thanks "Leann Ogasawara " it's works. after i installed linux-image-2.6.25.1 here is my hdparm result.
before------ /dev/sdb: Timing cached reads: 2 MB in 2.08 seconds = 984.59 kB/sec Timing buffered disk reads: 4 MB in 4.19 seconds = 978.71 kB/sec /dev/sda: Timing cached reads: 1220 MB in 2.00 seconds = 609.37 MB/sec Timing buffered disk reads: 56 MB in 3.07 seconds = 18.24 MB/sec after----------------------------- /dev/sdb: Timing cached reads: 1574 MB in 2.00 seconds = 786.84 MB/sec Timing buffered disk reads: 174 MB in 3.03 seconds = 57.50 MB/sec /dev/sda: Timing cached reads: 1492 MB in 2.00 seconds = 746.06 MB/sec Timing buffered disk reads: 80 MB in 3.03 seconds = 26.39 MB/sec what a big bug with linux-image-2.6.24.16. -- Wrong UDMA mode due to error in 40/80 wire cable detection https://bugs.launchpad.net/bugs/195221 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
