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Supported iSCSI Initiators

Application Notes

July 2003

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Summary of content (12 pages)

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Supported iSCSI Initiators Application Notes July 2003 All trademark names are the property of their respective companies. This publication contains opinions of StoneFly Networks, which are subject to change from time to time. This publication is copyright  2003 by StoneFly Networks, Inc. and is intended for use only by recipients authorized by StoneFly Networks.
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Last Updated on 7/28/03 Supported iSCSI Initiators Table of Contents Introduction........................................................................................ 3 Initiator Types .................................................................................... 3 SNICs and HBAs ................................................................................................... 3 Software Driver and NIC ........................................................................................
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Last Updated on 7/28/03 Supported iSCSI Initiators Introduction The StoneFly Networks Storage Concentrator is the interface between hosts and storage devices in an IP network. IP-based storage area networks (IP SANs) use the iSCSI protocol over an Ethernet and TCP/IP network. Each server, host, or user that wants to access the storage devices must also implement the iSCSI protocol over an Ethernet and TCP/IP network.
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Last Updated on 7/28/03 Supported iSCSI Initiators This solution normally has higher CPU utilization than the SNIC approach. Benchmark tests show throughput similar to a SNIC when there is no other processing on the server and plenty of CPU cycles are available. In actual use, throughput will not be as good or the other applications or database programs will respond more slowly.
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Last Updated on 7/28/03 Supported iSCSI Initiators 2. The Intel Storage Adapter iSCSI initiator performs discovery for its targets by issuing a “send targets” command. If the Storage Concentrator has been preconfigured to assign volumes to the host, the Intel Storage Adapter iSCSI initiator will discover the volumes. If no volumes are discovered, the Intel Storage Adapter iSCSI initiator will not automatically reissue its discovery command.
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Last Updated on 7/28/03 • Supported iSCSI Initiators The /etc/iscsi.conf file requests an entry for each target and LUN to be used by the iSCSI initiator. This provides easy control of the target/LUN list. However, the iSCSI initiator accepts all target/LUN combinations presented to it, so to gain ultimate flexibility with the Storage Concentrator do not specify any target or LUN combinations.
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Last Updated on 7/28/03 Supported iSCSI Initiators Note: Novell 6.5 will include the iSCSI driver as part of the OS distribution, which will be on CD. Novell 6.5 is targeted for General Availability on Aug. 15, 2003. Novell iSCSI Initiator Server Requirements • NetWare 5.1 requires Service Pack 5 installed on all servers that will run iSCSI initiator software. • NetWare 6 requires Service Pack 3 installed on all servers that will run iSCSI initiator software. • Netware 6.
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Last Updated on 7/28/03 Supported iSCSI Initiators You can do this either at the server console or remotely by using NetWare Remote Manager to access the server console. 2. On the NetWare Remote Manager main screen, click the iSCSI Services link at the bottom of the left column. 3. Click Add Target and enter the IP address of the iSCSI target device (storage router) that is connected to the shared storage system. Each target device can have multiple targets.
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Last Updated on 7/28/03 Supported iSCSI Initiators 4) Occasional slow performance and/or dropped iSCSI connection problems have been experienced with certain router, switch, and hub configurations. These network configurations may require that SACK (Selective ACK) be turned off for the TCP/IP stack running on the initiator.
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Last Updated on 7/28/03 • Supported iSCSI Initiators The format command will then request information on geometry for the "other" drive you have selected. o Enter the number of data cylinders = (512 * n) - where n = number of GbE for the volume o Enter the default for "alternate data cylinders" = 2 o Enter the number of heads = 64 o Enter the number of sectors = 64 o Enter the drive rpm = slowest drive in volumes rpm (enter 7200) o Enter the defaults for all other values • • • Next partition the drive.
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Last Updated on 7/28/03 Supported iSCSI Initiators provide a backup network connection. In the case of hub or switch port, cable, or adapter failure, the computer maintains uninterrupted network performance. Installing Intel® PROSet Software Intel PROSet enables you to test and configure Intel network adapters. You can install Intel PROSet on computers running Windows 2000, Windows XP, and Windows Server 2003. You must have administrative rights on the computer where you are installing the software.
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Last Updated on 7/28/03 Supported iSCSI Initiators 1. In the Network Component Tree, right-click a non-teamed adapter. 2. Click Add to Team, then Create New Team. The Teaming Wizard appears. 3. Select Adaptive Load Balancing and click Next. 4. If you are creating an Adaptive Load Balancing team, you can choose to either enable or disable Receive Load Balancing (RLB). Note: If you enable RLB, team members capable of the highest speed receive IP traffic, and the primary adapter receives non-IP traffic.