Archiving Data Permanently

[Reuben D. Budiardja]

Hello,
I'm wondering if people could give me suggestion about the most economical 
ways to archive data more permanently. Often time we want to clean up some 
harddrive from machines in our offices, and we want to archive the data first 
before we wipe it out, just in case we need them in the future, though 
unlikely. What's the best way to do this in cases like that ? I am talking 
about 20GB - 75GB size data maybe. 

What I've done so far is just tar-bzip2-ed all the files and directory to a 
single .tar.bz2 file. Then I am planning to use 'split' to split it and then 
write them to like CD or DVD, but this could easily takes many discs. Are 
there any other more economical ways ?  

Thank you for any help.

RDB