From owner-freebsd-questions@FreeBSD.ORG Fri Nov 21 09:01:20 2008 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 1A2EC1065674 for ; Fri, 21 Nov 2008 09:01:20 +0000 (UTC) (envelope-from Johan@double-l.nl) Received: from smtp-vbr11.xs4all.nl (smtp-vbr11.xs4all.nl [194.109.24.31]) by mx1.freebsd.org (Postfix) with ESMTP id 8DEC28FC0C for ; Fri, 21 Nov 2008 09:01:19 +0000 (UTC) (envelope-from Johan@double-l.nl) Received: from w2003s01.double-l.local (double-l.xs4all.nl [80.126.205.144]) by smtp-vbr11.xs4all.nl (8.13.8/8.13.8) with ESMTP id mAL91C4a093951; Fri, 21 Nov 2008 10:01:17 +0100 (CET) (envelope-from Johan@double-l.nl) Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="windows-1250" Content-Transfer-Encoding: quoted-printable X-MimeOLE: Produced By Microsoft Exchange V6.5 Date: Fri, 21 Nov 2008 10:01:10 +0100 Message-ID: <57200BF94E69E54880C9BB1AF714BBCB5DE2B0@w2003s01.double-l.local> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: ZFS Recovery Tools Thread-Index: AclLtbJeW2PMhhdPTbSku/T55x8nqAAAdT6w References: <02c801c94b40$4b6a2f10$e23e8d30$@za.net> <20081120204756.O16829@wojtek.tensor.gdynia.pl> <20081120222909.K17356@wojtek.tensor.gdynia.pl><139b44430811202326j6eafb93fgde2a55c1564da68f@mail.gmail.com> <20081121094146.P19920@wojtek.tensor.gdynia.pl> From: "Johan Hendriks" To: "Wojciech Puchar" X-Virus-Scanned: by XS4ALL Virus Scanner Cc: freebsd-questions@freebsd.org Subject: RE: ZFS Recovery Tools 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: Fri, 21 Nov 2008 09:01:20 -0000 > What does MAXPHYS mean (yes max raw I/O transfer) and do? A little > bit more specific if you may. how large can be single read from disk. when you say read 2 files in the same time, FreeBSD will readahead at = most=20 MAXPHYS from one file, then from file 2, from file 1 etc. 128kB/s is way too much for todays drives, that can read 1MB within one=20 access time. 128kB/s is way to much , and you set it to 1024, or did you mean way to = low ? Regards, Johan Hendriks No virus found in this outgoing message. Checked by AVG - http://www.avg.com=20 Version: 8.0.175 / Virus Database: 270.9.4/1795 - Release Date: = 17-11-2008 17:24