Table Of Contents
Release Notes for Cisco iSCSI Driver for Microsoft Windows NT Version 2.1.2
May 24, 2002
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 Cisco iSCSI Driver for Microsoft Windows NT version 2.1.2.
For a list of software caveats that apply to version 2.1.2, see the "Caveats" section. The caveats are updated for every maintenance version and are located on Cisco.com and the Documentation CD-ROM.
These Release Notes describe the following topics:
The iSCSI Driver for Microsoft Windows NT provides an IP host 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 host and a Cisco SN 5400 Series system.
Architecturally, the iSCSI driver combines with the host 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 IP host and a Cisco SN 5400 Series system via an IP network. The SN 5400 Series system, in turn, transports SCSI requests and responses between it and the storage devices attached to it.
Once the iSCSI driver is installed, the IP host will proceed with a discovery process for iSCSI storage devices as follows:
Step 1 The iSCSI driver requests available iSCSI targets from the SN 5400 Series system.
Step 2 The SN 5400 Series system sends available iSCSI target names to the IP host.
Step 3 The IP host logs into the iSCSI targets.
Step 4 The SN 5400 Series system accepts the IP host login and sends target identifiers.
Step 5 The IP host queries targets for device information.
Step 6 Targets respond with device information.
Step 7 The IP host creates a table of internal devices.
The iSCSI Driver for Microsoft Windows NT provides IP access to a maximum of eight remote SCSI targets, with each target capable of supporting 255 LUNs. Remote SCSI targets can be accessed through one or more SN 5400 Series systems up to a maximum of eight SN 5400 Series systems.
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.
This section describes the system requirements for version 2.1.2 and includes the following information:
Operating System Requirements
•The iSCSI Driver for Microsoft Windows NT requires Microsoft Windows NT Server (or Workstation) version 4.0 with service pack 6a or later and Microsoft hotfix Q319420. This hotfix does not appear on the Microsoft hotfix website; you must specifically request it.
Note If you are running Microsoft Windows NT Server or Workstation version 4.0 without a service pack or with a service pack less than 6a, you must upgrade to service pack 6a and apply Microsoft hotfix Q319420.
To obtain the hotfix, call Microsoft customer support at 1-800-936-4900 (or any Microsoft customer support phone number) and request the hotfix for Knowledge Base (KB) article Q319420. You will be asked to supply an e-mail address. You will receive an e-mail message with a link to an FTP site where you can download the hotfix. The e-mail message will also contain a password that you will be prompted to enter when you open the hotfix file.
For additional information about the hotfix, access the Microsoft website at http://www.microsoft.com and follow the support link to view KB article Q319420.
•The iSCSI Driver for Microsoft Windows NT can be run on the Japanese language-version of Microsoft Windows NT Server or Workstation. The required version, service pack and hotfix information is the same as previously described.
•The iSCSI Driver for Microsoft Windows NT supports multiple processors, and may be run on up to four multiprocessors.
•To ensure the best performance for iSCSI drivers, the extended windowing feature of TCP should be enabled on all IP hosts connecting to the SN 5400 Series system. In general, a larger window size enhances SN 5400 Series system performance.
•The receive and transmit flow control feature of the Gigabit Ethernet driver should be enabled on all IP hosts connecting to the SN 5400 Series system.
•If you are using a 3Com Gigabit Ethernet Server network interface card, the minimum supported revision level is "B" (3C985B-SX). Using a card with a lower revision level will decrease performance.
Note This driver will not work with computers running Microsoft Windows 2000.
SN 5400 Series System Software Requirements
The iSCSI Driver for Microsoft Windows NT version 2.1.2 can connect to a Cisco SN 5400 Series system running software release 2.1.1 or later; this driver cannot connect to a Cisco SN 5420 Storage Router running software release 1.1.x.
Obtaining the iSCSI Driver and Updated SN 5400 Series System Software
From time to time, Cisco releases updated versions of SN 5400 Series system software and iSCSI drivers. Updated versions of SN 5400 Series system software and the Cisco iSCSI drivers, accompanying readme files, release notes and example configuration file are available for download.
If you are a registered Cisco.com user, you can download SN 5400 Series system software and iSCSI drivers. If you are a non-registered Cisco.com user, you can download only iSCSI drivers.
You can access software by following these instructions:
Step 2 At the Software Center web page, under Software Products & Downloads, click Storage Networking Software.
Step 3 At the Storage Networking Software web page, click the appropriate link for your software.
Step 4 At the software download web page, click the file that you want to download. Another software download web page will be displayed. Follow the instructions on that and any subsequent web pages to download the software.
Step 5 To install and configure SN 5400 Series system software, see the appropriate SN 5400 Series system software configuration guide and release notes. To install and configure an iSCSI driver, see the readme file that accompanies the iSCSI driver (in the downloaded driver archive file) and the appropriate release notes.
Determining the iSCSI Driver Version
To determine the version of the iSCSI driver software installed on the IP host, open Control Panel and double-click the iSCSI Config icon. The lower left corner of the dialog box shows the version number of the iSCSI Config program and the title bar shows the operating system it is intended for. Click Status to show the version information of the iSCSI driver on the top line.
You can also verify version information by checking the file versions of these files:
Follow these steps:
Step 1 Use Windows Explorer to navigate to the c:\winnt\system32\drivers directory.
Step 2 Right-click the file iscsi.sys and then click Properties from the shortcut menu. The Properties dialog box displays.
Step 3 Click the Version tab, and check the File version.
Step 4 Navigate to the c:\winnt\system32\ directory.
Step 5 Right-click the file iscsicfg.cpl and then click Properties from the shortcut menu. The Properties dialog box displays.
Step 6 Click the Version tab, and check the File version. The file version information should be the same in both files.
Upgrading to a New Version
If you are installing the iSCSI driver software from a floppy disk or a CD-ROM, be sure that the driver files are in the root directory. If you are installing the iSCSI driver software from a hard drive, the files can be located in a directory anywhere on the hard drive.
To upgrade to a new version of iSCSI driver software, login to the system as a user with Administrator privileges and follow these instructions:
Step 1 Open Control Panel and double-click the SCSI Adapters icon. The SCSI Adapters dialog box opens.
Step 2 Close Control Panel. Control Panel must be closed to ensure that all the driver files will be appropriately updated. If Control Panel is open during the remaining steps in the upgrade process, certain driver files cannot be correctly updated.
Step 3 At the SCSI Adapters dialog box, click the Drivers tab.
Step 4 Click Add.
Step 5 At the Install Driver dialog box, click Have Disk. The Install From Disk dialog box opens.
Step 6 At the Install From Disk dialog box, select the source location for the driver files from the Copy manufacturer's file from list and click OK. Clicking OK opens another Install Driver dialog box.
Step 7 At the Install Driver dialog box opened in the previous step, select Iscsi Driver and click OK.
Note If you are installing a new version of the driver over an existing one, and you are not certain that Control Panel was closed in Step 2, you must manually copy the newer version of the iscsicfg.cpl file from the installation source to the c:\winnt\system32 directory. If you manually copy the newer version of the iscsicfg.cpl file over the older one, make sure that Control Panel is closed.
See the readme file for additional information about upgrading to a new version of iSCSI driver software.
Uninstalling iSCSI Driver Software
To uninstall iSCSI driver software, login to the system as a user with Administrator privileges and follow these instructions:
Step 1 Open Control Panel and double-click the SCSI Adapters icon. The SCSI Adapters dialog box opens.
Step 2 Click the Drivers tab and select the iSCSI driver (Iscsi Driver).
Step 3 Click Remove and OK.
Step 4 Restart the computer. If you want to reinstall the driver after removing it, you must restart the server first.
Caveats describe unexpected behavior or defects in iSCSI software versions. Severity 1 caveats are the most serious caveats; severity 2 caveats are less serious.
•The "Open Caveats" section describes open severity 1 and 2 caveats that apply to the current version and may apply to previous versions.
•The "Resolved Caveats" section describes severity 1 and 2 caveats resolved in this version, but open in previous versions.
Within the sections, the caveats are sorted alphanumerically by caveat number.
Note If you have an account with Cisco.com, you can use Bug Navigator II to find caveats of any severity for any version. You can reach Bug Navigator II on Cisco.com at Service & Support:
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 the LSI "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 the LSI "hot_add" utility.
Step 4 Run the LSI "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.
There are no resolved severity 1 or 2 caveats for the iSCSI Driver for Microsoft Windows NT version 2.1.2.
The following sections describe the related documentation available for the iSCSI Driver for Windows NT version 2.1.2 and the Cisco SN 5400 Series systems. These documents consist of the iSCSI driver release notes, readme and example configuration files, and the SN 5400 Series system hardware installation and software configuration guides.
The SN 5400 Series system hardware installation and software configuration documentation sets are available as printed manuals or electronic documents. The iSCSI driver readme file and example configuration file are available in electronic format, as part of the software download package. See the "Obtaining the iSCSI Driver and Updated SN 5400 Series System Software" section for details.
This Release Notes document is the only document specific to iSCSI Driver for Microsoft Windows NT version 2.1.2. It is located on Cisco.com and the Documentation CD-ROM.
Each release of SN 5400 Series system software includes an associated Release Notes document, which is also available as an electronic document on Cisco.com and the Documentation CD-ROM.
Refer to the appropriate SN 5400 Series system hardware installation guide for hardware installation procedures. The Cisco SN 5420 Storage Router Hardware Installation Guide provides hardware installation procedures for SN 5420 Storage Routers. The Cisco SN 5428 Storage Router Hardware Installation Guide provides hardware installation procedures for SN 5428 Storage Routers. These documents are available as printed manuals. They are also available as electronic documents on Cisco.com and the Documentation CD-ROM
Refer to the appropriate SN 5400 Series system software configuration guide for software configuration information. The Cisco SN 5420 Storage Router Software Configuration Guide Release 2.1 provides configuration information for SN 5420 Storage Routers. The Cisco SN 5428 Storage Router Software Configuration Guide Release 2.2 provides configuration information for SN 5428 Storage Routers. These documents are available as printed manuals. They are also available as electronic documents on Cisco.com and the Documentation CD-ROM.
For documentation on the SN 5400 Series system web-based GUI, refer to the SN 5400 Series system 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.
Software Configuration Tips on the Cisco TAC Home Page
A variety of Cisco SN 5400 Series system software and iSCSI driver installation, configuration and usage tips are available on the Cisco Technical Assistance Center (TAC) Web Site.
For example, you can access Cisco SN 5420 "tech tips" by following these instructions:
Step 2 At the Cisco Routers web page, under Cisco SN 5420 Storage Router Software, click Product Support.
Step 3 At the Cisco SN 5420 Storage Router Product Support web page, click the appropriate links for additional information about installing and configuring SN 5400 Series system software and iSCSI drivers.
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:
Translated documentation is available at the following URL:
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.
Cisco documentation is available in the following ways:
•Registered Cisco Direct Customers can order Cisco product documentation from the Networking Products MarketPlace:
•Registered Cisco.com users can order the Documentation CD-ROM through the online Subscription Store:
•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).
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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 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:
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:
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:
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:
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:
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.
This document is to be used in conjunction with the documents listed in the "Related Documentation" section.
Copyright © 2002, Cisco Systems, Inc.
All rights reserved.