From owner-freebsd-arch Fri Dec 7 6:59:50 2001 Delivered-To: freebsd-arch@freebsd.org Received: from axl.seasidesoftware.co.za (axl.seasidesoftware.co.za [196.31.7.201]) by hub.freebsd.org (Postfix) with ESMTP id 819BA37B417 for ; Fri, 7 Dec 2001 06:59:47 -0800 (PST) Received: from sheldonh (helo=axl.seasidesoftware.co.za) by axl.seasidesoftware.co.za with local-esmtp (Exim 3.33 #1) id 16CMV0-0008aP-00; Fri, 07 Dec 2001 17:01:14 +0200 From: Sheldon Hearn To: Bob Bishop Cc: Kirk McKusick , freebsd-arch@FreeBSD.ORG, Matthew Dillon Subject: Re: Using a larger block size on large filesystems In-reply-to: Your message of "Fri, 07 Dec 2001 16:15:36 +0200." <32520.1007734536@axl.seasidesoftware.co.za> Date: Fri, 07 Dec 2001 17:01:14 +0200 Message-ID: <33008.1007737274@axl.seasidesoftware.co.za> Sender: owner-freebsd-arch@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Fri, 07 Dec 2001 16:15:36 +0200, Sheldon Hearn wrote: > Okay, in that case, the threshold needs to be 196MB, from which size > upward we're guaranteed of at least one backup superblock. > > I'll get cracking on making the new defaults size-sensitive and post > back my modified patchset when I'm done. Yuk. :-( This really shouldn't be size-sensitive. It should be sensitive to the number of cylinder groups. The problem is that ncpg is calculated in mkfs.c, but we need it in newfs.c when we decide whether defaulting to 16384/2048 is going to be okay. :-( Ciao, Sheldon. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message