Hello, I've been learning to use pro 06 and did a backup to a cd. I just tried another backup to the same cd and got the message I could not backup to this directory and I needed administrators rights. So what is the best method to backup manually if I just want to overwrite the file. thanks mc
You cannot overwrite a file on a CD. A CD-ROM is a write-once medium. CD-RWs do have the capability to disable an existing file on the media and write a new version - you will eventually exhaust the capacity of the media, though.
Ok, thanks. The cd I'm using is marked cd-r80. Is that why I'm getting the administrator rights window?... mc
Yes, that's why. Your CD-R cannot be re-used. Actually, HeyBub oversimplified.
A CD-ROM really is a "write-ONCE" medium - it can only be written ONCE using professional equipment and cannot be written at all by end users. It's ALREADY been written when you buy it (software, music, etc.) and cannot be used for backing up data.
What HeyBub described is a CD-R that you buy blank and can use ONCE for backup.
As he said, a CD-RW can be re-used. Depending on your "CD-burning software" you *MAY* be able to add new data to a CD-RW in multiple "sessions", or you may be able only to over-write previous data in each session.
getting the
Technically speaking, you can write multiple times to a CD-R disk as long as:
When burning CD-Rs you have the option to close out the cd after burning to it once or 'leaving it open'. Of course, the software you're using to burn the cds also plays into whether you're creating multisession or 'closed' cds by default, but that's a whole nother post.
**Note: some older CDROM drives have problem with multisession CD-Rs.If you're trying to write to the same CD-R you might want to try using a different name to see if that works (If the CD-R hasn't been closed already, you should be fine to write some more to it).
=== === === == An analogy for CDROMs, CD-Rs and CD-RWs goes something like this:
A CDROM is like a book you purchase at the store, printed professionally. You can't change the contents. A CD-R is like a blank journal that you can write inside of with a pen (you can't erase what's already been written but you can always add to the journal until all the pages are used up. (Closing out the session kinda means you tear out all the remaining blank pages. Multi-session means that you just keep writing on new pages until the 'journal' is full.) A CD-RW is like a blank journal that you can write inside of with a pencil, writing, erasing, writing again, erasing again. rinse. repeat.
-Elw00de
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