On Sun, Jun 28, 2020 at 07:32:51PM +0100, Simon Arlott wrote: > I need to use "reboot=p" on my desktop because one of the PCIe devices > does not appear after a warm boot. This results in a very cold boot > because the BIOS turns the PSU off and on. > > The scsi sd shutdown process does not send a stop command to disks > before the reboot happens (stop commands are only sent for a shutdown). > > The result is that all of my SSDs experience a sudden power loss on > every reboot, which is undesirable behaviour because it could cause data > to be corrupted. These events are recorded in the SMART attributes. > > Add a "stop_before_reboot" module parameter that can be used to control > the shutdown behaviour of disks before a reboot. The default will be > the existing behaviour (disks are not stopped). > > sd_mod.stop_before_reboot=<integer> > 0 = disabled (default) > 1 = enabled > > The behaviour on shutdown is unchanged: all disks are unconditionally > stopped. What happened to the suggestion to treat reboot=p like a poweroff instead? That seems to be fundamentally the right thing to do.
