From owner-freebsd-questions@FreeBSD.ORG Sat Jul 11 19:08:06 2009 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 6278D1065670 for ; Sat, 11 Jul 2009 19:08:05 +0000 (UTC) (envelope-from steve@ibctech.ca) Received: from smtp.ibctech.ca (v6.ibctech.ca [IPv6:2607:f118::b6]) by mx1.freebsd.org (Postfix) with SMTP id 848788FC14 for ; Sat, 11 Jul 2009 19:08:04 +0000 (UTC) (envelope-from steve@ibctech.ca) Received: (qmail 69965 invoked by uid 89); 11 Jul 2009 19:08:03 -0000 Received: from unknown (HELO ?IPv6:2607:f118::5?) (steve@ibctech.ca@2607:f118::5) by 2607:f118::b6 with ESMTPA; 11 Jul 2009 19:08:03 -0000 Message-ID: <4A58E314.4040808@ibctech.ca> Date: Sat, 11 Jul 2009 15:08:04 -0400 From: Steve Bertrand User-Agent: Thunderbird 2.0.0.17 (Windows/20080914) MIME-Version: 1.0 To: xorquewasp@googlemail.com References: <20090711161132.GA74849@logik.internal.network> In-Reply-To: <20090711161132.GA74849@logik.internal.network> X-Enigmail-Version: 0.95.7 Content-Type: multipart/signed; protocol="application/x-pkcs7-signature"; micalg=sha1; boundary="------------ms020505000200030902050002" Cc: freebsd-questions@freebsd.org Subject: Re: ZFS scrub is finished? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 11 Jul 2009 19:08:06 -0000 This is a cryptographically signed message in MIME format. --------------ms020505000200030902050002 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit xorquewasp@googlemail.com wrote: > Hello. > > I'd like to write a little shell script to run 'zpool scrub' on > my disks weekly. I have two zpools. The manual page says that only > one 'scrub' can be active at a time. > > Is there any reliable way to run 'zpool scrub X' and then run > 'zpool scrub Y' when the first has finished? Perhaps it is as simple as cron-ing something like the following (of course, replace "zpool scrub" with my cat commands. I have three commands below, the second one in place only to verify that the commands 'did the right thing' by waiting for the first to finish. Note that if your second scrub command requires the first to exit without any errors, this will not be an appropriate solution, as you'll obviously want to catch the error and cancel the second scrub: % cat a.fil && sleep 3 && cat b.fil [1] 29821 this is a ... % this is b [1] Done ( cat a.fil && sleep 3 && cat b.fil ) If you want to run it at the command line, simply throw another '&' at the end of the entire command string to ensure that if your terminal terminates, the process(es) will continue thereafter. 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