From owner-freebsd-questions Thu Sep 10 01:37:46 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id BAA25128 for freebsd-questions-outgoing; Thu, 10 Sep 1998 01:37:46 -0700 (PDT) (envelope-from owner-freebsd-questions@FreeBSD.ORG) Received: from rover.village.org (rover.village.org [204.144.255.49]) by hub.freebsd.org (8.8.8/8.8.8) with SMTP id BAA25123 for ; Thu, 10 Sep 1998 01:37:44 -0700 (PDT) (envelope-from imp@village.org) Received: from harmony [10.0.0.6] by rover.village.org with esmtp (Exim 1.71 #1) id 0zH2E8-0005r1-00; Thu, 10 Sep 1998 02:37:16 -0600 Received: from harmony.village.org (localhost.village.org [127.0.0.1]) by harmony.village.org (8.9.1/8.8.3) with ESMTP id CAA02460; Thu, 10 Sep 1998 02:37:02 -0600 (MDT) Message-Id: <199809100837.CAA02460@harmony.village.org> To: "Oleg V. Naumann" Subject: Re: SCSI tape drives Cc: "Chad R. Larson" , questions@FreeBSD.ORG In-reply-to: Your message of "Thu, 10 Sep 1998 10:34:47 +0300." References: Date: Thu, 10 Sep 1998 02:37:02 -0600 From: Warner Losh Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG In message "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= 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