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Date:      Tue, 20 Nov 2001 12:09:38 +1030
From:      Greg Lehey <grog@FreeBSD.org>
To:        Anthony Atkielski <anthony@atkielski.com>
Cc:        Noor Dawod <noor@comrax.com>, freebsd-questions@FreeBSD.ORG
Subject:   Re: SCSI tape back that works under FreeBSD
Message-ID:  <20011120120938.M76318@monorchid.lemis.com>
In-Reply-To: <002f01c17162$7d190550$0a00000a@atkielski.com>
References:  <OF7F945520.F850FFD8-ONC1256B09.007D8B2D@use.ch> <002f01c17162$7d190550$0a00000a@atkielski.com>

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On Tuesday, 20 November 2001 at  2:27:09 +0100, Anthony Atkielski wrote:
> On  Monday, November 19, 2001 23:55, <FreeBSD@hm.homeip.net> wrote:
>> Hi Noor,
>>
>> generally from my experience I can't recomment DAT as a backup media. They
>> are cheap but also not very durable. I rather recommend DLT or LTO drives.
>>
>> The reason for this is simple my experience showed me, that a DAT media
>> gets unreadable after a year of use, then you have to buy new ones, with
>> DLTs or LTOs I really can say they last very much longer (I admit my
>> experience with LTOs is only for 2 years now ;-).
>
> I've never had trouble with DAT drives, and I've been using them for backups for
> years.

I've been using DDS (so-called DAT) drives for years too, and I've had
nothing but trouble with them.  I still estimate the average life to
be about 18 months.

> I verify every backup (not sure if this is possible on FreeBSD--?).

Of course it is.  I do that too.

> I rotate through a dozen tapes or so.  If you keep the drive clean
> and verify the tape content so that you know it is readable, it
> works very well.  The latest DAT drives can put at least 24 GB on
> one cassette.

40 GB.

Greg
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