From owner-freebsd-scsi Wed Jul 14 14:58:24 1999 Delivered-To: freebsd-scsi@freebsd.org Received: from dfw-ix5.ix.netcom.com (dfw-ix5.ix.netcom.com [206.214.98.5]) by hub.freebsd.org (Postfix) with ESMTP id 2F30714FCB for ; Wed, 14 Jul 1999 14:58:00 -0700 (PDT) (envelope-from asami@cs.berkeley.edu) Received: (from smap@localhost) by dfw-ix5.ix.netcom.com (8.8.4/8.8.4) id QAA15554; Wed, 14 Jul 1999 16:57:37 -0500 (CDT) Received: from sji-ca4-70.ix.netcom.com(205.186.212.198) by dfw-ix5.ix.netcom.com via smap (V1.3) id rma015510; Wed Jul 14 16:57:17 1999 Received: (from asami@localhost) by silvia.hip.berkeley.edu (8.9.3/8.6.9) id OAA15107; Wed, 14 Jul 1999 14:57:11 -0700 (PDT) Date: Wed, 14 Jul 1999 14:57:11 -0700 (PDT) Message-Id: <199907142157.OAA15107@silvia.hip.berkeley.edu> X-Authentication-Warning: silvia.hip.berkeley.edu: asami set sender to asami@cs.berkeley.edu using -f To: nisha@cs.berkeley.edu Cc: scsi@freebsd.org, nisha@cs.berkeley.edu In-reply-to: <199907142146.OAA16274@saffron.CS.Berkeley.EDU> (message from Nisha Talagala on Wed, 14 Jul 1999 14:46:35 PDT) Subject: Re: Question From: asami@freebsd.org (Satoshi - Ports Wraith - Asami) References: <199907142146.OAA16274@saffron.CS.Berkeley.EDU> Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org * I have a Quantum Atlas disk drive that appears to * be doing some form of delayed write optimization. * Is there any OS command or mode page change that can * turn it off? You mean to turn off write caching? I *think* it's the "WCE" (write cache enable) bit on modepage 8. You can edit it by the command camcontrol modepage -e -m 8 /dev/pass0 (omit the "-e" to just show the values). Satoshi To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message