From owner-freebsd-fs@FreeBSD.ORG Wed Apr 21 02:48:06 2010 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 3ADDB1065670 for ; Wed, 21 Apr 2010 02:48:06 +0000 (UTC) (envelope-from areilly@bigpond.net.au) Received: from nschwmtas06p.mx.bigpond.com (nschwmtas06p.mx.bigpond.com [61.9.189.152]) by mx1.freebsd.org (Postfix) with ESMTP id B9D518FC15 for ; Wed, 21 Apr 2010 02:48:05 +0000 (UTC) Received: from nschwotgx02p.mx.bigpond.com ([124.188.161.100]) by nschwmtas06p.mx.bigpond.com (InterMail vM.7.05.02.08 201-2174-114-118-20080528) with ESMTP id <20100421024803.CMQR18201.nschwmtas06p.mx.bigpond.com@nschwotgx02p.mx.bigpond.com>; Wed, 21 Apr 2010 02:48:03 +0000 Received: from duncan.reilly.home ([124.188.161.100]) by nschwotgx02p.mx.bigpond.com with ESMTP id <20100421024803.UDTM2131.nschwotgx02p.mx.bigpond.com@duncan.reilly.home>; Wed, 21 Apr 2010 02:48:03 +0000 Date: Wed, 21 Apr 2010 12:48:03 +1000 From: Andrew Reilly To: David N Message-ID: <20100421024803.GA25701@duncan.reilly.home> References: <20100418235428.GC4620@duncan.reilly.home> <20100420234447.GB1737@garage.freebsd.pl> <20100421011834.GA24928@duncan.reilly.home> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.3i X-Authentication-Info: Submitted using SMTP AUTH LOGIN at nschwotgx02p.mx.bigpond.com from [124.188.161.100] using ID areilly@bigpond.net.au at Wed, 21 Apr 2010 02:48:03 +0000 X-RPD-ScanID: Class unknown; VirusThreatLevel unknown, RefID str=0001.0A150203.4BCE6763.0102,ss=1,fgs=0 X-SIH-MSG-ID: oxs6FNz4TAD0zmQs0WyzOwJxyArnqyN48Z4QX81loRIGTUDCp8DeQ9rEJvdRsM6kxDxNJhqHNGUoaaznTY3Rs9mK Cc: freebsd-fs@freebsd.org Subject: Re: gjournal: what is it good for? X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 21 Apr 2010 02:48:06 -0000 Hi David, On Wed, Apr 21, 2010 at 12:20:46PM +1000, David N wrote: > Gjournal on my systems are pretty quick on startup after a power outtage. Great to hear! > What kind of disks are you using? Or what hardware are you using? Several: main /usr is on a gjournal on top of a gmirror over a pair of Samsung 1TB 3.5" SATA drives, but I have other gjournals on a 750G WD SATA, a 1.5T Seagate and another 1TB WD MyBook firewire unit. There is brokenness in the firewire connection that results in me always coming up manually through single-user mode, at the moment. In single user mode pilot error is sufficient to account for the problems that I was having with mount vs fsck of the gjournalled drives, I'm fairly sure. The firewire issue is strange: at boot-up the fw stack (this is 9-current) doesn't reset the bus well enough or for long enough for the drive to be fully recognised and show up in /dev, but a post-boot "fwcontrol -r" does the job nicely. It's a bit inconvenient that fwcontrol is in /usr/sbin, rather than /sbin, so it's not available until the rest of the mounts are complete. USB "works" but is sufficiently slower that I'm prepared to hand-hold the boot process in order to have my backups finish in reasonable time. > Might be the disks are ignoring the BIO_FLUSH. Not sure: how could I tell? Thanks for the support and suggestions. Cheers, -- Andrew