@Manoj I have a theory after some other partically related issues with a USB 3.0 drive found in a disscussion on the udev mailing list. Can you remove /lib/udev/85-hdparm.rules & reboot and see it works.
It may be hdparm at fault? -- Some firewire disks not working under 10.04 https://bugs.launchpad.net/bugs/548513 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