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Windows 7: SATA drive in USB3.0 Enclosure


15 Apr 2011   #1

Windows 7 Ultimate 64 bit with SP1
 
 
SATA drive in USB3.0 Enclosure

Hello - i have a 2.5" Momentus drive (model ST9500420AS, 500GB 16MB cache) and was wondering would get USB3.0 speeds by using an external connector, a USB3.0 cable and my laptop which has built in USB3.0 ports (and the Renesas driver), so i can use it as a portable drive


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15 Apr 2011   #2

Windows 7 Ultimate x64
 
 

Quote   Quote: Originally Posted by meddylad View Post
Hello - i have a 2.5" Momentus drive (model ST9500420AS, 500GB 16MB cache) and was wondering would get USB3.0 speeds by using an external connector, a USB3.0 cable and my laptop which has built in USB3.0 ports (and the Renesas driver), so i can use it as a portable drive
Yes but all parts must be USB3 compliant
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15 Apr 2011   #3

Windows 7 Ultimate 64bit
 
 

No, you won't get the full USB3 speed (USB3 spec is higher than normal drives can transfer) but it will be faster than USB2.
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15 Apr 2011   #4

Windows 7 64 bit SP1. EFI boot partition., full EFI boot.
 
 

I have a Momentus in a USB 3.0 enclosure and connect it through the same NEC/Renesas USB3.0 chip . it runs at full speed and is not limited by the USB 3.0 interface. However the hard drive will only do 45 MB/s on the outer part of the platter and 35 MB/s averaged across the platters so don't expect much more than USB 2.0 speeds. Your drive is newer than mine so should fare a bit better.
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15 Apr 2011   #5

 

i would actually expect something closer to around 70MB/s

when i used my drive (its a monster of a drive btw) i got 130MB/s what that was with its cache off
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15 Apr 2011   #6
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

I made a comparson USB2/USB3 with the same enclosure on the same system. My USB3 was about 30% faster than USB2. But I would guess that you get different results with different hardware.
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15 Apr 2011   #7

W7x64 Pro, SuSe 12.1/** W7 x64 Pro, XP MCE
 
 

Quote   Quote: Originally Posted by GeneO View Post
I have a Momentus in a USB 3.0 enclosure and connect it through the same NEC/Renesas USB3.0 chip . it runs at full speed and is not limited by the USB 3.0 interface. However the hard drive will only do 45 MB/s on the outer part of the platter and 35 MB/s averaged across the platters so don't expect much more than USB 2.0 speeds. Your drive is newer than mine so should fare a bit better.
I get a lot better than that with my external drive, even though it is a slow RPM drive, and it is connected via eSATA 2.0. Is USB 3 that much slower than eSATA?


Attached Thumbnails
SATA drive in USB3.0 Enclosure-external-drive.png  
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16 Apr 2011   #8

 

Quote   Quote: Originally Posted by seekermeister View Post
Quote   Quote: Originally Posted by GeneO View Post
I have a Momentus in a USB 3.0 enclosure and connect it through the same NEC/Renesas USB3.0 chip . it runs at full speed and is not limited by the USB 3.0 interface. However the hard drive will only do 45 MB/s on the outer part of the platter and 35 MB/s averaged across the platters so don't expect much more than USB 2.0 speeds. Your drive is newer than mine so should fare a bit better.
I get a lot better than that with my external drive, even though it is a slow RPM drive, and it is connected via eSATA 2.0. Is USB 3 that much slower than eSATA?
well like i said, i did get 130 MB/s
My System SpecsSystem Spec
16 Apr 2011   #9

Windows 7 Ultimate x64
 
 

Quote   Quote: Originally Posted by seekermeister View Post
Is USB 3 that much slower than eSATA?
no its very similar


Attached Images
  
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16 Apr 2011   #10

Windows 7 Ultimate 64 bit with SP1
 
 

Im using AS SSD to run benchmarks but im gettin a strange result on my external usb3 drive. The sequential starts off at 30mb/s but then slowly drops to 1.4mb/s and stays at this speed - i cant see why it would be doing this.

Aslo, considering im using usb3 with all the correct componets, i thought i would be getting more than 30mb/s, considering the drive is a 7200rpm with 16mb cache

Out of curiosity, would the actual adapter circuit board (where the sata connects to the usb) be slowing it down or is that irrelevent
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 SATA drive in USB3.0 Enclosure




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