Dieter wrote on Wed, Dec 07, 2005 at 02:05:40PM +0000: > I'm trying to turn off the evil data corrupting on-disk write cache. > > I added hw.ata.wc=0 to /boot/loader.conf and rebooted. > > # sysctl hw.ata.wc > hw.ata.wc: 0 > > So far so good. But! atacontrol cap ad4 says: > > Feature Support Enable Value Vendor > write cache yes yes > > So hw.ata.wc thinks that the disk write cache is off, > but atacontrol cap thinks the disk write cache is on?
I remember this is working but there was a reporting problem in atacontrol. You should easily be able to tell whether it is on or off by the write performance. It should plummet by a factor of 4 or so. cstream -i- -o/mnt/wherever/tmpfile -v1 Martin -- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Martin Cracauer <cracauer@cons.org> http://www.cons.org/cracauer/ FreeBSD - where you want to go, today. http://www.freebsd.org/ _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
