From owner-freebsd-hackers Tue Jun 6 11:51:44 2000 Delivered-To: freebsd-hackers@freebsd.org Received: from mail.enteract.com (mail.enteract.com [207.229.143.33]) by hub.freebsd.org (Postfix) with ESMTP id 0AA4E37BD81 for ; Tue, 6 Jun 2000 11:51:36 -0700 (PDT) (envelope-from dscheidt@enteract.com) Received: from shell-1.enteract.com (dscheidt@shell-1.enteract.com [207.229.143.40]) by mail.enteract.com (8.9.3/8.9.3) with SMTP id NAA35190; Tue, 6 Jun 2000 13:51:09 -0500 (CDT) (envelope-from dscheidt@enteract.com) Date: Tue, 6 Jun 2000 13:51:09 -0500 (CDT) From: David Scheidt To: Matthew Dillon Cc: Neil Blakey-Milner , Oleg Derevenetz , freebsd-hackers@FreeBSD.ORG Subject: Re: Write-protected floppy crash In-Reply-To: <200006061535.IAA94049@apollo.backplane.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Tue, 6 Jun 2000, Matthew Dillon wrote: : The behavior is probably outfall from buffer cache changes for 4.0, : but it would have to be fixed a different way. The buffer cache : changes were basically to not throw away dirty buffers with write errors : because doing so could result in extremely serious filesystem : corruption due to the system making modifications to meta data (the : dirty buffer) and then having them magically, randomly 'revert' out : from under it due to the write error. Result: catastrophic filesystem : corruption. Does it make a difference that this happens when you dd to the device, without going through a filesystem layer? I don't ever use filesystems on floppies, and have had this crash. David Scheidt To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message