Raspberry Pi Forums

I have a USB 3.0 2TB powered HD connected to the PI. And it is slow, transfering to it takes ages. Typical speed is 350 to 400 KB/ps. When I transfer directly to the SD card it goes ok, 5MB/ps. And transfering from the SD to the USB HD it again goes into slow mode.

When connected to a laptop the HD performs, so the problem must be with the PI somehow.

Have been searching the forums for a solution, but all are fairly technical and involve Linux coding. And I only have the Raspbmc.

Clues from different forums include:
1. USB HD drains power from the PI although itself is powered
2. Must have a USB powered hub to connect the HD
3. Firmware bugs

All suggestions are welcome and greatly appreciated

elatllat wrote:

Code: Select all

dmesg
mount
df -h

How can i run this on my Pi with Raspbmc and what does it do?

I still have this problem, have tried fitting a USB hub, this did not change anything.

Also, found another strange thing, I mounted a USB thumb drive, went into the file manager program. There I copied from the USB thumb drive to the USB HD, this went slow as always. But then I tried the other way, reading from the HD to the thumb drive, this went much faster, as one would expect in fact.

Perhaps reformating it to ext4 can help.
How does this show up in Windows ? As a NTFS drive ?
NTFS is cpu-intensive on the Pi platform.

ghans

ghans wrote:NTFS is cpu-intensive on the Pi platform.

Aha! Thanks. I've got the same problem. Will try ext4.

similar problem (& solution) to http://forum.stmlabs.com/showthread.php?tid=2819 ?

If you that with ext4 , you should easily get 6-7 mbps .
Did you try ntfs-3g instead of ntfs ?


ghans