Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

maskingtape123

macrumors newbie
Original poster
Nov 20, 2012
10
0
As above. Intend to get an external HDD enclosure that has USB 3.0 and USAP supported (USAP more expensive). I'm using an iMac 2011 which doesn't come with USB 3.0. However some articles stated that USAP will work for USB 2.0 as well. Is that so? If not probably I'll save the cash and get the normal ones instead. Thanks!
 

theSeb

macrumors 604
Aug 10, 2010
7,466
1,893
none
I think you mean UASP? USB 3 is backwards compatible period. Whether the enclosure supports UASP, or not, does not break the backwards compatibility.

In a nutshell, yes, it will work.
 

theSeb

macrumors 604
Aug 10, 2010
7,466
1,893
none
Yes UASP, however does it really speed up transfer speed? The chart stated that it does speed up on USB 3.0, however I'm not sure if that really works for a USB 2.0.

Anyway the enclosure is this: http://www.startech.com/HDD/Enclosures/USB-30-35in-SATA-HDD-Enclosure~S3510BMU33B

It definitely speeds up USB 3 transfer speeds. I am not sure if it speeds up USB 2 speeds, because I have never tested this and I have no Macs with USB 2 to try it out with my UASP enclosures.
 

maskingtape123

macrumors newbie
Original poster
Nov 20, 2012
10
0
It definitely speeds up USB 3 transfer speeds. I am not sure if it speeds up USB 2 speeds, because I have never tested this and I have no Macs with USB 2 to try it out with my UASP enclosures.

Thanks for your advice. I guess I'll just go ahead with it, shouldn't do any harm I hope (unless compatibility issue). Maybe in future if upgrade to newer iMac at least this still can work.:)
 

Richdmoore

macrumors 68000
Jul 24, 2007
1,956
355
Troutdale, OR
When i had a 2011 iMac, a thunderbolt 1 drive (SSD drive in a delock thunderbolt shell) worked great as a boot drive.

If you upgrade to a newer mac with usb 3, they all have UASP support, so if you are buying a new drive anyway it may help to have a "future proof one" depending on the costs and your needs.
 

Fishrrman

macrumors Penryn
Feb 20, 2009
28,448
12,567
OP:

There's nothing to worry about.

UASP will work just fine with USB2.

It's "backward compatible" and it will be "there, ready and waiting" when the time comes to "move up" to a faster Mac...
 

rpmurray

macrumors 68020
Feb 21, 2017
2,148
4,319
Back End of Beyond
The thing I was wondering about is if you would be able to see both drives over USB 2.0 using something like the OWC Dual Drive Dock. The USB 3 variant is inexpensive while the Thunderbolt one is quite pricy. I have a couple of 2011 iMacs which only support USB 2. I know the iMacs have Thunderbolt ports but I'm cheap.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.