ATTO Technology 2500C operation manual Checking the host system

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Checking the host system

The faster the host, the faster your transfer times are. The work flow goes only as fast as the slowest connection in the host system, so transferring data from an IDE drive, 100Mb connection, a DLT 4000, a high speed RAID volume across the country, or other applications, slows the system no matter how fast everything else is in the system.

1Verify that the iSCSI storage adapter or NIC is connected to the fastest PCI bus connector supported by the adapter or NIC.

If the adapter supports PCI-X, place the adapter in a PCI-X slot. If one is not available, the host might not achieve the optimal performance capable from the adapter.

Even placing a PCI-X adapter into a 64 bit 66 MHz slot loses performance. Some adapters

adjust clock speed depending on the speed of the PCI slot into which they are plugged.

2The host OS disk and swap disk/partition/file should be on a high speed drive such as a SCSI drive to minimize the time needed to access the host’s virtual memory.

The more memory a system has, the less time it spends accessing virtual memory (hard drive space).

Checking the Operating System

If possible, eliminate swap space and virtual drives which require large amounts of system memory. However, the OS might not allow the elimination of swap space. An OS set to run many kinds of different servers spends much of its CPU cycle on other operations, thus slowing down performance.

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Contents Atto iPBridgeTM 2500C/R/D Page Page Contents Copying iPBridge configurations Additional configurationsTroubleshooting Atto ExpressNAV interfaceAlternative interface options Maintenance commandsDiagnostic commands Ethernet commands Scsi configuration commandsSerial port configuration commands ISCSI commands Ndmp commandsMapping commands Appendix a Atto iPBridge, FibreBridge familyPage Intelligent Bridging Architecture, the engine IPBridge2500 featuresIPBridge 2500 provide storage options Connectivity, infrastructure solutions Possible storage ConfigurationsAtto iPBridge 2500R/D LED indicators Installation instructionsExhibit 1.1-1 Atto iPBridge 2500R/D connector side Serial interfaceBack connector side Height of tallest component .535 inches Operating Temperature 0-70C externalAtto iPBridge 2500C Exhibit 1.2-1 Atto iPBridge 2500C faceplate Exhibit 1.2-2 Atto iPBridge 2500C board layout Microsoft iSCSI Initiator changes Configuring the iPBridgeClick Launch Browser Getting an IP addressHow Ndmp works Ndmp configuration provides backupAssign Ndmp names to devices Setting up NdmpProcedure Map devices automatically Mapping devices NdmpMap devices manually Click AutoMapConfiguration mapping Ndmp Node names Single Target modeMapping devices iSCSI Automatically configure Multiple Target mode Multiple Target modeManually configure Multiple Target mode Click on the Multi Target Mode enabled button Click SubmitExhibit 2.4-1 Examples of single and multiple target modes Mapping single vs. multi target modeExhibit 2.4-2 Mapping with Atto ExpressNAV Change the current user name, password Additional configurationsCreate a read only password or user name Set the Real Time ClockSnmp protocol Configuring Scsi devicesAtto ExpressNAV interface Accessing ExpressNAVBrowser compatibility To optimize ExpressNAV in Internet ExplorerExhibit 3.0-1 An ExpressNAV ExpressNAV pages Help FirmwareRestart Using FTP over GbE Using Atto ExpressNAVUpdating firmware Preliminary stepsUsing ZModem over the serial port Copying iPBridge configurationsZModem send clone.cln Send File/ZModem sendInside out method TroubleshootingCheck the host event log Check the iPBridge event and trace logsCheck host versions Check for problems on attached devicesComponent check Checking Scsi devicesChecking the serial port Checking the iPBridge internal configurationChecking iPBridge Ethernet ports Checking the LAN/WANChecking the iSCSI OS driver Checking the iSCSI Host Adapter or NICChecking the Operating System Checking the applicationsChecking Ethernet Host Adapter or NIC Performance issuesChecking iPBridge Scsi ports Checking the host system Use the serial port or header Alternative interface optionsUse Telnet Type iPBridge in the New Connection dialog boxAtto Exhibit 7.0-1 Start up messagesCLI provides ASCII-based interface Command conventions Symbol IndicatesCommand Defaults Example CLI commands summarySntp 38 CLI General use commands VerboseMode UsernameMaintenance commands SNTPServer SpeedWriteDefaultSpeedWrite TimeDiagnostic commands DumpTraceLog DumpEventLogEventLog EventLogFilterRouteDisplay PingSCSIPortList SCSITargetsSNMPTrapAddress TemperatureSNMPTraps TailEventLogScsi configuration commands VirtualDriveResponse Performance enhancement to newly-mapped Scsi devicesSerialPortEcho Serial port configuration commandsSerialPortBaudRate 50 CLI Ethernet commands 52 CLI NDMPAuthType Ndmp commandsNDMPMaxVersion NDMPPortNumber54 CLI ISCSI commands MultiTargetMode ISNSLoginControlISNSServer Route Mapping commandsAutoMap List to the map which satisfies a search for the given LUN IPBridge products Product features 2500C/R/D 2700C/R/D 1500E/D 1550E/DAppendix a Atto iPBridge, FibreBridge family Fibre Bridge products Scsi cabling Appendix B CablingCable types ExamplesEthernet connections Term Definition Appendix C GlossaryVi Appendix FCC Standards Radio and Television Interference Appendix D Safety standards and compliancesEuropean Standards Appendix E Atto accessories Contact Atto Technology, Inc Appendix F Warranty, contact information