IBM RS/6000 manual Finding the Physical Location of a Device, Available

Finding the Physical Location of a Device

The physical location of a device (for example, a disk drive module or adapter) cannot be reported directly by the using system because of t which the SSA interface works. The address of an SSA device is related t position of that device on the SSA loop. The address can, therefore, cha configuration is changed.

Finding the Device When Service Aids Are Available

To help you to find the correct physical disk drive, the SSA service ai identify function. This function, when selected, causes the check light of disk drive module to flash. For more details, see “SSA Service Aids” on pag

Some devices (for example, adapters) do not have								check lights.	To find	su
device,	you	can either			use	the	identify function	to identify	devices	t
SSA adapter		on	the SSA	link, or		use	the procedure	described in	“Finding	th
When No	Service		Aids	Are	Available.”

Finding

the

Device

When

No

Service

Aids

Are

Available

When

no

service

aids

are

available,

you

must

find the device by using

and

SSA-address (AA) values

that are

provided

by

some service

request

numb

(SRNs). Examples of these SRNs

are

43nnn, 44nnn,

and

45nnn,

where

nnn repres-

ents

the

PAA

values.

The

port

(P)

value

can

be

a

number

from

0

to

3,

which

indicates the

po

on the

SSA adapter:

0

=

Connector

A1

1

=

Connector

A2

2

=

Connector

B1

3

=

Connector

B2

The AA value is the decimal SSA-address value. It indicates the position o device that you are trying toalongfindthe(countedSSA link).

Use

the

port

value

to

locate

the

relevant connector

on

the SSA adapter,

the

SSA cable

to

the

first

disk drive module or adapter in the same SSA

not

include

dummy

disk

drive

modules.

The

first

disk

drive

module

or

adapter

that

you reach

represents

SSA-add

0. Continue

to follow the

SSA

link

from

disk

drive

module

or

adapter,

increas

7-54RS/6000 Enterprise Server Model H Series User's Guide