Table Of Contents
Release Notes for Cisco iSCSI Driver Version 4.1.2 for Microsoft Windows
May 26, 2004
These release notes support Cisco iSCSI Driver version 4.1.2 for Microsoft Windows. The iSCSI driver version 4.1.2 supersedes version3.1.2; there is no Cisco iSCSI Driver version 4.1.1 for Microsoft Windows.
For a list of software caveats that apply to version4.1.2, 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 provides an IP host with the ability to access storage through an IP network. The iSCSI driver uses the iSCSI protocol to transport SCSI requests and responses over an IP network between the IP host and a Cisco SN 5400 or MDS 9000 Series system.
Architecturally, the iSCSI driver combines with the IP host's TCP/IP stack, network drivers, and network interface cards (NICs) to provide the same functions as a SCSI or a Fibre Channel 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 or MDS 9000 Series system via an IP network. The SN 5400 or MDS 9000 Series system, in turn, transports SCSI requests and responses between it and the storage devices attached to it.
Once the iSCSI driver is installed and started, the host proceeds with a discovery process for storage devices.
A more technical description of the driver's design and its features can be found in the readme file that accompanies the iSCSI driver in the downloaded driver archive file.
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 4.1.2 and includes the following information:
Operating System Requirements
•The driver requires either Microsoft Windows XP Professional with service pack 1 or later, Microsoft Windows Server 2003 (no service packs are required), or Microsoft Windows 2000 Professional, Advanced Server or Datacenter Server with service pack 3 or later. Hotfix Q839635 is required for all operating systems.
If the iSCSI Driver is running on a Microsoft Windows 2000 Advanced Server Cluster node, Microsoft Hotfix Q307939 is also required.
These hotfixes do not appear on the Microsoft Hotfix website; you must specifically request them.
Contact Microsoft Product Support Services to obtain the hotfixes. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft website: http://support.microsoft.com/default/aspx?scid=fn;EN-US;CNTACTMS.
Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The typical support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
Request the hotfixes for the specific Knowledge Base (KB) article (307939 and 839635). 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 hotfixes. The e-mail message will also contain a password that you will be prompted to enter when you open the hotfix files.
For additional information about these hotfixes, access the Microsoft website at http://www.microsoft.com and follow the support link to view KB article 307939 and 839635.
•The driver supports single-processor and multiprocessor machines.
•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.
SN 5400 Series System Software Requirements
The iSCSI Driver version 4.1.2 for Microsoft Windows is interoperable with a Cisco SN 5400 Series system running software release 3.2 or later. This version of the driver is not interoperable with a Cisco SN 5400 Series system running software release 2.5 or earlier.
MDS 9000 Series System Software Requirements
The iSCSI Driver version 4.1.2 for Microsoft Windows is interoperable with a Cisco MDS 9000 Series system running SAN-OS Release 1.1(1) or later.
This section describes how to obtain iSCSI driver software and upgrade an existing iSCSI driver installation, and includes the following information:
Downloading the iSCSI Driver
Registered Cisco.com users can download the most current Cisco iSCSI drivers, readme files and release notes from Cisco.com. In addition, information about driver compatibility and other relevant driver information is available on Cisco.com. You can access software and related information by following these instructions:
Step 1 At http://www.cisco.com, log in to Cisco.com. Click Technical Support and Software Center.
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 with detailed information about the download file and Cisco's Software License Agreement. Follow the instructions on that and any subsequent web pages to download the software.
Step 5 To install and configure storage router software, see the appropriate storage router 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.
Installing, Upgrading and Uninstalling iSCSI Driver Software
For complete procedures to install and configure, upgrade, or uninstall iSCSI driver software, refer to the readme file that accompanies the iSCSI driver (in the downloaded driver archive file).
New and Changed Information
•Enhanced configuration and administration utility—Running as a Microsoft Management Console application, the Cisco iSCSI Initiator Configuration program provides easy access to iSCSI driver configuration options.
•Performance monitoring feature—Allows you to view a variety of performance data, including per target and per session statistics.
•Target portal failover—Enables the iSCSI driver to attempt to connect to a target using the next available IP address if an existing target connection fails. A "preferred portal" can also be specified.
•Multipath I/O software support—Allows third-party multipath I/O software applications to be used in conjunction with the iSCSI driver.
•Configuration changes can be made to the iSCSI driver without having to stop it or without having to reboot the system.
See the readme file for additional information about all new features.
Using the iSCSI Driver with Cisco Network Boot
The iSCSI driver version 4.1.2 supports Cisco Network Boot, a product that allows you to initiate a boot of a computer without an attached disk drive. Cisco Network Boot supports a boot of the following Microsoft Windows operating systems:
•Microsoft Windows 2000 (Server or Advanced Server) with service pack 3
•Microsoft Windows XP (Professional Edition) with service pack 1
•Microsoft Windows Server 2003 (Enterprise, Standard or Web Edition)
With Cisco Network Boot, a computer without a directly attached disk drive uses iSCSI protocol via an iSCSI driver to boot from an iSCSI disk through an IP network and a Cisco SN 5400 Series system.
For more information on Cisco Network Boot, refer to the Cisco Network Boot Installation and Configuration Guide and the associated release notes document. These documents are available as electronic document on Cisco.com and the Documentation CD-ROM.
Using the iSCSI Driver with Microsoft Windows Server 2003
The iSCSI driver version 4.1.2 running on Microsoft Windows Server 2003 creates a pseudo disk drive. This pseudo disk drive appears as an "unknown disk" under the Disk Management MMC application.
The "unknown disk" can be safely ignored, because it is required for the proper functioning of the iSCSI driver. It does not affect the performance or functioning of the system in any way. Do not attempt to delete this device! Deleting the device causes the Cisco iSCSI driver to stop working.
You can disable the pseudo disk device. This will alter operation of the initiator.
For more information about running the iSCSI driver on Microsoft Windows Server 2003, refer to the readme file that accompanies the iSCSI driver (in the downloaded driver archive file).
Caveats describe unexpected behavior or defects in the specified version of the driver. Severity 1 caveats are the most serious caveats; severity 2 caveats are less serious.
There are no open or resolved severity 1 or 2 caveats for the iSCSI driver version 4.1.2 for Microsoft Windows.
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:
Cisco iSCSI driver troubleshooting information is available on the Cisco.com web site.
You can access troubleshooting information by following these instructions:
Step 1 At http://www.cisco.com, log in to Cisco.com. Click Products & Solutions, and select Storage Networking and SN 5400 Series Storage Routers from the menu.
Step 2 At the Cisco SN 5400 Series Storage Routers web page, click Technical Documentation.
Step 3 At the Technical Documentation web page, click the Tech Notes link.
Step 4 At the Tech Notes page, click the appropriate link for your iSCSI driver.
You can access iSCSI driver FAQs by following these instructions:
Step 1 At http://www.cisco.com, log in to Cisco.com. Click Products & Solutions, and select Storage Networking and SN 5400 Series Storage Routers from the menu.
Step 2 At the Cisco SN 5400 Series Storage Routers web page, click Product Literature.
Step 3 At the Product Literature web page, click the Q&A link.
Step 4 At the Q&A page, click the appropriate link for your iSCSI driver.
The following sections describe the related documentation available for the iSCSI Driver version 4.1.2 for Microsoft Windows. These documents consist of the iSCSI driver release notes and readme file.
This Release Notes document and the readme file are the only documents specific to iSCSI Driver version 4.1.2 for Microsoft Windows. The release notes document is located on Cisco.com and the Documentation CD-ROM. The iSCSI driver readme file is available in electronic format, as part of the software download package. See the "Downloading the iSCSI Driver" section for details.
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This document is to be used in conjunction with the documents listed in the "Related Documentation" section.
Copyright © 2004 Cisco Systems, Inc. All rights reserved.