Adaptec 1045 User Guide - Page 53

Chapter A: Introduction to SAS

l 53

SAS controller port options vary. A SAS controller with four phys could be configured with one

wide port, with two wide ports that comprise two phys, or with four narrow ports each

containing one phy. (A wide port with four phys is referred to as a

4-wide

or

4x

port.)

What’s a SAS Address?

Each SAS port is identified with a unique SAS address, which is shared by all phys on that port.

For example, a SAS disk drive might have two narrow ports. Each port has one unique SAS

address. The single phy in each port uses its port’s SAS address.

In another example, a SAS device might have one 4-wide port. That port has one SAS address,

which is shared by all four phys in the port.

Unlike SCSI devices and SCSI IDs, SAS devices self-configure their SAS addresses. User

intervention is not required to set SAS addresses, and SAS addresses cannot be modified.

What’s a SAS Connector?

A SAS or mini-SAS connector is the physical plug or receptacle that you see on a SAS device. It

supports the power and signal line cable. It’s what you plug a SAS cable into, or the end of the

SAS cable that’s being plugged in.

A connector is what forms physical links between phys. Some SAS connectors can support

multiple links. The number of links a SAS connector can support is referred to as its

width

.

Narrow

connectors support a single link;

wide

connectors support up to four links.

A single SAS device may have one or more connectors. You can use a single SAS connector to

inter-link more than two SAS devices. For example, in the figure on

page 52

, the 4-wide

internal SAS connector forms links with four independent disk drives.

Mini-SAS connectors support both internal and external SAS connections. The mini-SAS

connectors are smaller than the standard SAS internal and external connectors. Mini-SAS

connectors support single and multilinks with the ability to scale to future speed needs.

What do SAS Cables Look Like?

Internal SAS cables are narrower than internal parallel SCSI cables. The connectors vary in size

depending on the number of links they support, from single link connectors to 4-wide (or

larger) connectors. Internal fan-out cables let you connect four disk drives to a single 4-wide

connector.

For an example of some internal SAS or mini-SAS cables and an external SAS cable, see

Selecting Disk Drives and Cables

on page 19

.

How are Disk Drives Identified in SAS?

In the BIOS and in the management utilities, disk drives are identified with numbers in this

format:

XX:YY:ZZ

where

XX

is the disk drive count number,

YY

is the enclosure number, and

ZZ

is the slot

number (within the enclosure). If the disk drive is not installed in an enclosure, a double

dashes (--) appear instead of

YY

and

ZZ

(for instance, 01:--:--).

Section	Page
Contents	6
About This Guide	9
What You Need to Know Before You Begin	10
Terminology Used in this Guide	10
How to Find More Information	10
About SATA/SAS Controllers	11
SATA/SAS Controller Features	12
About the Adaptec SATA/SAS 1405 Controller	13
About the Adaptec SATA/SAS 1045 Controller	14
Package Contents and System Requirements	15
Package Contents	16
System Requirements	16
Installing the SATA/SAS Controller and Disk Drives	17
Before You Begin	18
Installing the SATA/SAS Controller	18
Selecting Disk Drives and Cables	19
Disk Drives	19
Cables	19
Connecting Devices to SATA/SAS Controllers	20
Connecting Disk Drives Directly to the SATA/SAS Controller	20
Connecting to a Backplane	21
Connecting to a DVD-ROM	22
Connecting to a SAS Expander	22
Connecting to SATA/SAS Tape Drives	22
Checking Your Controller and Devices	23
Setting the Boot Controller	23
Installing the Driver and an Operating System	24
Before You Begin	25
Creating a Driver Disk	25
Installing with Windows	25
Installing with Red Hat Enterprise Linux	26
Installing with SUSE Linux Enterprise Server	26
Installing the Driver on an Existing Operating System	27
Before You Begin	28
Creating a Driver Disk	28
Installing on Windows XP or Windows 2003	28
Installing on Windows Vista or Windows Server 2008	29
Installing on Red Hat or SUSE Linux Enterprise Server	29
Configuring the Controller Utility	30
Using the Adaptec Configuration Utility	31
Starting Adaptec Configuration Utility	31
Exiting Configuration Utility	31
Using the Controller Configuration Utility	31
Viewing the Controller Properties	32
Setting the Controller Configuration	33
Viewing the PHY Configuration	34
Using the Disk Utilities	35
To access the Disk Utilities	35
Enclosure Management Support	38
Connecting Drive LED Control Cables	39
Behavioral Pattern of Drive LED	39
Solving Problems	41
Troubleshooting Checklist	42
Using the Adaptec Flash Utility for DOS	43
Introduction	44
System Requirements	44
Compatibility Information	44
Before You Begin	44
Obtaining the BIOS Kit	44
Creating the BIOS Kit on Floppy Disks	44
Running the AFU	45
Running the Menu-Based AFU	45
Running the AFU from the Command Line	45
AFU Commands	45
Updating Flash Using AFU Command Line	49
Introduction to SAS	50
Terminology Used in This Appendix	51
What is SAS?	51
How do SAS Devices Communicate?	52
What’s a Phy?	52
What’s a SAS Port?	52
What’s a SAS Address?	53
What’s a SAS Connector?	53
What do SAS Cables Look Like?	53
How are Disk Drives Identified in SAS?	53
What are the SAS Connection Options?	54
Direct-Attach Connections	54
Backplane Connections	54
SAS Expander Connections	54
How is SAS Different from Parallel SCSI?	55
SAS Controller LED and I2C and SGPIO Connector Reference	57
Adaptec 1045 LED Connector Specification	58
Adaptec 1405 LED and I2C and SGPIO Connector Specification	58
Adaptec 1405 I2C Connector Specification	59
Safety Information	60
Electrostatic Discharge (ESD)	60
Technical Specifications	61
Environmental Specifications	62
DC Power Requirements	62
Glossary	63

Adaptec 1045 User Guide - Page 53

What’s a SAS Address?, What’s a SAS Connector?, What do SAS Cables Look Like?

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