Adaptec SAS RAID Controllers Instalační příručka stáhnout pdf (Strana 122)

108 Sun StorageTek SAS RAID HBA Installation Guide • March 2010

■ ExpX:PhyX = Expander X is attached to Phy X (see “SAS Expander Connections”

on page 109 below for more information)

where X is the count number.

Note – Devices other than disk drives (CDROM, tape drives, and so on) are listed in

order after your system disk drives.

In parallel SCSI, XX is the disk drive’s channel number, YY is the target number, and

ZZ is the logical unit number (LUN).

About SAS Connection Options

You can connect end devices to each other through direct cable connections and

through backplane connections. When you use one or more expander devices (see

“SAS Expander Connections” on page 109), you can create large configurations.

Direct-Attach Connections

In a direct-attach connection, SAS or SATA disk drives are connected directly to a

SAS card with SAS or mini-SAS cables. One disk drive is attached to one SAS/mini-

SAS connector with one SAS/mini-SAS cable (or multiple disk drives are attached to

one SAS/mini-SAS connector with one fan-out cable).

FIGURE 2-6 shows an example

of direct-attach connections.

The number of direct-attached disk drives is limited to the number of phys supported

by the SAS card. (Note that there may be multiple phys within a single connector. See

“SAS Expander Connections” on page 109.)

Backplane Connections

In a backplane connection, disk drives and SAS cards are attached to and

communicate with each other through a system backplane.

There are two types of backplane connections, passive and active. When connecting to

either backplane, it’s important to properly connect your disk drive LEDs in order to

identify disk drive conditions. See “Component Layout” on page 3 for your RAID

HBA Activity LED connections and locations.

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Adaptec SAS RAID Controllers Instalační příručka Strana 122