I may have encountered a similar problem and might have some clues about a solution.
I'm using 9.04 server 2.6.28-11-server with an external usb disk which I use for backups and like to spin down when not in use. I have been using sdparm -C stop /dev/sdb with all partitions unmounted, which works OK with Suse 10.0 & 10.3 but not with Ubuntu. I think I'm encountering the same problem as reported above, the disk sounds like it's about to spin down and then immediately starts up again. I think the problem is due to the configuration of udev - although my understanding of this is pretty sketchy... The file: /lib/udev/rules.d/60-persistent-storage.rules appears to process change events and, in the case of a usb device, tries to obtain the usb_id. I think it is this which is waking the disk up again. This is probably also the case for other devices except that scsi_id is called instead. Comparing the udev config between Suse 10.3 and Ubuntu 9.04 I noticed that the Suse config is not processing change events - it contains the line: ACTION!="add", GOTO="persistent_storage_end" whereas the Ubuntu config contains this line: ACTION!="add|change", GOTO="persistent_storage_end" I've overridden the default Ubuntu config by copying /lib/udev/rules.d/60-persistent-storage.rules to /etc/udev/rules.d/60 -persistent-storage.rules and changing the ACTION! line to the Suse configuration. I can now spin down the disk successfully, however, this is a bit of a hack as I don't really know what I'm doing ;-) If anyone who knows rather more about udev is reading this then please correct my mistakes or explain the implications of this change! -- hard disk will not spin down with kernel 2.6.29-11 https://bugs.launchpad.net/bugs/359513 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
