I am using Ubuntu 9.10 in a fairly standard configuration on an Asus P5KPL-CM motherboard. I have one WD SATA HDD and one Samsung SATA SH-S223 DVD drive. In addition to normal HDD activity the HDD LED is pulsing about one a second when the computer is 'idle'. I Googled and the consensus is, that the DVD is being checked for the insertion of a disk about once every second. Sure enough, I have tried disconnecting the SATA DVD and the LED pulsing stops. In view of the above I guess that the pulsing is probably normal as the driver is checking the DVD for disk insertion but I am curious if there is any way to stop the flashing from happening? Thank you. Ardo.