Date: Mon, 26 Oct 1998 09:35:11 +0100 From: Ollivier Robert <roberto@keltia.freenix.fr> To: freebsd-fs@FreeBSD.ORG, freebsd-scsi@FreeBSD.ORG Subject: Re: filesystem safety and SCSI disk write caching Message-ID: <19981026093511.A14275@keltia.freenix.fr> In-Reply-To: <199810230013.RAA19305@salsa.gv.tsc.tdk.com>; from Don Lewis on Thu, Oct 22, 1998 at 05:13:09PM -0700 References: <199810230013.RAA19305@salsa.gv.tsc.tdk.com>
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According to Don Lewis: > That's certainly not my experience. Once the initiate_write_filepage > and newdirrem panics were fixed, my system has been completely stable. I agree. All my three systems are more stable now and the two using the ahc driver are faster under CAM. I've not see that much difference for the ncr driver. > I think you are thinking of NFS write caching. An NFS server isn't > supposed to tell the NFS client that the write has completed until No, I really talking about the WCE bit. SAM is very clear about this kernel value for HP-UX. There are two configurable variables, one is "async" mode (apparently you either have it for all I/O or not at all) and write caching (WCE). -- Ollivier ROBERT -=- FreeBSD: The Power to Serve! -=- roberto@keltia.freenix.fr FreeBSD keltia.freenix.fr 3.0-BETA #4: Thu Oct 15 01:36:57 CEST 1998 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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