Date: Thu, 10 Sep 1998 11:54:26 +0300 (EEST) From: "Oleg V. Naumann" <oleg@reis.zp.ua> To: Warner Losh <imp@village.org> Cc: questions@FreeBSD.ORG, "Chad R. Larson" <chad@freebie.dcfinc.com> Subject: Re: SCSI tape drives Message-ID: <XFMail.980910115426.oleg@reis.zp.ua> In-Reply-To: <199809100837.CAA02460@harmony.village.org>
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On 10-Sep-98 Warner Losh wrote:
> In message <XFMail.980910103447.oleg@reis.zp.ua> "Oleg V. Naumann" writes:
>: Seagate Travan TR-4 (SCSI) do not properly detect eom (End Of Media).
>
> Nor do any of the other scsi tape drives, iirc. At least the driver
> doesn't.
In FreeBSD-1.1.* times my old external Archive Viper 150
SCSI-1 on Adaptec AHA-1542 does this :-(
>
>: So
>: dump [0-9]auf /dev/nrst[0-9] /filesystem
>: if your dump data large then 4GB (multitape dump) failed.
>:
>: However, value of B option for Travan TR-4 unknown for me :-(
>
> I've been using B 4000000 and that seems to work, but I don't have a
> file system that forces a multiple tape dump. The TR-4 tape drives
> are 4G, which likely means 4000000000 bytes, more or less. B 4000000
> gives 4096000000 bytes. If you wanted to specify 4000000000 bytes, a
> B of 3906250 would do the trick. dd if=/dev/zero of=/dev/tape
> bs=<size used for dump> will tell you too, but you may need to convert
> the number reported into 1024 byte units.
Thank you
>
> Warner
With best wishes
Oleg V. Naumann
P.S. Sorry, I'm not in -questions, so please Cc: for me any postings
in this thread.
Oleg
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