You misunderstood me

I know the blank option and have used it and cdrecord returns no error on my suspicious CD-RW.

What I want to ask is do I need to blank a CD-RW before I can burn it again.

As for using it as floppy, I mean can make a file system on it(ext2/fat?) and mount it and use it in commands like cp etc.

In Window, I can just drag and drop(and delete) whatever I want on it.

cdrecord to me seems like a once off burning program rather than the tools I want.