3Ware 7006-2 Installation Guide - Page 21

3ware Escalade ATA RAID Controller Installation Guide Determining your configuration Hint: The capacity of each drive is limited to the capacity of the smallest drive in the array. The total array capacity is defined as follows: RAID 0: (the number of drives) X (the capacity of the smallest drive) RAID 1: the capacity of the smallest drive RAID 5: (the number of drives - 1) X (capacity of the smallest drive) RAID10: (the number of drives / 2) X (capacity of smallest drive) Navigate to the Create Array button after selecting all the drives for the array. Hit Enter to bring up the Create Disk Array display (see Figure 8 and Figure 9 for examples). Check that the proper drives are listed. Create Disk Array Note: Creating an array will overwrite existing data on its drives. Create a disk array from these drives: Port 0 - QUANTUM FIREBALLP LM30 Port 1 - QUANTUM FIREBALLP LM30 30.0GB 30.0GB Select RAID Configuration: Array's Write Cache State: OK Stripe (RAID 0) enable Stripe Size: Cancel 64 KB 128KB 256KB 512KB 1mb Alt-F1 Help Previous/Next Enter Change Value Esc Cancel Figure 8. Create Disk Array Display, RAID 0 Example 30 www.3ware.com 3ware Disk Array Configuration Utility Create Disk Array Note: Creating an array will overwrite existing data on its drives. Create a disk array from these drives: Port 1 - IBM-DTLA-387815 Port 2 - IBM-DTLA-387815 Port 3 - IBM-DTLA-387815 512 M 512 M 512 M Select RAID Configuration: Array's Write Cache State: RAID 5 enable Stripe Size: 64 KB OK Cancel Alt-F1 Help Previous/Next Enter Change Value Esc Cancel Figure 9. Create Disk Array Display, RAID 5 Example Select RAID configuration The Escalade ATA RAID Controller gives you a choice of four RAID configurations. Select one. • Stripe (RAID 0): maximizes performance and capacity through a process called striping. High performance arrays write portions of a single file across multiple drives. There is no fault tolerance. • Mirror (RAID 1): duplicates or "mirrors" the data on both drives. No data will be lost if one of the drives fails. • RAID 10: combines mirroring and striping, providing both fault tolerance and high performance. RAID 10 arrays require a minimum of four drives. Configurations consist of 4, 6, 8, 10 or 12 drives. • RAID 5: combines parity data and striping, providing fault tolerance, high capacity and high storage efficiency. The parity data is distributed across all drives, rather than being concentrated on www.3ware.com 31