Date: Sat, 06 Nov 2004 01:32:54 +0100 From: Palle Girgensohn <girgen@pingpong.net> To: freebsd-scsi@freebsd.org Subject: how "reformat" DLT IV tape from 20/40 to 40/80? Message-ID: <4501DBD4728A1FD2B7595244@rambutan.pingpong.net>
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Hi! Just got a new taper, an HP DLT VS80. We previously had an Adic, 20/40. The use the same type of tapes, DLT IV. Now, I want to keep using some of the old tapes, but the HP won't write to them, and I believe that is because they are just 20/40 GB, not 40/80 GB. I found some info saying that the first time a tape is used, the taper writes info about the density (or sets the density somehow). I use FreeBSD, so I expect mt(1) should somehow be able to perform the trick. Some tapers seem to have a button for switching density, but this machine doesn't. Odd thing is, "mt stat" always returns 0x41 density, which is 40 GB. Both for new and old tapes: Mode Density Blocksize bpi Compression Current: 0x41:DLTapeIV(40GB) variable 98250 IDRC ---------available modes--------- 0: 0x41:DLTapeIV(40GB) variable 98250 IDRC 1: 0x41:DLTapeIV(40GB) variable 98250 IDRC 2: 0x41:DLTapeIV(40GB) variable 98250 IDRC 3: 0x41:DLTapeIV(40GB) variable 98250 IDRC --------------------------------- Current Driver State: at rest. --------------------------------- File Number: 0 Record Number: 0 Residual Count 0 Any ideas how to fix this? Thanks! Palle
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