On Wed, 16 Nov 2005, Alejandro Bonilla wrote: > On Sun, 13 Nov 2005 15:10:56 +0000, Pavel Machek wrote > > > I am currently doing a kernel module involves detecting/changing > > > disk mode among STANDBY and ACTIVE/IDLE. I used ide_cmd_wait() to issue > > > commands like WIN_IDLEIMMEDIATELY and WIN_STANDBYNOW1. The problem is, a > > > drive in standby mode will automatically awake whenever a disk operation > > > is requested and I need to know the mode change as soon as possible. (So I > > > > AFAIK there's no nice way to get that info, but it is useful, so > > patch would be welcome. > > I would check the hdparm man page again. Still, it sounds interesting. > > Additionally, it could be cool if someone could finish up or make the option > for the HD freeze to use it with the HDAPS driver. ;-) > > .Alejandro > Thanks for reply :) What I did to handle this problem is a little stupid : Suppose the disk is now in a standby mode. In case that there is a request sent to the disk drive, a kernel thread is awake to detect/update the current disk power mode. The disk power mode is stored in the ide_drive_t structure and be protected by lock. It seems to work fine in my simple tests. But again, there should be better solutions. Hui -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
