D-Link DNS-340L User Manual - Page 432
RAID 1, one 80GB drive your largest Raid 5 volume can not exceed 240GB. In
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Section 5 - Knowledge Base RAID 1 Mirrors the hard drives for redundancy. Because the data is stored on multiple disks, RAID 1 provides fault tolerance and protection, in addition to performance advantages. If one hard drive fails, the other still has all of the data. Replace the failed hard drive and it will re-mirror, restoring maximum data protection. RAID 5 Raid 5 combines space from three of your hard drives and uses the fourth drive as a parity drive. Your Raid 5 volume can only be as large as three times your smallest drive. For example, when using one 500GB, two 250GB and one 80GB drive your largest Raid 5 volume can not exceed 240GB. In the event that one of your hard drives fails, the fourth parity drive will be used to rebuild your Raid. RAID 10 Is an array of striped mirrored RAIDS. First multiple RAID 1 mirrors are created and RAID 0 stripes are created over these. D-Link ShareCenter DNS-340L User Manual 430
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