----- Original Message ----- From: "Tony Duell via cctalk" <cctalk@classiccmp.org> To: <r...@jarratt.me.uk> Cc: "General Discussion: On-Topic and Off-Topic Posts" <cctalk@classiccmp.org>; "Shoppa, Tim" <tsho...@wmata.com> Sent: Thursday, April 20, 2017 11:48 PM Subject: Re: Bitsavers size
> On Thu, Apr 20, 2017 at 8:27 PM, Rob Jarratt > <robert.jarr...@ntlworld.com> wrote: >> >> >>> > The bitsavers archive is 267 Gbytes. >>> > >>> > So at 4.7G per DVD, it comes out to almost 60 DVD's. >>> >>> That is not totally ridiculous.... >>> >>> Now, if I want bitsavers on paper tape.... >>> >>> > >> >> My back of the envelope calculation comes to approximately >> 4 million miles of paper tape. > > I think you're out by a factor of 10.... 267*10^9 bytes, divide by 10 as > there are 10 bytes to the inch on paper tape, and convert to miles. I > get just over 400,000 miles. > > My rule of thumb is that a full reel of 1" paper tape is 100k bytes > So 10 for a megabyte > 10000 for a gigabyte > 2,670,000 for all of bitsavers. Perhaps nearer 3 million as it's an > approximation.... > > -tony ---- I've got a couple of reels that I can contribute if you don't have quite enough... ;-)