CDRECORD or DVDwrite, which one is better?
It depends on! Both have their strengths.
DVDwrite only produces DATA-CD/DVD (mode 1), because this is the only format OpenVMS can handle for data.
Which filesystem is the best CD in an multi-platform environment?
OpenVMS uses three filesystems: ODS2, ODS5 and ISO9660. A PC-CD
uses long filenames whereas OpenVMS only handles them in 8.3 file
If you want to preserve all OpenVMS file attributes, zip your OpenVMS directory tree with "-V" or produce a backup-saveset. Use 8.3 names here
(i.e. DATA1.ZIP or MYFILES2.BCK)! Put this single file into a ISO9660-container file with mkisofs and burn this container file.
Howto copy DATA-CD/DVD?
DVDwrite does it in one step:
$ mount/foreign <source-device>
$ dvdwrite /write <source-device> <target-device>
In case of using CDRECORD you have to copy the contents of your source into a scratch-file.