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Date:      Sun, 10 Oct 1999 21:58:04 -0500
From:      Dan Nelson <dnelson@emsphone.com>
To:        Greg Lehey <grog@lemis.com>
Cc:        patl@phoenix.volant.org, freebsd-questions@FreeBSD.ORG
Subject:   Re: Why use tape for backups? (was: backup method reccommendation?)
Message-ID:  <19991010215804.A50053@dan.emsphone.com>
In-Reply-To: <19991011120854.U78191@freebie.lemis.com>
References:  <19991011112417.S78191@freebie.lemis.com> <ML-3.4.939608472.9084.patl@asimov> <19991011120854.U78191@freebie.lemis.com>

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In the last episode (Oct 11), Greg Lehey said:
> On Sunday, 10 October 1999 at 19:21:12 -0700, patl@phoenix.volant.org wrote:
> > On 10-Oct-99 at 18:54, Greg Lehey (grog@lemis.com) wrote:
> >>> A second disk gets you only one generation of backup.  And if
> >>> something catastrophic happens during the backup, it may be
> >>> corrupted too leaving you with -no- backup.
> >>
> >> Well, that can happen with tapes, too.
> >
> > Yes, if you are foolish enough to reuse a single backup tape
> > instead of at least switching back and forth between two.  (Or,
> > better yet, having a real backup cycle among multiple tapes.)
> 
> The same argumentation applies to disks.

It's a lot easier to swap tapes than disks :)
 
> > Maybe DDS wasn't the right choice.  I've been using Exabyte 8mm
> > backups for years, both personally and at various companies; and
> > I've had more problems with disk drives going bad than I have with
> > tape drives.
> 
> I've used Exabyte and DDS.  I've had many problems with each.

Our company started with DDS, then moved to Exabyte, and now we're
using DLTs.  Our Exabyte drives needed cleaning every 5 full tape
passes, and our DLTs go months without cleaning.

For home users, either Exabyte or DDS is okay.

-- 
	Dan Nelson
	dnelson@emsphone.com


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