From nobody Wed Oct 05 13:43:31 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 4MjG4b20GDz4fG7Z for ; Wed, 5 Oct 2022 13:43:43 +0000 (UTC) (envelope-from wojtek@puchar.net) Received: from puchar.net (puchar.net [194.1.144.90]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4MjG4Y3rQmz3VnW for ; Wed, 5 Oct 2022 13:43:41 +0000 (UTC) (envelope-from wojtek@puchar.net) Received: Received: from 127.0.0.1 (localhost [127.0.0.1]) by puchar.net (8.15.2/8.16.1) with ESMTPS id 295DhVIn085559 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Wed, 5 Oct 2022 15:43:32 +0200 (CEST) (envelope-from wojtek@puchar.net) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=puchar.net; s=default; t=1664977412; bh=SQO+r5ntk/T/B2YsJyXEA3BMFY7pa+CsjCxut/gDWyI=; h=Date:From:To:cc:Subject:In-Reply-To:References; b=uWqNv9aOmuMVcC1knLG/YAl4wneOEvT7lFhwKRAmz4JPUhW8pLGsUGGRvlpbRdq1h a5RzuARf4COjnCGtigpZHwrWaIMO7zriS1/yUGTbiwiExi/0q2ST+cqI60PQbTrVP4 CrWJtuA/Els8Tty7Cq/YH6gJO3eWYTB4rgebIpMI= Received: from wojtek.intra (localhost [127.0.0.1]) by wojtek.intra (8.16.1/8.16.1) with ESMTP id 295DhV8U071307; Wed, 5 Oct 2022 15:43:31 +0200 (CEST) (envelope-from wojtek@puchar.net) Received: from localhost (wojtek@localhost) by wojtek.intra (8.16.1/8.16.1/Submit) with ESMTP id 295DhVmc071304; Wed, 5 Oct 2022 15:43:31 +0200 (CEST) (envelope-from wojtek@puchar.net) X-Authentication-Warning: wojtek.intra: wojtek owned process doing -bs Date: Wed, 5 Oct 2022 15:43:31 +0200 (CEST) From: Wojciech Puchar To: Pau Amma cc: freebsd-hackers@freebsd.org Subject: Re: Block sizes for dd(1) to USB memory sticks (flash drives) for installers for FreeBSD In-Reply-To: <3999539a33b13a2843ae50b5ba3c44fa@gundo.com> Message-ID: References: <1cede94a-c114-17fa-a81c-bb58c2b5879c@freebsd.org> <750a38c-2c86-a571-eb65-f63998b7649f@puchar.net> <3999539a33b13a2843ae50b5ba3c44fa@gundo.com> 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 Content-Type: text/plain; charset=US-ASCII; format=flowed X-Rspamd-Queue-Id: 4MjG4Y3rQmz3VnW X-Spamd-Bar: --- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=puchar.net header.s=default header.b=uWqNv9aO; dmarc=none; spf=pass (mx1.freebsd.org: domain of wojtek@puchar.net designates 194.1.144.90 as permitted sender) smtp.mailfrom=wojtek@puchar.net X-Spamd-Result: default: False [-3.50 / 15.00]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-1.00)[-1.000]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; R_SPF_ALLOW(-0.20)[+mx]; R_DKIM_ALLOW(-0.20)[puchar.net:s=default]; MIME_GOOD(-0.10)[text/plain]; FROM_EQ_ENVFROM(0.00)[]; MLMMJ_DEST(0.00)[freebsd-hackers@freebsd.org]; ARC_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; RCPT_COUNT_TWO(0.00)[2]; RCVD_TLS_LAST(0.00)[]; DKIM_TRACE(0.00)[puchar.net:+]; RCVD_COUNT_THREE(0.00)[3]; ASN(0.00)[asn:43476, ipnet:194.1.144.0/24, country:PL]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_SOME(0.00)[]; TO_DN_SOME(0.00)[]; DMARC_NA(0.00)[puchar.net]; HAS_XAW(0.00)[]; MID_RHS_MATCH_FROM(0.00)[] X-ThisMailContainsUnwantedMimeParts: N unless you have options MAXPHYS=4194304 like i do On Wed, 5 Oct 2022, Pau Amma wrote: > 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) > > >