This idea arises since IDE hard disk nowadays are becoming bigger and cheaper. My plan is to use an existing P4 512MB PC and install SATA IDE 160 GB mirroring (with SATA RAID 1 Card) and use instead of buying External SDLT Tape 110/220 drive with 10 Tape cartridges and Veritas Backup exec 9. I can add couple more 160 GB on IDE ports for added redundancy or disregard the RAID and slot-in 3 160 GB hdd. Can anybody advice the pros and the cons, cost and performance? Thanks in advance for the input.