[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
- To: <firstname.lastname@example.org>, <email@example.com>
- Subject: Re: Compression
- From: "Edward H. Currie" <firstname.lastname@example.org>
- Date: Wed, 28 Oct 1998 12:57:20 -0500
- Old-Return-Path: <email@example.com>
- Resent-Date: Wed, 28 Oct 1998 13:45:22 -0500
- Resent-From: firstname.lastname@example.org
- Resent-Message-ID: <"gKHVdC.A.1jD.2r1N2"@kani.wwa.com>
- Resent-Sender: email@example.com
And then of course there's paper tape to be considered ...
From: Herbert R Johnson <firstname.lastname@example.org>
To: email@example.com <firstname.lastname@example.org>
Date: Wednesday, October 28, 1998 11:54 AM
Subject: Re: Compression
>On Tue, 27 Oct 1998 11:02:43 -0800, Chris Albertson
>*>Edward H. Currie wrote:
>*>> No one should ever store anything they care about on tape ... if you
>*>> this ask Ampex ...
>*>I just had a 4mm tape drive fail a couple weeks ago. It munched a
>*>tape just like VCRs sometimes do. If I had been reading my only
>*>copy of a backup tape I'd have lost a few GB of data.
>Redundancy is the only way to avoid this kind of failure.
>*>The basic fact is "Nothing is secure".
>*> Hard disks can be counted on to fail about every five years on
>*> average. I personnally have seen examples five years on either
>*> side of this average.
>Me too, but modern drives are pretty good - once you get past the
>first few months (approximately).
>*> CD-R can be destroyed by heat or bright light
>Maybe, but I've had one in a plastic case that I obtained a few years ago.
>Seem to be OK. I certainly would not put one in the sun, or leave it
>next to the toaster.
>*> Coatings can come off tape if not stored correctly and defective
>*> tape drives can destroy tapes
>...and CD's too: that aluminum coating on audio CD's for instance.
>*> The most common cause of data loss however, is acidental overwrite.
>If you use alternate media you can minimize this. Two or more backup
>sets of media, use them in rotation.
>*>One accepted rule is that data becomes secure if it is writen on
>*>three different media at two different locations. So one copy on
>Reasonable advice. Two sets are good, three is better. REminds me I
>need to backup *my* systems.
>Herbert R. Johnson http://pluto.njcc.com/~hjohnson
>email@example.com voice 609-771-1503, New Jersey USA
> amateur astronomer and astro-tour guide
> classic S-100 computers restoration & parts as "Dr. S-100"
> rebuilder/reseller of classic Macs for your computing pleasure
> and senior engineer at Astro Imaging Systems