Date: Mon, 9 Sep 2002 13:34:28 -0400 From: Charles Peterman <cjp@sandstorm.net> To: hackers@freebsd.org Subject: DVD-RAM: multi-session writing Message-ID: <200209091334.28200.cjp@sandstorm.net>
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FreeBSD 4.5. Hitachi DVD-RAM drive I have to support writing files to a DVD-RAM in a Windows compatible mode= =2E Normally I would treat the thing as a slow HD and read and write at my=20 leisure, but Windows does not play nicely with UFS. So I came upon the=20 solution of writing an ISO image out to the disk, like so: readcd dev=3D$DVDRAM_SCSI_ID -w f=3Dimage.iso. Now this works and is portable, but it has an unfortunate side effect. If= I=20 attempt to write another image out, I overwrite the existing data. =20 So, there are three possible solutions: 1. Move to UDF, (works for me, but management is scared of anything label= led a=20 "kernel change") 2. Figure out some way to get the first sector after the last ISO from th= e=20 disk, and start writing the new data there. (I checked camtools and read= cd=20 and came up with nothing.) 3. Make a new ISO with all of the old and the new data, write that out to= =20 disk. (A bit resource intense, but it should work.) The question for you is whether I was thorough enough evaluating method 2= =2E Is=20 there some way to find out the last sector used on a SCSI device from the= =20 command line? If not, is there some way to roll my own? Thx, Charles To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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