<p dir="ltr">Actually the USB protocol can be limiting as well.</p>
<p dir="ltr">Check the USB card for UASP compatibility if you get one as well as the chassis.</p>
<p dir="ltr">UASP allows for multiple requests to be issued in parallel over USB 3.0. - Otherwise it will only use serial requests and never come close to using the bandwidth available.</p>
<div class="gmail_quote">On Mar 4, 2013 4:32 PM, "Ron Frazier (ALE)" <<a href="mailto:atllinuxenthinfo@techstarship.com">atllinuxenthinfo@techstarship.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
<br>
Alex Carver <<a href="mailto:agcarver%2Bale@acarver.net">agcarver+ale@acarver.net</a>> wrote:<br>
<br>
>On 3/4/2013 12:45, Ron Frazier (ALE) wrote:<br>
>><br>
>><br>
>> Calvin Harrigan <<a href="mailto:charriglists@bellsouth.net">charriglists@bellsouth.net</a>> wrote:<br>
>><br>
>>> On 3/4/2013 3:04 PM, Ron Frazier (ALE) wrote:<br>
>>>> I don't have any experience with PCI cards for this. For<br>
>enclosures,<br>
>>> I<br>
>>>> like the Vantec brand. Quality seems to be good. Some of them<br>
>have<br>
>>>> fans for cooling.<br>
>>>><br>
>>>> Ron<br>
>>>><br>
>>>> On 3/3/2013 2:47 PM, Alex Carver wrote:<br>
>>>>> Anyone have a suggestion for a good but not too expensive SATA PCI<br>
>>>>> (not express) card and/or external USB-SATA enclosure? The<br>
>>> enclosure<br>
>>>>> for my backup drive just died (the drive seems fine...I hope). I<br>
>>> just<br>
>>>>> need to pop it into a new box or just slip another card into the<br>
>>> case<br>
>>>>> (mobo has only IDE, no SATA).<br>
>>> +1 for Vantec<br>
>>> I have several, all several years old, none have failed to date.<br>
>>><br>
>><br>
>> Another PS. If you use a sata-usb enclosure, you can connect via<br>
>usb. No PCI card needed.<br>
>><br>
><br>
>I know, the Bytecc was a combo USB/SATA box. But I was pondering the<br>
>speed boost by going for SATA and moving the drive inside the machine.<br>
>I'm still pondering the choice though I may just go with the external<br>
>USB for simplicity. The reason for the PCI card is because I have no<br>
>SATA on my system so I would have to add on.<br>
><br>
<br>
Hi Alex,<br>
<br>
The fastest transfer I've gotten on an external USB2 interface is about 30 - 35 MBps. According to<br>
<br>
<a href="http://en.wikipedia.org/wiki/Universal_Serial_Bus" target="_blank">http://en.wikipedia.org/wiki/Universal_Serial_Bus</a><br>
<br>
The effective throughput for USB2 is 35 MBps. In this case, the bus is being saturated.<br>
<br>
With USB3, you get a throughput of 625 MBps on the interface according to the same article.<br>
<br>
According to this article on SATA<br>
<br>
<a href="http://en.wikipedia.org/wiki/Sata" target="_blank">http://en.wikipedia.org/wiki/Sata</a><br>
<br>
With SATA2, you get 300 MBps and with SATA3, you get 600 MBps.<br>
<br>
HOWEVER, the drive is going to be your limiting factor. I have SATA2 ports in my desktop machine and SATA spinning hard drives. The fastest drive to drive transfer I've ever gotten is in the 75 MBps range. So, with a spinning HDD, you could probably double your transfer speed by going to internal or external SATA or USB3. If you had an SSD, which, choosing one at random from a magazine I have, reports read and write speeds in the 500 MBps range, you could saturate a SATA2 bus and come close to saturating a SATA3 or USB3 bus.<br>
<br>
Sincerely,<br>
<br>
Ron<br>
<br>
<br>
<br>
<br>
--<br>
<br>
Sent from my Android Acer A500 tablet with bluetooth keyboard and K-9 Mail.<br>
Please excuse my potential brevity if I'm typing on the touch screen.<br>
<br>
(PS - If you email me and don't get a quick response, you might want to<br>
call on the phone. I get about 300 emails per day from alternate energy<br>
mailing lists and such. I don't always see new email messages very quickly.)<br>
<br>
Ron Frazier<br>
770-205-9422 (O) Leave a message.<br>
linuxdude AT <a href="http://techstarship.com" target="_blank">techstarship.com</a><br>
<br>
<br>
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</blockquote></div>