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=MAILING_LIST_MULTI, RCVD_IN_DNSWL_NONE autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 1872 invoked from network); 11 Aug 2020 23:56:44 -0000 Received: from minnie.tuhs.org (45.79.103.53) by inbox.vuxu.org with ESMTPUTF8; 11 Aug 2020 23:56:44 -0000 Received: by minnie.tuhs.org (Postfix, from userid 112) id 368329CAAE; Wed, 12 Aug 2020 09:56:41 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id CFE31944AA; Wed, 12 Aug 2020 09:55:59 +1000 (AEST) Received: by minnie.tuhs.org (Postfix, from userid 112) id 2863293D6A; Wed, 12 Aug 2020 09:55:56 +1000 (AEST) Received: from viclamta06p.bpe.bigpond.com (viclamta06p.bpe.bigpond.com [203.38.21.70]) by minnie.tuhs.org (Postfix) with ESMTPS id 9E48E93D06 for ; Wed, 12 Aug 2020 09:55:54 +1000 (AEST) Received: from smtp.telstra.com ([10.10.26.4]) by viclafep06p-svc.bpe.nexus.telstra.com.au with ESMTP id <20200811235552.YRZD7934.viclafep06p-svc.bpe.nexus.telstra.com.au@smtp.telstra.com> for ; Wed, 12 Aug 2020 09:55:52 +1000 X-RG-Spam: Unknown X-RazorGate-Vade: gggruggvucftvghtrhhoucdtuddrgeduiedrledugddvjecutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfupfevtfgpvffgnffuvffttedpqfgfvfenuceurghilhhouhhtmecugedttdenucenucfjughrpeffhffvufgjkfhffgggtgesthdttddttdervdenucfhrhhomhepffgrvhgvucfjohhrshhfrghllhcuoegurghvvgeshhhorhhsfhgrlhhlrdhorhhgqeenucggtffrrghtthgvrhhnpeekieetjeeuuefhfeeguedvudeifeevudfgvedtffekhfffjeekhfdutdetheethfenucfkphepuddutddrudeguddrudelfedrvdeffeenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhephhgvlhhopegrnhgvuhhrihhnrdhhohhrshhfrghllhdrohhrghdpihhnvghtpeduuddtrddugedurdduleefrddvfeefpdhmrghilhhfrhhomhepoegurghvvgeshhhorhhsfhgrlhhlrdhorhhgqedprhgtphhtthhopeeothhuhhhssehtuhhhshdrohhrgheq X-RazorGate-Vade-Verdict: clean 0 X-RazorGate-Vade-Classification: clean X-RG-VS-CLASS: clean Received: from aneurin.horsfall.org (110.141.193.233) by smtp.telstra.com (5.8.420) id 5E8A564B16594FE7 for tuhs@tuhs.org; Wed, 12 Aug 2020 09:55:51 +1000 Received: from aneurin.horsfall.org (localhost [127.0.0.1]) by aneurin.horsfall.org (8.15.2/8.15.2) with ESMTP id 07BNtodO014248 for ; Wed, 12 Aug 2020 09:55:50 +1000 (EST) (envelope-from dave@horsfall.org) Received: from localhost (dave@localhost) by aneurin.horsfall.org (8.15.2/8.15.2/Submit) with ESMTP id 07BNtoTx014245 for ; Wed, 12 Aug 2020 09:55:50 +1000 (EST) (envelope-from dave@horsfall.org) X-Authentication-Warning: aneurin.horsfall.org: dave owned process doing -bs Date: Wed, 12 Aug 2020 09:55:49 +1000 (EST) From: Dave Horsfall To: The Eunuchs Hysterical Society In-Reply-To: <2d723104-6461-08ba-9235-99b06622f9fa@softjar.se> Message-ID: References: <6a0063f8-128d-751d-114f-a0f811d02098@gmail.com> <2cb3ad2a-f8c5-a003-661c-e257f7cbe38c@softjar.se> <5A12E0BB-4FFF-4C3E-B486-D4E852FAA97F@comcast.net> <2d723104-6461-08ba-9235-99b06622f9fa@softjar.se> User-Agent: Alpine 2.21.9999 (BSF 287 2018-06-16) X-GPG-Public-Key: http://www.horsfall.org/gpgkey.pub X-GPG-Fingerprint: 05B4 FFBC 0218 B438 66E0 587B EF46 7357 EF5E F58B X-Home-Page: http://www.horsfall.org/ X-Witty-Saying: "chmod 666 the_mode_of_the_beast" MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Subject: Re: [TUHS] [simh] 2bsd tarball 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: , Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" On Wed, 29 Jul 2020, Johnny Billquist wrote: > However, seek times on DECtape aren't really comparable to magtape > either. Because DECtape deals with absolute block numbers. So you can > always, no matter where you are, find out where you are, and how far you > will need to move to get to the correct block. > > With magtapes, this is pretty much impossible. You'll have to rewind, > and then start seeking. Not if you used 512-byte blocks, and mounted it read-only; that way, you could use it as a file system (and I did, just for fun). Oh, you also needed a clever tape driver, of course. And the IRG was a bit of a problem, chewing up a lot of tape space. I posted this here a while back, and some idiot (his name is not important) practically called me a liar, until he was handed his arse on a plate by someone else with better knowledge than him. -- Dave