From owner-freebsd-questions@freebsd.org Thu Jul 13 15:24:30 2017 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 66038DA6616 for ; Thu, 13 Jul 2017 15:24:30 +0000 (UTC) (envelope-from smithi@nimnet.asn.au) Received: from sola.nimnet.asn.au (paqi.nimnet.asn.au [115.70.110.159]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id CF29E7C0BF for ; Thu, 13 Jul 2017 15:24:29 +0000 (UTC) (envelope-from smithi@nimnet.asn.au) Received: from localhost (localhost [127.0.0.1]) by sola.nimnet.asn.au (8.14.2/8.14.2) with ESMTP id v6DFOP4B043990; Fri, 14 Jul 2017 01:24:26 +1000 (EST) (envelope-from smithi@nimnet.asn.au) Date: Fri, 14 Jul 2017 01:24:25 +1000 (EST) From: Ian Smith To: Doug Hardie cc: freebsd-questions@freebsd.org Subject: Re: Unusual Question In-Reply-To: <20170713231222.U20026@sola.nimnet.asn.au> Message-ID: <20170714011941.C20026@sola.nimnet.asn.au> References: <20170713231222.U20026@sola.nimnet.asn.au> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 13 Jul 2017 15:24:30 -0000 On Fri, 14 Jul 2017 01:12:17 +1000, Ian Smith wrote: > There is no oskip; I have to check dd(1) every time myself .. there's: > iseek=n Seek on the input file n blocks. This is synonymous with > skip=n. > oseek=n Seek on the output file n blocks. This is synonymous with > seek=n. [..] > > I didn't capture this but I did run the dd with the oskip of the big > > number and it showed all zeros. > > There is no oskip. oseek (aka skip) would work. Argh .. I've done it myself: that should say oseek (aka seek). For this very reason I _never_ use iseek or oseek, being quite confused enough :) cheers, Ian