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iSCSI Driver: Release Notes for Cisco iSCSI Drivers, Combined Initial Release

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Release Notes for Cisco SN iSCSI Drivers

Table Of Contents

Release Notes for Cisco SN iSCSI Drivers

Contents

Introduction

System Requirements

Operating System Requirements

Obtaining the iSCSI Driver

Uninstalling iSCSI Driver Software

Open Caveats

iSCSI Driver for Linux Version 1.8.7

iSCSI Driver for Microsoft Windows NT Version 1.8.6

iSCSI Driver for Sun Solaris Version 1.8.8

Related Documentation

Release-Specific Documents

Hardware Documents

Software Documents

Service and Support

Obtaining Documentation

World Wide Web

Documentation CD-ROM

Ordering Documentation

Documentation Feedback

Obtaining Technical Assistance

Cisco.com

Technical Assistance Center

Cisco TAC Web Site

Cisco TAC Escalation Center


Release Notes for Cisco SN iSCSI Drivers


May 9, 2001


Note You can find the most current documentation on Cisco.com. This set of electronic documents may contain updates and modifications made after the hard-copy documents were printed.


These release notes support the initial release of Cisco Storage Networking iSCSI Driver for Linux version 1.8.7, Microsoft Windows NT version 1.8.6, and Sun Solaris version 1.8.8.

For a list of open software caveats that apply to these versions, see the "Open Caveats" section. The caveats are updated for every maintenance version and are located on Cisco.com and the Documentation CD-ROM.

Contents

These Release Notes describe the following topics:

Introduction

System Requirements

Open Caveats

Related Documentation

Service and Support

Obtaining Documentation

Obtaining Technical Assistance

Introduction

A Cisco Storage Networking iSCSI Driver provides a server with the ability to access storage through an IP network. The iSCSI driver uses iSCSI protocol to transport SCSI requests and responses over an IP network between the server and a Cisco SN 5420 Storage Router.

Architecturally, the iSCSI driver combines with the server TCP/IP stack, network drivers, and NICs to provide the same functions as a SCSI adapter driver with a host bus adapter (HBA).

The iSCSI driver provides a transport for SCSI requests and responses for storage devices; however, instead of providing a transport for directly attached devices, the driver transports the SCSI requests and responses between the server and a Cisco SN 5420 Storage Router via an IP network. The SN 5420 Storage Router, in turn, transports SCSI requests and responses between it and the storage devices attached to it.

Once the iSCSI driver is installed, the server will proceed with a discovery process for iSCSI storage devices as follows:


Step 1 The iSCSI driver requests available iSCSI targets from the storage router.

Step 2 The storage router sends available iSCSI target names to the server.

Step 3 The server logs into the iSCSI targets.

Step 4 The storage router accepts the server login and sends target identifiers.

Step 5 The server queries targets for device information.

Step 6 Targets respond with device information.

Step 7 The server creates table of internal devices.


The Cisco Storage Networking iSCSI drivers provide the following target and LUN support:

The iSCSI driver for Linux provides IP access to a maximum of eight remote SCSI targets, with each target capable of supporting 32 LUNs.

The iSCSI driver for Microsoft Windows NT provides IP access to a maximum of eight remote SCSI targets, with each target capable of supporting eight LUNs.

The iSCSI driver for Sun Solaris provides IP access to a maximum of eight remote SCSI targets, with each target capable of supporting 32 LUNs.

Remote SCSI targets can be accessed through one or more storage routers up to a maximum of eight storage routers.


Note The iSCSI protocol is an IETF-defined protocol for IP storage (ips). For more information about the iSCSI protocol, refer to the IETF standards for IP storage at http://www.ietf.org.


System Requirements

This section describes the system requirements for the Cisco Storage Networking iSCSI Drivers and includes the following information:

Operating System Requirements

Obtaining the iSCSI Driver

Uninstalling iSCSI Driver Software

Operating System Requirements

The Cisco Storage Networking iSCSI Drivers require the following operating system environments:

The iSCSI Driver for Linux requires a Linux kernel version 2.2.16-3 or higher. The iSCSI Driver for Linux supports single-processor machines only; it cannot be run on multiprocessor machines.

The iSCSI Driver for Microsoft Windows NT requires Microsoft Windows NT Server (or Workstation) version 4.0 with service pack 6a or later. The iSCSI Driver for Microsoft Windows NT supports single-processor and multiprocessor machines. For multiprocessor machines the driver supports up to four processors.

The iSCSI Driver for Sun Solaris runs only on SPARC machines, and requires Solaris version 7 or 8 with all Sun-recommended patches installed for the version being used. The iSCSI Driver for Sun Solaris supports single-processor and multiprocessor machines. For multiprocessor machines the driver supports up to four processors.

See the readme file for the appropriate driver for additional information.


Note The Cisco Storage Networking iSCSI Driver for Microsoft Windows NT will not work with computers running Microsoft Windows 2000.


Obtaining the iSCSI Driver

To obtain the Cisco Storage Networking iSCSI drivers, accompanying readme files, and example configuration files, log in to Cisco.com and access the following URL:

http://www.cisco.com/cgi-bin/tablebuild.pl/sn5420

In addition, you can check this website for information about the availability of new drivers, updated drivers, driver compatibility, and other relevant information.


Note This URL is subject to change without notice. If it changes, log in to Cisco.com (CCO) and click Software Center at Service & Support. At Software Center, click Storage Networking Software.


Uninstalling iSCSI Driver Software

The readme file for each Cisco Storage Networking iSCSI Driver contains complete instructions for removing the iSCSI driver software.

Open Caveats

This section describes possibly unexpected behavior by Cisco Storage Networking iSCSI Driver software. All the caveats listed in this section are open. They consist of severity 1 and 2 caveats, and selected caveats of other severity levels. Caveats are listed according to driver.

For a more complete list of caveats against these versions, access Cisco.com as described in the section "Cisco.com" at the end of this document.


Note If you have an account with Cisco.com, you can use Bug Navigator II to find caveats of any severity for any release. You can reach Bug Navigator II on Cisco.com at Service & Support: http://www.cisco.com/pcgi-bin/Support/Bugtool/launch_bugtool.pl.


iSCSI Driver for Linux Version 1.8.7

The iSCSI driver for Linux version 1.8.7 has no open severity 1 or 2 caveats.

iSCSI Driver for Microsoft Windows NT Version 1.8.6

CSCdt82378

This problem occurs when a Microsoft Windows NT server is attached to LSI RAID via a Cisco SN 5420 Storage Router, and the server has both the iSCSI and RDAC drivers installed. RDAC is LSI's dual path failover driver. When the server is running both drivers, the NT Disk Administrator will see redundant paths to each LSI RAID disk when the Windows NT server is rebooted.

Workaround: Use LSI's "hot_add" utility to save boot information, instead of using the iSCSI driver's "save boot info" button. Perform the following steps:


Step 1 Clear boot information using the iSCSI Control Panel applet.

Step 2 Reboot the Windows NT host.

Step 3 Run LSI's "hot_add" utility.

Step 4 Run LSI's "SM7devices" utility and verify that the correct number of disks appear, as well as 2 UTM (access) LUNs. If no disks appear, run the "hot_add" utility again. If redundant disks appear, return to Step 1 and repeat this procedure.

Step 5 Run Windows NT Disk Administrator and assign drive letters to the LSI disks.


iSCSI Driver for Sun Solaris Version 1.8.8

The iSCSI driver for Sun Solaris version 1.8.8 has no open severity 1 or 2 caveats.

Related Documentation

The following sections describe the related documentation available for the Cisco Storage Networking iSCSI Driver for Linux version 1.8.7, Microsoft Windows NT version 1.8.6, Sun Solaris version 1.8.8, and the Cisco SN 5420 Storage Router. These documents consist of the iSCSI driver release notes, readme and example configuration files, and the storage router hardware installation and software configuration guides.

The iSCSI driver readme files and example configuration files are available in electronic format, as part of the software download package. See the "Obtaining the iSCSI Driver" section for details. The storage router hardware installation and software configuration documentation sets are available as printed manuals or electronic documents.

Release-Specific Documents

This Release Notes document is the only document specific to Cisco Storage Networking iSCSI Driver for Linux version 1.8.7, Microsoft Windows NT version 1.8.6, and Sun Solaris version 1.8.8. It is located on Cisco.com and the Documentation CD-ROM.

Each release of storage router software includes an associated Release Notes document, which is also available as an electronic document on Cisco.com and the Documentation CD-ROM.

Hardware Documents

Refer to the Cisco SN 5420 Storage Router Hardware Installation Guide for storage router hardware installation procedures. This document is available as a printed manual. It is also available as an electronic document on Cisco.com and the Documentation CD-ROM.

Software Documents

Refer to the Cisco SN 5420 Storage Router Software Configuration Guide for storage router software configuration information and procedures. This document is available as a printed manual. It is also available as an electronic document on Cisco.com and the Documentation CD-ROM.

For documentation on the storage router web-based GUI, refer to the SN 5420 Storage Router web-based GUI online Help system.

Service and Support

For service and support for a product purchased from a reseller, contact the reseller, who offers a wide variety of Cisco service and support programs described in "Service and Support" of Cisco Information Packet shipped with your product.


Note If you purchased your product from a reseller, you can access Cisco.com as a guest. Cisco.com is Cisco Systems' primary real-time support channel. Your reseller offers programs that include direct access to Cisco.com services.


For service and support for a product purchased directly from Cisco, use Cisco.com.

Obtaining Documentation

The following sections explain how to obtain documentation from Cisco Systems.

World Wide Web

You can access the most current Cisco documentation on the World Wide Web at the following URL:

http://www.cisco.com

Translated documentation is available at the following URL:

http://www.cisco.com/public/countries_languages.shtml

Documentation CD-ROM

Cisco documentation and additional literature are available in a Cisco Documentation CD-ROM package, which is shipped with your product. The Documentation CD-ROM is updated monthly and may be more current than printed documentation. The CD-ROM package is available as a single unit or through an annual subscription.

Ordering Documentation

Cisco documentation is available in the following ways:

Registered Cisco Direct Customers can order Cisco product documentation from the Networking Products MarketPlace:

http://www.cisco.com/cgi-bin/order/order_root.pl

Registered Cisco.com users can order the Documentation CD-ROM through the online Subscription Store:

http://www.cisco.com/go/subscription

Nonregistered Cisco.com users can order documentation through a local account representative by calling Cisco corporate headquarters (California, USA) at 408 526-7208 or, elsewhere in North America, by calling 800 553-NETS (6387).

Documentation Feedback

If you are reading Cisco product documentation on Cisco.com, you can submit technical comments electronically. Click Leave Feedback at the bottom of the Cisco Documentation home page. After you complete the form, print it out and fax it to Cisco at 408 527-0730.

You can e-mail your comments to bug-doc@cisco.com.

To submit your comments by mail, use the response card behind the front cover of your document, or write to the following address:

Cisco Systems
Attn: Document Resource Connection
170 West Tasman Drive
San Jose, CA 95134-9883

We appreciate your comments.

Obtaining Technical Assistance

Cisco provides Cisco.com as a starting point for all technical assistance. Customers and partners can obtain documentation, troubleshooting tips, and sample configurations from online tools by using the Cisco Technical Assistance Center (TAC) Web Site. Cisco.com registered users have complete access to the technical support resources on the Cisco TAC Web Site.

Cisco.com

Cisco.com is the foundation of a suite of interactive, networked services that provides immediate, open access to Cisco information, networking solutions, services, programs, and resources at any time, from anywhere in the world.

Cisco.com is a highly integrated Internet application and a powerful, easy-to-use tool that provides a broad range of features and services to help you to

Streamline business processes and improve productivity

Resolve technical issues with online support

Download and test software packages

Order Cisco learning materials and merchandise

Register for online skill assessment, training, and certification programs

You can self-register on Cisco.com to obtain customized information and service. To access Cisco.com, go to the following URL:

http://www.cisco.com

Technical Assistance Center

The Cisco TAC is available to all customers who need technical assistance with a Cisco product, technology, or solution. Two types of support are available through the Cisco TAC: the Cisco TAC Web Site and the Cisco TAC Escalation Center.

Inquiries to Cisco TAC are categorized according to the urgency of the issue:

Priority level 4 (P4)—You need information or assistance concerning Cisco product capabilities, product installation, or basic product configuration.

Priority level 3 (P3)—Your network performance is degraded. Network functionality is noticeably impaired, but most business operations continue.

Priority level 2 (P2)—Your production network is severely degraded, affecting significant aspects of business operations. No workaround is available.

Priority level 1 (P1)—Your production network is down, and a critical impact to business operations will occur if service is not restored quickly. No workaround is available.

Which Cisco TAC resource you choose is based on the priority of the problem and the conditions of service contracts, when applicable.

Cisco TAC Web Site

The Cisco TAC Web Site allows you to resolve P3 and P4 issues yourself, saving both cost and time. The site provides around-the-clock access to online tools, knowledge bases, and software. To access the Cisco TAC Web Site, go to the following URL:

http://www.cisco.com/tac

All customers, partners, and resellers who have a valid Cisco services contract have complete access to the technical support resources on the Cisco TAC Web Site. The Cisco TAC Web Site requires a Cisco.com login ID and password. If you have a valid service contract but do not have a login ID or password, go to the following URL to register:

http://www.cisco.com/register/

If you cannot resolve your technical issues by using the Cisco TAC Web Site, and you are a Cisco.com registered user, you can open a case online by using the TAC Case Open tool at the following URL:

http://www.cisco.com/tac/caseopen

If you have Internet access, it is recommended that you open P3 and P4 cases through the Cisco TAC Web Site.

Cisco TAC Escalation Center

The Cisco TAC Escalation Center addresses issues that are classified as priority level 1 or priority level 2; these classifications are assigned when severe network degradation significantly impacts business operations. When you contact the TAC Escalation Center with a P1 or P2 problem, a Cisco TAC engineer will automatically open a case.

To obtain a directory of toll-free Cisco TAC telephone numbers for your country, go to the following URL:

http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml

Before calling, please check with your network operations center to determine the level of Cisco support services to which your company is entitled; for example, SMARTnet, SMARTnet Onsite, or Network Supported Accounts (NSA). In addition, please have available your service agreement number and your product serial number.