|First of all the disks are either CDR or CDRW media. A CDrom is a CD reader only (ReadOnlyMedia).|
That said, it is possible to write to a CDR multiple times but it is dependent on the software used to do the writing. In your case you may have finalized the disk. Once that is done then no more data can be written to the disk even if there is space.
I have no idea about the formatting you mention. Sounds like some sort of packet writing format. Windows PCs can do packet writing.
Roxio has Drag to Disk and Nero has InCD.