Date: Fri, 26 Jul 1996 15:15:02 +0000 () From: David Brockus <dbrockus@cyberhall.com> To: FreeBSD questions <questions@freebsd.org> Subject: Tape Drive error messages Message-ID: <Pine.BSF.3.91.960726131350.459A-100000@cyber1.cyberhall.com>
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I installed an HP Colorado T4000s tape drive (SCSI-2 TR-4) in a FreeBSD 2.0.5R machine with an Adaptec 2940 controller. I installed the drive in case, configured the kernel, and rebooted. It recognizes the tape drive. I ran 'mt' to check the drive status and got this. cyber1# mt status Present Mode: Density = 0x45 Blocksize = 512 bytes ---------available modes--------- Mode 0: Density = 0x00 Blocksize variable Mode 1: Density = 0x00 Blocksize variable Mode 2: Density = 0x00 Blocksize variable Mode 3: Density = 0x00 Blocksize variable I got the following system error message st0(ahc0:4:0): ILLEGAL REQUEST asc: 24,0 Invalid field in CDB st0: Cannot set selected mode What is CDB? I have obviously missed something, but I am not sure what. I am new to installing/using tape drives on unix systems, so I apologize in advance if this is a stupid question. Is there a device setup file where I specify the density and blocksize for each mode? I have found some technical info about TR-4 media QIC-3095 Number of Tracks: 73 Bit density: 67,733 (docs didn't say if per inch or not) Encoding method: RLL1,7 Length: 270 ft. My problem is what do I do with this information? In the man page for 'mt' that specific bit density is not supported, do I just pick the closest match? Any suggestions would be greatly appreciated. David Brockus
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