Rosewill R2-RAID user manual Big

Server RAID System [ R2-RAID ] User Manual

RAID / SAFE33：It creates two virtual volumes; one SAFE volume and one BIG volume, and should be used when you need the high reliability for some of your data but you don’t need high reliability for the remainder of your data. It

uses a SAFE volume that is mirrored across two hard drives to protect your critical data in the event a hard drive failure. If one drive fails the SAFE volume is retrievable although the BIG volume is not. When you replace the failed drive, the SAFE volume is automatically rebuilt on to the replacement drive.

When using a SATA host connection, you must have a PM (Port Multiplier) aware host adapter when using SAFE33 on the top level node of a cascaded configuration so that ALL volumes can be detected by the host. If your SATA host adaptor is not PM aware, then ONLY the SAFE volume will be detected and the BIG volume will not be accessible. No such limitation exists when using a USB host connection.

The size of the SAFE volume will be one-third of the size of one hard drive (if they are equal) or one-third of the size of the smaller (if they are not equal.) The size of the BIG volume will be the combination of all remaining capacities.

Safe	Big	Safe	Big
	334GB		834GB
83GB		83GB

HD3206SRD		HD3206SRD
Port 0	Port 1	Port 0	Port 1

Drive A	Drive B	Drive A	Drive B
250GB	250GB	250GB
			750GB

Equal hard drives

Unequal hard drives

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