Date: Sun, 14 Jul 2002 21:52:22 +0930 From: "Rob" <listone@deathbeforedecaf.net> To: <freebsd-questions@freebsd.org> Subject: FFS on CD-ROM - can it be done? Message-ID: <004a01c22b31$1b706da0$a4b826cb@goo>
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Wise Ones, I'm trying to put a FFS filesystem on CD-ROM. My current attempt builds a virtual filesystem with vnconfig + disklabel + newfs, then writes the image file using burncd. I end up with something that half works - df and fsdb can see the filesystem, but ffsinfo and mount can't. # mount -r /dev/acd1c /mnt mount: /dev/acd1c on /mnt: incorrect super block # df -h /dev/acd1c Filesystem Size Used Avail Capacity Mounted on /dev/acd1c 678M 256M 368M 41% # ffsinfo /dev/acd1c ffsinfo: partition is unavailable # fsdb -r /dev/acd1c ** /dev/acd1c (NO WRITE) CANNOT READ: BLK 2048 CONTINUE? yes THE FOLLOWING DISK SECTORS COULD NOT BE READ: Examining file system `/dev/acd1c' Last Mounted on /var/spool/cdrom-images/mount current inode: directory I=2 MODE=40755 SIZE=512 MTIME=Jul 6 16:17:23 2002 [0 nsec] CTIME=Jul 6 16:17:23 2002 [0 nsec] ATIME=Jul 6 16:23:36 2002 [0 nsec] OWNER=root GRP=wheel LINKCNT=5 FLAGS=0 BLKCNT=2 GEN=baec144 fsdb (inum: 2)> q An exchange on the NetBSD/Sparc list a couple of years ago[1] mentioned that their CD-ROM driver doesn't actually read the disklabel but returns a hardcoded ISO layout. On the other hand, Solaris CDs can be partitioned like normal disks (the Software CD has 1 UFS slice and several HSFS slices). Does FreeBSD support non-standard CD layouts? Thanks for the help Rob. [1] http://www.netsys.com/netbsd-port-sparc/1999/04/msg00080.html -- Trust the Computer. The Computer is your friend. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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