# RE: RE: Seagate Barracuda XT 3TB Hard Drive ST33000651ASOlin Coles 2011-03-29 08:57
Actually Rahul , I installed this hard drive on an ASUS P8P67 EVO motherboard that has the UEFI and used Windows 7 64-bit OS, and it could not format the entire 3TB... only 2.19TB. So there, try doing some research before you come online to troll.

Also, UEFI replaced the BIOS, so a "UEFI BIOS" doesn't exist; only UEFI.
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# RE: Seagate Barracuda XT 3TB Hard Drive ST33000651ASRahul 2011-03-30 04:44
*These four sites claim that UEFI enabled or LGA1155 6 Series Chipset Motherboards support Hard Drives upto 9.4 Zettabytes or 10335409301094 Gigabytes ....
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# RE: RE: Seagate Barracuda XT 3TB Hard Drive ST33000651ASOlin Coles 2011-03-30 13:57
If you initialize any hard drive with a MBR (master boot record), it will not see more than 2.19 TB. If you initialize it with GPD (GUID Partition Table), which is available in Windows 7, it will see more than 2.2 TB. It really has nothing to do with the UEFI or chipset.
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# RE: RahulAustin Downing 2011-03-30 15:46
Actually the only thing UEFI did was make it so that systems could boot off of GPT partitions. Perhaps before bashing people who write these articles you should actually do some research of your own.
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# RE: Seagate Barracuda XT 3TB Hard Drive ST33000651ASdanwat1234 2011-07-30 14:49
Sincerely Hoping Hitachi or Seagate make a 5-platter version of this with 1TB/platter before the end of 2011! It'll bring storage prices down across the board!
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