SATA drive in USB3.0 Enclosure

meddylad said:

398GB left out of 465GB - so its only about 1/6th full

bang goes my theory that write speeds were so low cos it was full

meddylad said:

I have just put the drive into a standard SATA to USB connector and received exactly same speeds on usb2 as with the usb3 adapter - im sure that that is pretty slow even for usb2 standards, so im at a loss

USB is very slow haha and those speeds are in my experience pretty normal

meddylad said:

Many thanks for your help though, nice to know folks are around to help in times of need

No problem I just wish we had a better result

i ran a 7200RPM Barracuda in my eSata enclosure and a 5400RPM HD that I had recovered from a laptop when I installed an SSD. The results are below.

My conclusion is that it is the speed of the disk that rules the transfer speed. It would be interesting to test an SSD in both enclosures - but unfortunately I have no loose SSD lying around.

whs said:

i ran a 7200RPM Barracuda in my eSata enclosure and a 5400RPM HD that I had recovered from a laptop when I installed an SSD. The results are below.

My conclusion is that it is the speed of the disk that rules the transfer speed. It would be interesting to test an SSD in both enclosures - but unfortunately I have no loose SSD lying around.

No me neither :-( Nice speeds all the same and I agree with your conclusion.
When I copy between disks I get some very high speeds according to windows and I wonder if this is just a windows bug?
Copying 2,98GB using USB 3 from my Samsung RAID to a 2,5 laptop disc that has been rated previously in this thread by ATTO as being a lot slower

I have just the opposite. When I image to those disks (about 20GB of compressed image), the transfer speeds are a lot slower than the Atto numbers. And it is probably not CPU bound because that is an i7 running at a very low load when imaging.

whs said:

I have just the opposite. When I image to those disks (about 20GB of compressed image), the transfer speeds are a lot slower than the Atto numbers. And it is probably not CPU bound because that is an i7 running at a very low load when imaging.

Strange but then 20GB is a lot larger than the file I was moving and may have something to do with it.

I think next time I will check whether Write Caching is enabled. Last time I did not check that.

whs said:

I think next time I will check whether Write Caching is enabled. Last time I did not check that.

Its worth doing as it makes a difference best if you have a power supply to your externals

I have seperate power for the eSata enclosure, but not for the USB3.

whs said:

I have seperate power for the eSata enclosure, but not for the USB3.

Its only in case of a power interruption to avoid data loss I believe that is quite rare and have always enabled these options anyway for the speed benefit