"Jeremiah Merkl" <[EMAIL PROTECTED]> writes: I guess I'd better take my CDs and my MOD, and visit friends whose Macs still work...
Thank you -- Andre > Just for those who have never seen a multi-session HFS disc before, when you > stick the CD in under a Mac, it actually mounts one volume per session -- 5 > sessions = 5 CD icons appearing on the desktop when you stick it in the drive. > You have to unmount all the icons for the disc to eject. Strange, but it > works. > > Other than that, I can't be any more help. I don't know the specs either. :) > > -JM > > Michael Schmitz wrote: > > > > > mount -t hfs /dev/cdrom should mount the HFS part of the CD. The command > > > > to mount the ISO portion is left as an exercise... > > > > > > > Let me be more precise: I have 5 sessions, and I can mount exactly one > > > HFS partition, and cannot find the other four sessions. fdisk shows no > > > > The other four are also HFS? That's probably not supported. > > > > > partition at all, I guess because it is not designed for CD-ROMs? > > > > [ISO] CD-ROMs have no partition table. The session information is in the > > ISO (or other format) data and the kernel only uses the information on > > the latest session (for CDs where you just add more and more files > > incrementally) if you specify the default device for all I know. > > > > Quoting the source (fs/isofs/inode.c): > > > > static int parse_options(char *options, struct iso9660_options * popt) > > { > > > > if (!strcmp(this_char,"session") && value) { > > > > [...] > > char * vpnt = value; > > unsigned int ivalue = simple_strtoul(vpnt, &vpnt, > > 0); > > if(ivalue < 0 || ivalue >99) return 0; > > popt->session=ivalue+1; > > } > > > > [...] > > > > So there should be a mount option to specify the session to use - > > mount -o session=0 is session 1 and so on. > > > > A bit further, in isofs_get_last_session():0 > > > > [...] > > /* If a minor device was explicitly opened, set session to the > > * minor number. For instance, if /dev/hdc1 is mounted, session > > * 1 on the CD-ROM is selected. CD_PART_MAX gives access to > > * a max of 64 sessions on IDE. SCSI drives must still use > > * the session option to mount. > > */ > > if ((MINOR(dev) % CD_PART_MAX) && (MAJOR(dev) != SCSI_CDROM_MAJOR)) > > session = MINOR(dev) % CD_PART_MAX; > > [...] > > > > Seems like mounting /dev/hdc gives the last session, and mounting > > /dev/hdc2 gives session 2. > > > > Caveat: > > > > * Multisession is legal only with XA disks. > > * A non-XA disk with more than one volume descriptor may do it right, but > > * usually is written in a nowhere standardized "multi-partition" manner. > > * Multisession uses absolute addressing (solely the first frame of the > > whole > > * track is #0), multi-partition uses relative addressing (each first frame > > of > > * each track is #0), and a track is not a session. > > * > > * A broken CDwriter software or drive firmware does not set new standards, > > * at least not if conflicting with the existing ones. > > * > > * [EMAIL PROTECTED] > > > > How does this apply to HFS? Could not find any mention of 'session' in the > > HFS source. The HFS filesystem may not be multisession aware. Good luck > > getting the necessary specs out of Apple or Adaptec. > > > > > What's the role of "the ISO portion" here? > > > > I thought you was talking about a hybrid HFS/ISO CD. That's the only > > 'multisession' CD type I've tried. > > > > Michael