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Hard disk replacement


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#1 MalwareMutilator

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Posted 08 February 2015 - 09:08 AM

Hi everybody, :) 

 

I will be helping a friend change a failing hard drive on a SATA II controller to a new and larger drive.  I realize SATA III drives are backwards compatible, but I have a question:  SATA III drives are actually less expensive today than older SATA II drives, but is there a benefit to purchasing a real SATA II replacement?  It also seems that SATA III drives have a larger cache. 

 

Existing drive:  Seagate  ST3160812AS

 

Possible replacement: WD WDBH2D5000ENC-NRSN

 

Thanks



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#2 YeahBleeping

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Posted 08 February 2015 - 09:43 AM

There is no benefit in buying a HD with an SATA II controller.  And if /When an upgrade happens in the future you will be able to take advantage of the much higher speed capability of an SATA III controller/HD.



#3 mralias518

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Posted 08 February 2015 - 09:46 AM

Just to add to that this sums it up pretty good posted by Scan Disk

 

Difference between SATA I, SATA II and SATA III
What is the difference between SATA I, SATA II and SATA III?

SATA I (revision 1.x) interface, formally known as SATA 1.5Gb/s, is the first generation SATA interface running at 1.5 Gb/s. The bandwidth throughput, which is supported by the interface, is up to 150MB/s.

SATA II
 (revision 2.x) interface, formally known as SATA 3Gb/s, is a second generation SATA interface running at 3.0 Gb/s. The bandwidth throughput, which is supported by the interface, is up to 300MB/s.

SATA III (revision 3.x) interface, formally known as SATA 6Gb/s, is a third generation SATA interface running at 6.0Gb/s. The bandwidth throughput, which is supported by the interface, is up to 600MB/s. This interface is backwards compatible with SATA 3 Gb/s interface.

SATA II specifications provide backward compatibility to function on SATA I ports. SATA III specifications provide backward compatibility to function on SATA I and SATA II ports. However, the maximum speed of the drive will be slower due to the lower speed limitations of the port.

Example: SanDisk Extreme SSD, which supports SATA 6Gb/s interface and when connected to SATA 6Gb/s port, can reach up to550/520MB/s sequential read and sequential write speed rates respectively. However, when the drive is connected to SATA 3 Gb/s port, it can reach up to 285/275MB/s sequential read and sequential write speed rates respectively.


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#4 MalwareMutilator

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Posted 08 February 2015 - 10:01 AM

Thanks for the information.  Strange coincidence because I have two of the exact same Seagate drives on an old Dell system of mine.  Those are also going to be replaced soon.

 

Thanks again :thumbup2:






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