APC iSCSI SATA II installation and configuration manual ISCSI Introduction, Hba Ip San

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2.7 iSCSI Introduction

iSCSI (Internet SCSI) is a protocol which encapsulates SCSI (Small Computer System Interface) commands and data in TCP/IP packets for linking storage devices with servers over common IP infrastructures. iSCSI provides high performance SANs over standard IP networks like LAN, WAN or the Internet.

IP SANs are true SANs (Storage Area Networks) which allow few of servers to attach to an infinite number of storage volumes by using iSCSI over TCP/IP networks. IP SANs can scale the storage capacity with any type and brand of storage system. In addition, using any type of network (Ethernet, Fast Ethernet, Gigabit Ethernet) and combining operating systems (Microsoft Windows, Linux, Solaris, …etc.) within the SAN network. IP-SANs also include mechanisms for security, data replication, multi-path and high availability.

Storage protocol, such as iSCSI, has “two ends” in the connection. These ends are the initiator and the target. In iSCSI we call them iSCSI initiator and iSCSI target. The iSCSI initiator requests or initiates any iSCSI communication. It requests all SCSI operations like read or write. An initiator is usually located on the host/server side (either an iSCSI HBA or iSCSI SW initiator).

The iSCSI target is the storage device itself or an appliance which controls and serves volumes or virtual volumes. The target is the device which performs SCSI commands or bridges it to an attached storage device. iSCSI targets can be disks, tapes, RAID arrays, tape libraries, and etc.

Host 1

(initiator)

NIC

Host 2

(initiator)

iSCSI

HBA

IP SAN

iSCSI device 1	iSCSI device 2
(target)	(target)

The host side needs an iSCSI initiator. The initiator is a driver which handles the SCSI traffic over iSCSI. The initiator can be software or hardware (HBA). Please refer to the certification list of iSCSI HBA(s) in Appendix A. OS native initiators or other software initiators use the standard TCP/IP stack and Ethernet hardware, while iSCSI HBA(s) use their own iSCSI and TCP/IP stacks on board.

Hardware iSCSI HBA(s) would provide its initiator tool. Please refer to the vendors’ HBA user manual. Microsoft, Linux and Mac provide software iSCSI initiator driver. Below are the available links:

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Contents ISCSI Sata II RAID Subsystem Table of Contents Advanced Operation Introduction Key Features Technical Specifications Width TerminologyCopy RAID rowScsi Enclosure Services Scsi Accessed Fault- Tolerant EnclosuresMechanism to control access to an iSCSI storage system over ISNS Internet Storage Name ServiceRAID Concepts RAID FundamentalsDisk Striping Definition of RAID Levels Page Summary RAID Level Description Min. Drives RAID ManagementRAM Volume Relationship DiagramUnpacking the Subsystem Packaging, Shipment and DeliveryIdentifying Parts of the iSCSI RAID Subsystem HDD Status IndicatorFront View Parts FunctionEnvironment Status LEDs LCD Display Panel LCD Control Module LCMRear View Powering On Connecting the iSCSI RAID Subsystem to Your NetworkCarrier Open Button Installing Hard DrivesHBA IP SAN ISCSI IntroductionWeb GUI Management MethodsConsole Serial Port Remote Control Secure ShellLCD Control Module LCM EnclosureRAID System Buzzer Mail setting Æ Mail SettingISCSI RAID Subsystem GUI Hierarchy Reboot and Æ Reboot / Shutdown LoginShutdown Sure to logout?Language Status IndicatorsQuick Install System Configuration System Setting IP Address Login Setting Mail Setting Net-SNMPhttp//net-snmp.sourceforge.net Notification SettingPage Entity Property ISCSI ConfigDefault gateway IP settings2 NIC MTU / Jumbo frameNode Session Chap Account Volume Configuration Volume Create Wizard Page Physical Disk It’s done. View the Physical disk PD operations description Vendor Serial Type Write cache StandbyIt’s done. View the RAID group RAID GroupStatus Health RG column description Name TotalGB FreeGBShow RAID group detail information It’s done. View the Virtual disk VD column description Virtual DiskRight Priority Bg rate Status Health RAID #LUN RG name Page Logical Unit Select / Volume configuration / RAID group Example¾ Example Select / Volume configuration / Virtual disk Attach LUN to VD There are 2 methods to attach LUN to VD / Volume configuration / Logical unit Select / Volume configuration / Physical diskHave an error when deleting this RG Enclosure Management SES Configuration Hardware Monitor Hard Drive S.M.A.R.T. Function 4 UPS UPS Type Shutdown Battery Level Shutdown Delay sSystem Information System MaintenanceReset to Default UpgradeConfig Import & Export Event Log Logout Reboot and ShutdownRebuild Advanced OperationRAID 0+1 Way mirrorRG Migration Page VD Extension Support Microsoft Mpio and MC/S Disk RoamingVendor Model Certification ListISCSI Initiator Software Software/Release NumberISCSI HBA card Vendor Model GbE Switch Vendor ModelHard drive Vendor Model PD events Level Type Description Event NotificationsHW events Level Type Description š EMS events Level Type Descriptionš LVM3 events Level Type Description š RMS events Level Type DescriptionVD migration VD name completes migration Finished š Battery backup events Level Type Description š iSCSI events Level Type Descriptionš Jbod events Level Type Description š System maintenance events Level Type Description Known IssuesClick Discovery Microsoft iSCSI InitiatorClick Targets Page Click Details Introduction Installation Steps for Large Volume Over 2TBPage Page Mpio and MC/S Setup Instructions Click Mpio tab, select Load Balance Policy to Round Robin Enable Enable multi-path checkbox. Then click Advanced…Choose Round Robin in Load Balance Policy System information ISCSI RAID Subsystem