Comment 23 for bug 381300

ktp (kari-petersen) wrote :

My system runs on karmic.
uname -a:
Linux kplaptop 2.6.31-17-generic #54-Ubuntu SMP Thu Dec 10 17:01:44 UTC 2009 x86_64 GNU/Linux

Copying 155GB data to external usb drive with NTFS and cfq scheduler starts with around 30MB/s and drops to 9MB/s after transfering 10 to 15 GB and slows down to 2MB/s if I wait a little bit longer. Using Ext3 on the same disk and using cfq scheduler the datarate is around 22MB/s for the first 90 to 100GB and then drops down to 2MB/s. While copying the mount process was on top of cpu usage with around 4% and my desktop applications reacted a little bit slow. Using noop scheduler I get constant transfer rates of 21MB/s and no desktop starvation.