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=HTML_MESSAGE, MAILING_LIST_MULTI autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 27816 invoked from network); 2 Jun 2020 04:58:52 -0000 Received: from minnie.tuhs.org (45.79.103.53) by inbox.vuxu.org with ESMTPUTF8; 2 Jun 2020 04:58:52 -0000 Received: by minnie.tuhs.org (Postfix, from userid 112) id AE12C9CA91; Tue, 2 Jun 2020 14:58:51 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id C8EA69C5F1; Tue, 2 Jun 2020 14:58:13 +1000 (AEST) Received: by minnie.tuhs.org (Postfix, from userid 112) id 59D6F9C5F1; Tue, 2 Jun 2020 14:58:11 +1000 (AEST) Received: from mail-pg1-f174.google.com (mail-pg1-f174.google.com [209.85.215.174]) by minnie.tuhs.org (Postfix) with ESMTPS id E81F093D46 for ; Tue, 2 Jun 2020 14:58:10 +1000 (AEST) Received: by mail-pg1-f174.google.com with SMTP id t7so3692361pgt.3 for ; Mon, 01 Jun 2020 21:58:10 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=p56Y7fmqCcH9yd90FyBJp1nRTu0jlDkj65PuDqnKC5U=; b=rUFd4AhJkFNOfAfq0ORJaMID5V/G02Hx1PNst2YizEXOw5aaGKoxJ8hK09LFPiMYq3 KfuLYr6Yuk0YGqfYpUIGjdFVd6BU5VD0Phq4gJ9j9Om+ImN8SBOn6HoTaX28aLO6rqbg p7pL5iabaLIN0SKavDPR7j0Jfms1KiYDrQr83xH1Q2r3zIPfOeJIktaTHVCANgMEjD4u SsHuKmbkLCmJyIHMqt9KSDlm5CfmwSiH6+6BE/fGPY6nm3wF+CCb1VnsQ5jJxcpcO/DA h9D3GzKjZqD1rSUZYewjpN4hlsLHDSmtIviDSdJdH/UUQGbWhqNLYyaZ+Uun/mrDxm8u 1vzA== X-Gm-Message-State: AOAM533y06PM88SMZfcIQni1w6NTxca28sZNNtF4N687nxywoGugYjWg bI64vJvLP+PW8AqisAg73XhLSBW9kRPpYcwJM+o= X-Google-Smtp-Source: ABdhPJxaJsFrVXlMdWHgNEPUwq3ig21Pss/lMY2f0NVvfvi8VQBogo4mjR93xtAgVlxwzpLlBKK6/9wCjDF4dfNEd1A= X-Received: by 2002:a63:3545:: with SMTP id c66mr21421398pga.82.1591073890310; Mon, 01 Jun 2020 21:58:10 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Paul Riley Date: Tue, 2 Jun 2020 12:57:54 +0800 Message-ID: To: Ronald Natalie Content-Type: multipart/alternative; boundary="0000000000000b204d05a712c25a" 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" --0000000000000b204d05a712c25a Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Thanks Ron, and all others. Theres plenty of grist for the mill, time for me to grind it. Paul *Paul Riley* Mo: +86 186 8227 8332 Email: paul@rileyriot.com On Tue, 2 Jun 2020 at 07:59, Ronald Natalie wrote: > As far as the early UNIXs go, any disk is collection of 512-byte blocks. > The filesystems either the early (what I=E2=80=99ll call V6) and the l= ater (V7) > don=E2=80=99t differ much. > The primary difference is that the later V7 had 16-bit uids and a > provision for larger file systems/sizes. The V6 file system was limite= d > to 2^24 blocks while V7 > did 2^32. > > The 512 block size corresponded to the native sector size of all the DEC > hardware except the RX which I think only had 128-byte sectors. But > again, we didn=E2=80=99t > do much with that other than write the standalone console disks for the > 780 (in RT format) and I also used it to make =E2=80=9Cunix=E2=80=9D file= system disks for > the BRL =E2=80=9CLOS=E2=80=9D > (little operating system=E2=80=A6no time for sharing, uniprocessor system= ) that > ran our internet routers and the IO hardware on the HEP supercomputer. > > > --0000000000000b204d05a712c25a Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Thanks Ron, and all others.

Theres plen= ty of grist for the mill, time for me to grind it.

Paul

Paul Riley

Mo: +86 = 186 8227 8332


<= br>
On Tue,= 2 Jun 2020 at 07:59, Ronald Natalie <ron@ronnatalie.com> wrote:
As far as the early UNIXs go, any disk is collection = of 512-byte blocks.=C2=A0 =C2=A0 =C2=A0The filesystems either the early (wh= at I=E2=80=99ll call V6) and the later (V7) don=E2=80=99t differ much.
The primary difference is that the later V7 had 16-bit uids and a provision= for larger file systems/sizes.=C2=A0 =C2=A0 The V6 file system was limited= to 2^24 blocks while V7
did 2^32.

The 512 block size corresponded to the native sector size of all the DEC ha= rdware except the RX which I think only had 128-byte sectors.=C2=A0 =C2=A0 = But again, we didn=E2=80=99t
do much with that other than write the standalone console disks for the 780= (in RT format) and I also used it to make =E2=80=9Cunix=E2=80=9D file syst= em disks for the BRL =E2=80=9CLOS=E2=80=9D
(little operating system=E2=80=A6no time for sharing, uniprocessor system) = that ran our internet routers and the IO hardware on the HEP supercomputer.=


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