I noticed that the technical notes also mentioned - 'An HFS Plus volume is not required to have an HFS wrapper. In that case, the volume will start at the first sector of the disk, and the volume header will be at sector 2. However, Apple software currently initializes all HFS Plus volumes with an HFS wrapper.'
Mark Day wrote : 'Since the Mac OS ROM only knows how to boot from HFS volumes, having an embedded HFS Plus volume means I can boot from it directly, rather than having to partition my disk with an HFS boot volume and an HFS Plus volume for all my data.'
Simon Bazley wrote: 'You can create a HFS+ volume without the HFSWrapper if you like, but old macs will just erase the disk for you if they encounter it. Hence all new Macs use HFS Wrappers.'
Going by the above statements could I conclude that if I want to create a non-bootable volume (a HFS/HFS+ CD-ROM to be specific) I don't need to consider using an embedded volume at all?
I have a couple of questions to what Simon wrote - If my external HFS+ volume happens to be on a CD-ROM which is in any case a one-time writable medium, how could older macs 'erase' the disk? I guess that probably happens to CD-RW's which can be formatted or erased..... or did you mean something else ?
And if I do have a wrapper on a HFS+ volume and insert it into an older Mac, it would anyway not be readable though it doesn't get erased, right ?
Regards, Nandini Hengen