Adaptec 2268300R manual Introduction to SAS

	Contents	● 10
A	Introduction to SAS
	Terminology Used in This Chapter	89
	What is SAS?	89
	How Do SAS Devices Communicate?	90
	What’s a Phy?	90
	What’s a SAS Port?	91
	What’s a SAS Address?	91
	What’s a SAS Connector?	91
	What do SAS Cables Look Like?	91
	How are Disk Drives Identified in SAS?	92
	What are the SAS Connection Options?	92
	Direct-attach Connections	92
	Backplane Connections	92
	SAS Expander Connections	93
	How is SAS Different from Parallel SCSI?	94
B	Understanding RAID
	Understanding Drive Segments	96
	Non-redundant Arrays (RAID 0)	96
	RAID 1 Arrays	97
	RAID 1 Enhanced Arrays	97
	RAID 10 Arrays	98
	RAID 5 Arrays	99
	RAID 5EE Arrays	100
	RAID 50 Arrays	101
	RAID 6 Arrays	102
	RAID 60 Arrays	102
	Selecting the Best RAID Level	103
C Using the Adaptec RAID Configuration Utility
	Introduction to the ARC Utility	105
	Running the ARC Utility	105
	Navigating the ARC Utility	105
	Using the ACU to Create and Manage Arrays	105
	Creating a New Array	105
	Managing Existing Arrays	106
	Initializing Disk Drives	108
	Rescanning Disk Drives	108
	Secure Erasing Disk Drives	108
	Managing Global Hot Spares	108
	Using the ACU to Create and Manage JBODs	109
	Creating a New JBOD	109
	Managing Existing JBODs	109
	Using the ACU to Manage the maxCache Pool	109
	Using SerialSelect to Modify Controller Settings	110