I further observed that the write speed to the external USB drive, for Lucid, is a lot better than the read speed. I'm seeing write speeds around 30MB/s which is ok. However, the read speed continues to be extremely slow. Nautilus was telling me that the file transfer speed was around 5 MB/sec when copying from the external USB drive to an internal SATA drive. I started a capture using the command
before connecting the external drive and then beginning the copy of a 5 GB file from the external USB drive using Nautilus to copy the file to an internal SATA drive. After about 100 MB, I killed the trace with the CTRL-C key and then cancelled the copy.
The trace is about 2.6 MB of plain text. How can I get that to you? Surely you don't want me to try to paste it here?
I further observed that the write speed to the external USB drive, for Lucid, is a lot better than the read speed. I'm seeing write speeds around 30MB/s which is ok. However, the read speed continues to be extremely slow. Nautilus was telling me that the file transfer speed was around 5 MB/sec when copying from the external USB drive to an internal SATA drive. I started a capture using the command
cat /sys/kernel/ debug/usb/ usbmon/ 1u > /tmp/1u.mon.out
before connecting the external drive and then beginning the copy of a 5 GB file from the external USB drive using Nautilus to copy the file to an internal SATA drive. After about 100 MB, I killed the trace with the CTRL-C key and then cancelled the copy.
The trace is about 2.6 MB of plain text. How can I get that to you? Surely you don't want me to try to paste it here?