Providing two modes for your system- Mode 1: expanding two ATA and two SATA devices without RAID construction to your system. Mode 2: construct RAID 0/1/0+1. In each mode, you can select booting from HD connecting to motherboard or RC-212 (if you want to install a new system from HD connecting to RC-212, you need a floppy drive to process the installation).
* HDD Controllers are capable to support all HDD sizes, but different OS may limited the HDD sizes that can be supported. For example, XP 32-bit supports only up to 2TB.
* This Model supports Optical Drive (Both IDE and SATA CD/DVD-ROM including Blu-ray drives.)
* Please avoid using "Green" drives to build the RAID. These types of drives have slower spin up time and tend to enter power saving mode aggressively. The RAID controller would assume the drives as either dropped or damaged because of time out, and the whole RAID set will become degraded or even unusable.