Bruce Cran wrote: > On Sunday 24 October 2010 17:31:58 Bruce Cran wrote: > >> Log: >> Mostly revert r203420, and add similar functionality into ada(4) since >> the existing code caused problems with some SCSI controllers.
Proper way would be IMHO to fix polling in aac driver. >> A new sysctl kern.cam.ada.spindown_shutdown has been added that controls >> whether or not to spin-down disks when shutting down. >> Spinning down the disks unloads/parks the heads - this is >> much better than removing power when the disk is still >> spinning because otherwise an Emergency Unload occurs which may cause >> damage to the actuator. > > The FLUSH CACHE + STANDBY IMMEDIATE commands are issued (instead of just > SLEEP) following the procedure documented in Fujitsu's MHW series product > documentation under section 1.10.1, "Recommended power-off sequence". Not instead of "just SLEEP", but instead of FLUSH CACHE (by respective peripheral driver) + SLEEP (by xpt). It should probably be the same. Just for the note, SCSI specification states that STOP automatically implies FLUSH CACHE. ATA - doesn't. -- Alexander Motin _______________________________________________ svn-src-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
