Hello everyone,
I got a new external harddrive (Trekstor DS maxi g.u 1000MB) with 2 partitions (one ext3, one FAT), mainly for doing backups of my desktop computer.
The problem is: It only runs with USB1.1 on my desktop running Suse 11.0, limiting the data transfer rate to 1 MB/s.
It ran fine with USB2.0 on my laptop (first running Suse 10.2, now 11.1), and other devices (e.g. the Ipod and Memory Sticks) run at full speed with USB2.0 on the same USB port, so both the divice and the port seem to be ok, just not the combination of both 
lsusb finds it ok:
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 005: ID 0c0b:b159 Dura Micro, Inc. (Acomdata)
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
“dmesg | grep usb” tells me the following:
usb 2-1: New USB device found, idVendor=05ac, idProduct=1261
usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 2-1: Product: iPod
usb 2-1: Manufacturer: Apple Inc.
usb 2-1: SerialNumber: …
usb-storage: device found at 4
usb-storage: waiting for device to settle before scanning
usb-storage: device scan complete
usb 2-1: USB disconnect, address 4
usb 2-1: new full speed USB device using uhci_hcd and address 5
usb 2-1: configuration #1 chosen from 1 choice
usb-storage: device found at 5
usb-storage: waiting for device to settle before scanning
usb 2-1: New USB device found, idVendor=0c0b, idProduct=b159
usb 2-1: New USB device strings: Mfr=2, Product=3, SerialNumber=1
usb 2-1: Product: DS maxi g.u
usb 2-1: Manufacturer: TrekStor
usb 2-1: SerialNumber: 00e6Bb63
usb-storage: device scan complete
Although I’m not quite sure if the “new full speed USB device …” line still belongs to the Ipod or the ExtHDD I’m puzzled why it does not run at high speed.
Any hints or suggestions are highly appreciated.
Cheers
Ralf