Adaptec 3405 User Guide - Page 85
RAID 10 Arrays
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Appendix B: Understanding RAID ● 85 RAID 10 Arrays A RAID 10 array is built from two or more equal-sized RAID 1 arrays. Data in a RAID 10 array is both striped and mirrored. Mirroring provides data protection, and striping improves performance. Drive segment size is limited to the size of the smallest disk drive in the array. For instance, an array with two 250 GB disk drives and two 400 GB disk drives can create two mirrored drive segments of 250 GB, for a total of 500 GB for the array, as shown in this figure. Disk Drive 1 250 GB Drive Segment Size (Smallest Disk Drive) Disk Drive 2 250 GB Disk Drive 3 400 GB Disk Drive 4 400 GB Disk Drives in Logical Drive Disk Drive 1 1 3 ... 499 Disk Drive 2 2 4 ... 500 Disk Drive 3 1 3 ... 499 Unused Space = 150 GB Disk Drive 4 2 4 ... 500 Unused Space = 150 GB RAID 10 Logical Drive = 500 GB
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