Date: Thu, 10 Sep 1998 02:37:02 -0600 From: Warner Losh <imp@village.org> To: "Oleg V. Naumann" <oleg@reis.zp.ua> Cc: "Chad R. Larson" <chad@freebie.dcfinc.com>, questions@FreeBSD.ORG Subject: Re: SCSI tape drives Message-ID: <199809100837.CAA02460@harmony.village.org> In-Reply-To: Your message of "Thu, 10 Sep 1998 10:34:47 %2B0300." <XFMail.980910103447.oleg@reis.zp.ua> References: <XFMail.980910103447.oleg@reis.zp.ua>
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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. : 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. Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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