From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, HTML_MESSAGE,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 27574 invoked from network); 2 Jun 2020 15:44:45 -0000 Received: from minnie.tuhs.org (45.79.103.53) by inbox.vuxu.org with ESMTPUTF8; 2 Jun 2020 15:44:45 -0000 Received: by minnie.tuhs.org (Postfix, from userid 112) id 40E0D9CABC; Wed, 3 Jun 2020 01:44:43 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id 05A6D9C5E8; Wed, 3 Jun 2020 01:44:11 +1000 (AEST) Authentication-Results: minnie.tuhs.org; dkim=pass (1024-bit key; secure) header.d=mxes.net header.i=@mxes.net header.b="yY3uL366"; dkim-atps=neutral Received: by minnie.tuhs.org (Postfix, from userid 112) id 22E479C5E8; Wed, 3 Jun 2020 01:44:08 +1000 (AEST) Received: from smtp-out-3.mxes.net (smtp-out-3.mxes.net [198.205.123.68]) by minnie.tuhs.org (Postfix) with ESMTPS id CE58893D46 for ; Wed, 3 Jun 2020 01:44:03 +1000 (AEST) Received: from Customer-MUA (mua.mxes.net [10.0.0.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.mxes.net (Postfix) with ESMTPSA id 9BE1F75999; Tue, 2 Jun 2020 11:44:01 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mxes.net; s=mta; t=1591112642; bh=+zxy2bySaSCCwrRDwSaBvepcHb2AgU3o0j86n8C1+0M=; h=From:Message-Id:Content-Type:Mime-Version:Subject:Date: In-Reply-To:To:References; b=yY3uL366pxORSZ0q2gm+NdRpT8FPQm3CEheqWz0qlyF8d+jv/MhwwubmrpbfDuiHX BD7/xlG+o+l2tb7d8MQFWNq8uD//cdEaSq40lvERX4H1pcV9nhgWPWVfGo2L10cwJ/ Nj/lUHc9cTunX4wDAQFOg4CjoSQf7OnB8rS2ZZtE= From: Ronald Natalie Message-Id: Content-Type: multipart/alternative; boundary="Apple-Mail=_E3BB90FF-71B2-45C1-B4C3-BEB0505C4DFE" Mime-Version: 1.0 (Mac OS X Mail 13.4 \(3608.80.23.2.2\)) Date: Tue, 2 Jun 2020 11:44:00 -0400 In-Reply-To: To: Clem Cole References: X-Mailer: Apple Mail (2.3608.80.23.2.2) X-Sent-To: Subject: Re: [TUHS] DEC RL01/RL02 RX01/RX02 Disk Image Creator X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: TUHS main list Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" --Apple-Mail=_E3BB90FF-71B2-45C1-B4C3-BEB0505C4DFE Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 > On Jun 2, 2020, at 9:52 AM, Clem Cole wrote: >=20 >=20 > The good news is that all the DEC systems used 512 byte fixed blocks = much later than LSX so driver support is doubtful.=20 >=20 Except on the RX=E2=80=99s. The RX01 was 128 byte sectors and the = later ones 256 and a odd interleaving strategy. However, the boot = block and the rest of the file systems (both UNIX and RT at least) just aggregated the smaller (logical) sectors together to make a 512 = byte one.= --Apple-Mail=_E3BB90FF-71B2-45C1-B4C3-BEB0505C4DFE Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8

On Jun 2, 2020, at 9:52 AM, Clem Cole <clemc@ccc.com> = wrote:


The good news is that = all the DEC systems used 512 byte fixed blocks much later than LSX so = driver support is doubtful. 


Except on the = RX=E2=80=99s.   The RX01 was 128 byte sectors and the later ones = 256 and a odd interleaving strategy.    However, the boot = block and the rest of the file systems (both UNIX and RT at = least)
just aggregated the smaller (logical) = sectors together to make a 512 byte one.
= --Apple-Mail=_E3BB90FF-71B2-45C1-B4C3-BEB0505C4DFE--