StorageTek StorageNet SCSI-3 User manual

Brand: StorageTek

Model: StorageNet SCSI-3

Type: User manual

This manual is also suitable for

8946121402

StorageNet Fibre Channel Switch 4000

SES (SCSI-3 Enclosure Services)

User Guide

8946121402

StorageNet Fibre Channel Switch 4000

SES (SCSI-3 Enclosure Services)

User Guide

ii 8946121402

Revision History

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exported.

Address comments concerning this manual to:

StorageTek

Technical Communications

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Always include the complete publication number and title of the document with your

comments.

Tab Level/Date Description

01 (08/98) Initial release.

02 (03/99) Manual release corresponding to Release 1.6a.

8946121402 iii

About This Document

Introduction

Use this guide for monitoring, conﬁguring, and maintaining a StorageNet Fibre Channel

Switch 4000 through SCSI-3 Enclosure Services (SES). You should be knowledgeable about

networking in general, routing and bridging in particular. A clearly deﬁned network and

security plan is necessary. Your security plan should assess the possible risks to your network

and deﬁne access policies to deal with those risks.

How This Guide is Organized

This guide is divided into the following chapters:

• Chapter 1 “Product Overview”, provides an overview of SES and SES Management.

• Chapter 2 “SES Concepts”, describes the concepts associated with SES.

• Chapter 3 “SES Commands”, describes FC-PH constructs, FCP and SES commands,

and diagnostics pages.

• Chapter 4 “Troubleshooting”, describes command error messages.

The following appendix is also included in this guide:

• Appendix A “Glossary”.

Reference Documents

The following documents contain information related to SES:

Fibre Channel Standards. For detailed information on the Fibre Channel standards, see the

Fibre Channel Association web site at http://www.ﬁbrechannel.com.

StorageNet Fibre Channel Switch 4000 Installation and Reference Guide (8946119902)

StorageNet Fibre Channel Switch 4000 WEB TOOLS User Guide (8946121602)

StorageNet Fibre Channel Switch 4000 ZONING User Guide (8946121502)

iv 8946121402

Notice to the Reader

The material contained in this publication is for informational purposes only and is subject to

change without notice. StorageTek is not responsible for the use of any product options or

features not described in this publication, and assumes no responsibility for any errors that

may appear in this publication. Refer to the revision history (at the beginning of this

document) to determine the revision level of this publication.

StorageTek does not by publication of the descriptions and technical documentation contained

herein, grant a license to make, have made, use, sell, sublicense, or lease any equipment or

programs designed or constructed in accordance with this document or programs designed or

constructed in accordance with this information.

Customer Support

For technical support, please call StorageTek at 1-800-248-8777.

Before calling StorageTek, please have your information from the Problem Reporting form

ready. This form is located at the back of this manual.

If a problem cannot be resolved through Customer Support, a Return Material Authorization

(

RMA) is issued. Instructions are provided on where to return the part and how to receive a

replacement part. If the product is installed by the customer, the customer is responsible for

returning the product with freight paid to the nearest repair center.

8946121402 v

Table of Contents

Chapter 1 Product Overview

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1

SES Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1

Chapter 2 SES Concepts

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1

SES Functional Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1

Access to the Enclosure Services Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3

Access Through an Enclosure Services Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3

Indicators and Control Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3

Chapter 3 SES Commands

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

Constructs, Commands and Diagnostic Pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

FCP Constructs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2

FCP Command Information Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2

FCP Transfer Ready Information Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3

FCP Data Information Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3

FCP Response Information Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3

FCP and SES Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4

Switch Diagnostics Pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5

Supported Diagnostics Pages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5

Switch Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6

Sensor Table Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7

Fabric Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7

Neighborhood Table Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8

Fibre Channel Port Table Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8

Name Server Local Table Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10

Inquiry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11

Receive Diagnostic Results. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-13

Report LUNs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14

Request Sense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14

Send Diagnostic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15

Test Unit Ready . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15

Reject. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-16

vi 8946121402

Chapter 4 Troubleshooting

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1

License Reject. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1

CHECK CONDITION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1

Invalid Field Errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1

Appendix A Glossary

8946121402 vii

List of Figures

Figure 1-1 SES Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2

Figure 2-1 SES Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1

Figure 2-2 SES Functional Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2

viii 8946121402

8946121402 ix

List of Tables

Table 1-1 Example LUN Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2

Table 2-1 Format of LUN recognized by SESD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2

Table 2-2 LUN Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2

Table 3-1 Constructs, Commands and Diagnostic Pages . . . . . . . . . . . . . . . . . . . . .3-1

Table 3-2 FCP Information Unit Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2

Table 3-3 FCP_CMND IU Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3

Table 3-4 FCP_RSP Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3

Table 3-5 FCP_STATUS Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4

Table 3-6 Supported Operation Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4

Table 3-7 Diagnostics Pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5

Table 3-8 Switch MIB Groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5

Table 3-9 Page Code 0 Format – Supported Diagnostic Pages . . . . . . . . . . . . . . . .3-5

Table 3-10 Switch Page Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6

Table 3-11 Sensor Table Page Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7

Table 3-12 Format of Fabric Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7

Table 3-13 Neighborhood Table Page Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8

Table 3-14 Fibre Channel Port Table Page Format . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9

Table 3-15 Format of Name Server Local Table Page . . . . . . . . . . . . . . . . . . . . . . . .3-10

Table 3-16 Inquiry Command Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11

Table 3-17 Inquiry Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11

Table 3-18 Page Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12

Table 3-19 SESD Return Codes for 00h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12

Table 3-20 SESD Return Codes for 80h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12

Table 3-21 SESD Return Codes for 83h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-13

Table 3-22 Receive Diagnostic Results Command Format . . . . . . . . . . . . . . . . . . . . .3-13

Table 3-23 Report LUNs Command Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14

Table 3-24 Reported LUNs Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14

Table 3-25 Request Sense Command Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14

Table 3-26 Send Diagnostic Command Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15

Table 3-27 Test Unit Ready Command Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15

Table 3-28 Reject Command Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-16

x 8946121402

8946121402 1-1

Chapter 1 Product Overview

Introduction

This chapter describes StorageTek’s implementation of SES (SCSI-3 Enclosure Services) on

the StorageNet Fibre Channel Switch 4000.

SES implementation in a SCSI-3-based Host Adapter is up to the adapter manufacturer and

StorageTek cannot determine their implementation. Therefore, the focus of this guide is to

discuss StorageTek’s implementation of SES within the Fabric.

Note: Currently, the SES standard is in DRAFT status and is subject to change. See

“Reference Documents” for a pointer to the SES Standards Committee’s web site.

SES Management

SES is an in-band mechanism for managing devices, such as switches, within a Fabric or other

enclosures. SES commands are used to manage and sense the operational status of the power

supplies, cooling devices, displays, indicators, individual drives, and other non-SCSI elements

installed in a switch (enclosure). The command set uses the SCSI

SEND DIAGNOSTIC and

RECEIVE DIAGNOSTIC RESULTS commands to obtain/set conﬁguration information from

the switch.

SES allows a SCSI entity (or initiator) to communicate with a switch through a standard Fiber

Channel Protocol (FCP) connection into the Fabric. The beneﬁts are:

• SES does not require supporting another protocol

• SES does not require an additional network link (such as Ethernet)

Figure 1-1 shows the Fabric SES view. The switch’s Domain_ID is used as the Logical Unit

Number (LUN) address to identify each switch including the switch used for access through

SES. See the “SES Functional Model” section in Chapter 2 for more information.

Note: The connection to the Fabric is through the switch labeled LUN5 and which is also

called LUN0. The connection to the well known management address (FFFFFAh) is

always labeled LUN0 no matter which switch is used.

SES Management

1-2 8946121402

Figure 1-1 SES Overview

LUN addressing within the Fabric can be non-sequential because it is based on the switch’s

Domain_ID. Table 1-1 shows the sample LUN mapping used with Figure 1-1.

Figure 1-1 shows that the switch in the lower left hand corner is assigned both LUN5 and

LUN0. (LUN5 because the switch’s

Domain_ID is 5 and LUN0 because the client is

physically connected to that switch.) LUN values for the ﬁrst byte, shown in Table 1-1, are:

•

00000000 00000000 - the bold characters indicate the local switch

•

0X0X0000 00000000 - the bold characters indicate the SCSI LUN address of the other

switches in the Fabric

Table 1-1 Example LUN Mapping

Domain ID Unique LUN Value (in Hex)

5 00000000 00000000 (Note that Domain ID 5 is used for both LUN 0 and 5)

2 01020000 00000000

5 01050000 00000000

6 01060000 00000000

9 01090000 00000000

10 010A0000 00000000

SES Management

8946121402 1-3

Therefore, if there are 5 switches in the Fabric SES reports 6 LUNs, one LUN value for each

switch and LUN0 for the local client connection.

Other SCSI-3 enclosures can also run SES outside the Fabric, such as JBODs, RAID-5 arrays,

SCSI-3 hard drives, and SCSI-3 tape drives. These devices are identiﬁed by their Fabric and

SCSI addresses, and are assigned LUNs using standard SCSI-3 host adapter LUN addressing.

Note: It is not this guide’s intent to describe the environment outside of the Fabric.

SES Management

1-4 8946121402

8946121402 2-1

Chapter 2 SES Concepts

Introduction

This chapter uses generic terms to describe enclosure services and speciﬁc SES

implementation. SES instances can be distributed inside and outside of the Fabric to any

enclosure capable of supporting enclosure services through an SES device.

SES is distributed transparently throughout the Fabric, with an instance of a distributed SES

Device (SESD) on each switch as shown in Figure 2-1.

Figure 2-1 SES Distribution

SES Functional Model

Each instance may be accessed by an SES Application Client by specifying the associated

unique LUN. See Figure 2-2 for information on LUN addressing. SES implementation also

provides an SES Application Client an in-band mechanism for managing any Fabric switch

that it is attached to.

Figure 2-2 shows the SES functional model.

SES Functional Model

2-2 8946121402

Figure 2-2 SES Functional Model

At the Fibre Channel level, each SESD is accessible through the Fibre Channel well known

address,

FFFFFAh (Management Server). At the SCSI-3 level, it is associated with a LUN. An

SES Application Client can refer to any distributed SESD within the Fabric using its LUN. A

LUN value of 0 is always associated with the local switch that is physically attached to the

SES Application Client. The unique LUN value is mapped based on peripheral device

addressing.

The bus number for each switch is set to

010000b as shown in Table 2-1. The ﬁrst byte of the

Target/LUN is set using the

Domain_ID of the switch. Bytes 2..7 are set to zero.

Table 2-2 shows the LUN mapping.

Table 2-1 Format of LUN recognized by SESD

Byte/Bit 7 6 5 4 3 2 1 0

0 0 0 Bus Number = 010000b

1 Target

... or

7 Logical Unit Number (LUN)

Table 2-2 LUN Mapping

Domain ID Unique LUN Value (in Hex)

0 0h 01000000 00000000

5 5h 01050000 00000000

12 Ch 010C0000 00000000

15 Eh 010F0000 00000000

25 19h 01190000 00000000

SES Application

Client

FCP Port

FC-PH

SES Device

FCP _Port

FC-PH

FCP Command

FCP Response

SES Response

SES Request

Response Sequence

Request Sequence

Access to the Enclosure Services Process

8946121402 2-3

An SES Application Client may easily ﬁnd the LUN values of all distributed SESDs inside the

Fabric by using the Report LUNs command. See the “Report LUNs” section in Chapter 3 for

more information.

Access to the Enclosure Services Process

An application client can monitor all enclosures capable of processing the enclosure services

command set with SES instances distributed throughout a Storage Area Network (SAN).

Enclosure services can monitor both devices inside and outside of the enclosure, such as an

Uninterruptable Power Supply (UPS). However, SES pertains only to SES instances inside the

Fabric.

An application client connects through Fiber Channel Protocol (FCP) using the Management

Service address (

FFFFAh) to any switch through its LUN. See Figure 1-1. The enclosure

services command set uses the

RECEIVE DIAGNOSTIC RESULTS and SEND DIAGNOSTIC

commands to any device capable of supporting SES.

Access Through an Enclosure Services Device

The Application Client requests information from the SESD to examine status and warning

information from the switch.

An Application Client through FCP calls the enclosure services process running on any switch

as a LUN that has SES enabled. The SESD sets the enclosure services bit (

EncServ) in the

INQUIRY command to indicate that it can transport enclosure services information. See the

“Inquiry” section in Chapter 3 for more information.

Indicators and Control Management

SESD is accessed through an application client that uses the SEND DIAGNOSTIC command to

transport control information to the enclosure services process. The control information may

include operations to perform or to modify its operating mode. The application client uses the

RECEIVE DIAGNOSTIC RESULTS command with the PF bit set to obtain enclosure status.

The information returned indicates the actual enclosure state. See the “Receive Diagnostic

Results” section in Chapter 3 for more information.

Note: The instructions from the application client may be ignored or overwritten by the

enclosure service processor to ensure proper state information. For example, the

enclosure may ignore an instruction to clear an error condition because the condition

is valid or because the instruction is not supported by the enclosure.

Indicators and Control Management

2-4 8946121402

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