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Posts Tagged ‘SATA’

USB2 vs USB3 external HD benchmark

January 15th, 2013 No comments

 

Intro

 

In this post, I will benchmark an external USB disk, using HDTune and USBDeview. So, this is by no means a professional review, we are only comparing the obtained results. The disk I have used is a Seagate Momentus 7200.3 (120 GB, 7200 rpm), which I recovered from an older laptop. The Seagate is fitted in an el cheapo USB3 external disk enclosure, bought on Ebay for 15,00 Euros.

For the purpose of this test, the disk will simply be connected to an USB 2.0 port and benchmarked. Then it will be plugged in an USB 3.0 port, and benchmarked again. So, it is exactly the same disk, just a different port. The host computer is equipped with an Intel Core i5-2500 processor and 8 GB ram, and runs Win7 x64.

 

Test results

 

HDTune

 

  • USB 2.0 port
     

     
  • USB 3.0 port
     

 

USBDeview

 

  • USB 2.0 port
     

  •  

  • USB 3.0 port
     

 

 

Conclusion

 
Well, the results are not surprising: the Seagate achieves significantly better throughput when connected to an USB 3.0 port. The numbers simply double. This also demonstrates that USB 2.0 ports really are a bottleneck for external disks. Any regular laptop drive can read/write a lot more data than USB 2.0 can cope with.

So, if you are in the market for an external disk (or disk enclosure), do yourself a favor, and go for USB 3.0.  
 

Categories: benchmark, harddisk, hardware, USB Views: 358

HDD vs SSD on a Linux powered laptop

December 22nd, 2012 No comments

 

Intro

 
In this post, I will compare 3 laptop harddisks, under Linux, using hdparm. So, this is by no means a professional review, but since hdparm is shipped with every goddamn Linux distro out there, it makes it very easy to compare my results with yours.

The 3 (Sata) disks are:

  • Toshiba MK8046GSX : 80 GB, 8MB cache, 5400 rpm
  • Seagate Momentus 7200.3 : 120 GB, 16 MB cache, 7200 rpm
  • Samsung 840 series : 120 GB, 512 MB cache, SSD

So, the Toshiba and Seagate are “classic” mechanical harddisks, while the Samsung is a shiny new solid state disk.  The 3 disks are tested on a Dell Latitude E6500 laptop, equipped with a Core2 Duo P8600 processor and 4 GB ram. It runs Slackware 13.37 x64, with kernel 3.7.1.

 

Test results

 

  • Toshiba (5400 rpm):
    [root@E6500 ~]$ hdparm -Tt /dev/sda
    
     /dev/sda:
    
    Timing cached reads: 3806 MB in 2.00 seconds = 1903.02 MB/sec
    
    Timing buffered disk reads: 144 MB in 3.04 seconds = 47.40 MB/sec 

     

  • Seagate (7200 rpm):
    [root@E6500 ~]$ hdparm -Tt /dev/sda
    
    /dev/sda:
    
    Timing cached reads: 3822 MB in 2.00 seconds = 1911.02 MB/sec
    
    Timing buffered disk reads: 236 MB in 3.02 seconds = 78.25 MB/sec

     

  • Samsung 840 (SSD):
    [root@E6500 ~]$ hdparm -Tt /dev/sda
    
    /dev/sda:
    
    Timing cached reads: 3862 MB in 2.00 seconds = 1933.08 MB/sec
    
    Timing buffered disk reads: 808 MB in 3.00 seconds = 269.00 MB/sec

    The Samsung is cleary limited here by the Sata controller (Intel ICH9 Sata Raid controller), which is a Sata-300 controller.

 

Conclusion

 
Well, the results are hardly surprising: the old Toshiba is the slowest, the Seagate is significantly faster, but the Samsung simply wipes the floor with both of them. The Samsung plays in a whole different league, you can’t really compare them.
 
There is one thing to keep in mind when replacing your old hardisk with an SSD. The latest breed of SSD drives are capable of reaching sequential read/write speeds up to 500 MB/sec. That’s awesome, but it also means that your laptop will need a pretty recent Sata controller (to be specific, a SATA-600 controller) if you want to realise these high speeds.
 
Older laptops are equipped with SATA-300 or even SATA-150 controllers. This means that in reality, you will reach at most 270-280 MB/sec on a SATA-300 controller, which is still impressive, and up to 130-140 MB/sec on a SATA-150 controller, which still beats most, if not all mechanical laptop drives.
 
Consequently, on these older laptops, you don’t need the latest and fastest SSD drives available, because you will never get the most out of it. But don’t let this news spoil the fun, upgrading older laptops with SSD drives provides a very signifant performance boost, well worth the investment.
 

Categories: benchmark, harddisk, hardware, linux, SSD Views: 357