From owner-freebsd-questions Fri Jan 26 01:03:13 1996 Return-Path: owner-questions Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id BAA23990 for questions-outgoing; Fri, 26 Jan 1996 01:03:13 -0800 (PST) Received: from relay4.UU.NET (relay4.UU.NET [192.48.96.14]) by freefall.freebsd.org (8.7.3/8.7.3) with ESMTP id BAA23980 for ; Fri, 26 Jan 1996 01:03:09 -0800 (PST) Received: from hnv.com by relay4.UU.NET with SMTP id QQaadw14235; Fri, 26 Jan 1996 04:03:11 -0500 (EST) Message-Id: Date: Fri, 26 Jan 96 03:03:04 CST From: cjk@hnv.com (Chris Kunath) To: freebsd-questions@FreeBSD.org Subject: QIC-150 DATA PROTECT errors Sender: owner-questions@FreeBSD.org Precedence: bulk Have an Archive 2525es (known rogue) 525MB tape drive attached to a generic 486/40 with Adaptec 1542C SCSI running FreeBSD 2.0.5-RELEASE (am saving pennies for 2.1.0...). This drive will let me use QIC-150 tapes if I give a density command: mt -f /dev/rst0 density 0x10 I've been picking up lots of QIC-150 tapes from garage sales, closeouts and the like, and have run into problems with some of the tapes. The particular tapes were evidently commercial software distribution tapes, which I can't write to! When I try, I get these messages: st0(aha0:4:0): DATA PROTECT csi:0,0,80,8 These tapes are not in SAFE mode, and I can detect no differences between the "bad" tapes and the good ones. Is it possible that these tapes have some extra holes burned in them somewhere to write-protect regardless of the position of the "SAFE" write-protect thingie? And does anyone have proper density and tape length parameters for QIC-150 tapes? When I run this dump command: dump 0ubdsf 126 10000 615 /dev/rst0.0 /dev/rwd1s3e to back up my 450 MB /usr filesystem, it takes nine 150 MB tapes! This is a ~1GB filesystem, but there is only around 500MB of data on it -- is the raw device actually making an "image" track-by-track dump of the filesystem? Wondering, cjk@hnv.com