On Sun, Feb 20, 2011 at 12:39:06PM +0100, Mark Kettenis wrote: > > Date: Sun, 20 Feb 2011 19:54:21 +1000 > > From: David Gwynne <l...@animata.net> > > > > > how to manipulate write cache policy? > > > > the lsi firmwares dont implement handling of the mod page changes > > unfortunately. you could call the ioctl this implements yourself > > though from userland. > > David, while I think that implementing the cache manipulation ioctls > for mpii(4) is a good idea, there is a problem here. We don't have a > tool in base that actually issues those ioctls. And unless I'm > misreading the diff, this still leaves the cache disabled on the > stupid Dell.
DIOCSCACHE is called in sdattach() to enable write cache for all disks that DIOCGCACHE reports as having write cache disabled. Or are you concerned that we have no way to manipulate it from userland if/when the default needs to be modified? .... Ken
