IBM 7000 Series, 8000 Series manual Create Disk Array Display, RAID 0 Example

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				30.0GB
Port 1 - QUANTUM FIREBALLP LM30				30.0GB
Select RAID Configuration:		Stripe (RAID 0)
Array's Write Cache State:		enable		Stripe Size:	64 KB
					128KB
					256KB
					512KB
	OK			Cancel	1mb
Alt-F1 Help	Previous/Next		Enter Change Value		Esc Cancel

Figure 8. Create Disk Array Display, RAID 0 Example

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			512	M
Port 2	-	IBM-DTLA-387815			512	M
Port 3	- IBM-DTLA-387815				512	M
Select RAID Configuration:				RAID 5
Array's Write Cache State:			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 toler- ance, high capacity and high storage efficiency. The parity data is distributed across all drives, rather than being concentrated on

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