Rosewill R2-RAID user manual 125GB 250GB

Server RAID System [ R2-RAID ] User Manual

RAID / SAFE50：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 reduces the cost of additional hard drives in operations where non-critical data could be lost without severe consequences. 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 SAFE50 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-half of the size of one hard drive (if they are equal) or one-half 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	Drive B
			750GB
125GB	250GB	125GB

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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