Adaptec 5325301507 Administration Guide - Page 93
iSCSI Disks - scsi card
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UPC - 753253015740
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Chapter 5 iSCSI Disks Internet SCSI (iSCSI) is a standard that defines the encapsulation of SCSI packets in Transmission Control Protocol (TCP) and their transmission via IP. On SnapServers, an iSCSI disk is based on an expandable, RAID-protected volume, but appears to a client machine as a local SCSI drive. This storage virtualization frees the administrator from the physical limitations of direct-attached storage media and allows capacity to be expanded easily as needed. Unlike standard SnapServer volumes, SnapServer iSCSI disks can be formatted by the iSCSI client to accommodate different application requirements. Connectivity to the iSCSI disk is established using a software package or PCI card, known as an initiator, that must be installed on a client machine. The initiator sees the SnapServer as a "target portal" and an iSCSI disk as a "target." To use the SnapServer as an iSCSI target, you need to configure iSCSI on both the client initiating the iSCSI connection, and on the SnapServer. Use the information presented here in conjunction with the documentation supplied with your initiator to install, configure, and connect the iSCSI initiator(s) to the SnapServer. iSCSI Disk Limitations • The iSCSI protocol limits the size of any iSCSI disk to 2TB. • The GuardianOS can maintain up to 256 iSCSI disks. For Additional Information The following resources provide further information you may need to plan and complete your iSCSI implementation. • SnapServer Online Help: Available from the Storage > iSCSI screen, the online help provides details on creating and managing iSCSI disks on SnapServers. • RFC3720 - Internet Small Computer System Interface (iSCSI): Detailed specification for the iSCSI protocol, available from http://www.ietf.org. • RFC4171 - Internet Storage Name Service (iSNS): Detailed specification for the iSNS protocol, available from http://www.ietf.org. • The Microsoft iSCSI Software Initiator User's Guide: (uguide.doc) This document is packaged with the initiator download and installs to the default location, usually: C:\Windows\iscsi\uguide.doc. It can also be downloaded from the Microsoft web site. SnapServer Administrator Guide 77
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