From nobody Wed Oct 5 12:10:40 2022 X-Original-To: freebsd-hackers@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4MjD1G3ShMz4f5jF for ; Wed, 5 Oct 2022 12:10:42 +0000 (UTC) (envelope-from pauamma@gundo.com) Received: from mail.gundo.com (gibson.gundo.com [75.145.166.65]) by mx1.freebsd.org (Postfix) with ESMTP id 4MjD1F0y09z3Ntc for ; Wed, 5 Oct 2022 12:10:41 +0000 (UTC) (envelope-from pauamma@gundo.com) Received: from webmail.gundo.com (variax.gundo.com [75.145.166.70]) by mail.gundo.com (Postfix) with ESMTP id 515684C03F2 for ; Wed, 5 Oct 2022 07:10:40 -0500 (CDT) List-Id: Technical discussions relating to FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-hackers List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-hackers@freebsd.org MIME-Version: 1.0 Date: Wed, 05 Oct 2022 12:10:40 +0000 From: Pau Amma To: freebsd-hackers@freebsd.org Subject: Re: Block sizes for dd(1) to USB memory sticks (flash drives) for installers for FreeBSD In-Reply-To: <750a38c-2c86-a571-eb65-f63998b7649f@puchar.net> References: <1cede94a-c114-17fa-a81c-bb58c2b5879c@freebsd.org> <750a38c-2c86-a571-eb65-f63998b7649f@puchar.net> User-Agent: Roundcube Webmail/1.4.8 Message-ID: <3999539a33b13a2843ae50b5ba3c44fa@gundo.com> X-Sender: pauamma@gundo.com Organization: The Cabal (TINC) Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 4MjD1F0y09z3Ntc X-Spamd-Bar: --- Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=pass (policy=none) header.from=gundo.com; spf=pass (mx1.freebsd.org: domain of pauamma@gundo.com designates 75.145.166.65 as permitted sender) smtp.mailfrom=pauamma@gundo.com X-Spamd-Result: default: False [-4.00 / 15.00]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-1.00)[-0.999]; DMARC_POLICY_ALLOW(-0.50)[gundo.com,none]; R_SPF_ALLOW(-0.20)[+ip4:75.145.166.64/28]; RCVD_IN_DNSWL_MED(-0.20)[75.145.166.65:from]; RCVD_NO_TLS_LAST(0.10)[]; MIME_GOOD(-0.10)[text/plain]; RWL_MAILSPIKE_GOOD(-0.10)[75.145.166.65:from]; ASN(0.00)[asn:7922, ipnet:75.144.0.0/13, country:US]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MLMMJ_DEST(0.00)[freebsd-hackers@freebsd.org]; MIME_TRACE(0.00)[0:+]; ARC_NA(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; RCVD_COUNT_TWO(0.00)[2]; FROM_HAS_DN(0.00)[]; FREEFALL_USER(0.00)[pauamma]; HAS_ORG_HEADER(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; TO_DN_NONE(0.00)[]; PREVIOUSLY_DELIVERED(0.00)[freebsd-hackers@freebsd.org]; MID_RHS_MATCH_FROM(0.00)[] X-ThisMailContainsUnwantedMimeParts: N On 2022-10-03 08:26, Wojciech Puchar wrote: >> and >> elsewhere: >> >> bs=1m >> >> Why so small? > I've just checked. 128kB, 1MB and 4MB makes no noticable difference I remember someone in #freebsd (memory says debdrup) saying 128K is the largest amount FreeBSD will write to a file or device as a single unit. -- #BlackLivesMatter #TransWomenAreWomen #AccessibilityMatters #StandWithUkrainians English: he/him/his (singular they/them/their/theirs OK) French: il/le/lui (iel/iel and ielle/ielle OK) Tagalog: siya/niya/kaniya (please avoid sila/nila/kanila)