i'm afraid that a simple "scsi rescan" will not work - there's no such
thing in kernel 2.4 (neither in kernel 2.6, before 2.6.12). we had to
work for a while in order to get a rescan to work, and even then it's
not a general-purpose solution.
What about "cdrecord -scanbus"? Doesn't it do what you described?
--Amos
"Military justice is to justice what military music is to music"