ATTO Technology 1550D operation manual Check the host system, FirstBurstLength

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2Verify that each associated port in the IP SAN is configured for 1000Mbs.

IP SAN traffic should be segmented so that it does not interfere with the main LAN network traffic.For better performance, the IP SAN should be on its own set of hardware.

3Verify that packets are not being dropped along the LAN/WAN. Many utilities track packet activity and switch statistics.

Check the Ethernet Host Adapter or NIC Ethernet Storage Adapters generally outperform accelerated NICs and un-accelerated NICs by offloading most of the processing from the host.

An accelerated NIC provides some offloading, but still requires a host OS iSCSI driver, making the host spend more CPU cycles.

An un-accelerated NIC does not offload anything so the CPU must do much of the processing.

To check the Ethernet host adapter or NIC

1Verify that the adapter or NIC is sent to auto- negotiate or forced to 1000 Mb.

2Set the MTU size to the largest MTU size supported in the LAN/WAN.

9k frame size is the current optimized frame size for the iPBridge. Many switch and router vendors do not support the larger frame size of 9k or 16k. Set the maximum transfer size to the most efficient size for the intended target(s). For many tape drives, 64k is the optimal setting.

Check the applications

Some applications can be configured to change transfer sizes. Configure the application for the optimal size for the particular SCSI device(s) connected to the iPBridge.

Check 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.

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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).

Check 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.

Use the ATTO iSCSI performance configuration tool (Windows only)

The ATTO iSCSI performance configuration tool changes the Windows registry parameters for Microsoft iSCSI Initiator and TCP/IP to enhance overall data throughput.

1From the CD which came with your iPBridge, copy the Perftune.exe file to your hard drive.

2Execute the program.

3Click on Use ATTO Performance Settings. Settings take effect on the next system reboot.

The following settings are affected:

FirstBurstLength

The maximum amount, in bytes, of unsolicited data an iSCSI initiator may send to the target during the execution of a single SCSI command including the immediate data and the sequence of unsolicited Data-Out PDUs which follow the command. FirstBurstLength cannot exceed MaxBurstLength

ATTO value: 1048576 decimal 00100000 hex

ATTO Technology Inc. iPBridge Installation and Operation Manual

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Contents IPBridge 1550D Atto Technology, Inc Contents Interface options Appendix C Safety standards and compliances XivUpdating firmware Appendix a CablingPage Features Atto iPBridge provides storage optionsExhibit 1.0-1 Possible storage solutions using the iPBridge Physical components Exhibit 1.1-1 iPBridge 1550D back panel Installing the iPBridge InstallationUnpacking the packing box verifying contents Installing Windows driversSelect Internet Options Installing MS iSCSI Initiator for WindowsBeginning initial configuration Uncheck the Require server verification check boxExpressWizard Configure the iPBridgePreliminary steps Page Target management Default target nodeAutomatically configure a single target Target namesMultiple target nodes Automatically configure multiple targetsManually configure multiple target nodes Click on the Map each device to its own target buttonExhibit 3.1-1 Target node configurations Ethernet ISCSI configurationChap commands ISCSIOptional changes Modify passwordsSet up a Vlan Virtual Local Area Network Preliminary stepsISCSI performance configuration tool Windows only Enhance performanceRemote system monitoring SnmpUpdating firmware Using Atto ExpressNAVUsing FTP Inside out method TroubleshootingCheck basic diagnostic tools Check the host event logCheck the iPBridge Scsi port Check componentsCheck Scsi devices Check the serial portCheck the iPBridge Ethernet port Check the LAN/WANCheck the Operating System Performance issuesCheck the iSCSI OS driver Check the applicationsCheck the host system Reset to factory defaults Optimize Atto ExpressNAV in Internet ExplorerInterface options Using ExpressNAVUsing the serial port Opening an ExpressNAV sessionUsing Telnet EnterCable types Appendix a CablingScsi cabling ExamplesConnecting Scsi devices to the Scsi port Ethernet connectionsSymbol Indicates Appendix B CLI provides an ASCII-based interfaceCLI error messages CLI summaryCommand Default Example RmonAlphabetical CLI command explanations FirmwareRestart DumpConfigurationDate DeleteAllMapsISCSIAlias IPGatewayIPSubnetMask ISCSIChapReadOnlyPassword ISNSLoginControlPassword RestoreConfigurationSCSIPortResetOnStartup SaveConfigurationSCSIPortReset RouteSCSITargetLUNs SerialPortBaudRateSerialPortEcho SNMPDumpMIBUsername SpeedWriteDefaultSNTPServer VerboseModeXiii Appendix C Safety standards and compliances FCC Standards Radio and Television InterferencePage Xvi

1550D specifications

ATTO Technology 1550D is an advanced Thunderbolt 3 to 10Gb Ethernet adapter designed to enhance networking capabilities for professionals, content creators, and businesses. Known for its compact design and robust performance, the 1550D is engineered to provide a seamless and efficient connection to high-speed networks, making it an ideal solution for a variety of demanding applications.

One of the standout features of the ATTO 1550D is its ability to support high-bandwidth data transfers. With Thunderbolt 3 technology, users can achieve speeds up to 40Gbps, allowing for quick and efficient file transfers. This is particularly beneficial for users dealing with large files, such as video editing and data-intensive graphic design, where every second counts.

The ATTO 1550D also supports 10Gb Ethernet connections, which enables users to connect to existing network infrastructures with ease. This dual compatibility ensures that professionals can maintain productivity and workflow without the need for extensive infrastructure upgrades. The adapter's support for both static and dynamic IP addressing adds an extra layer of versatility, catering to diverse networking environments.

In terms of characteristics, the ATTO 1550D features a compact and durable design, making it portable and easy to integrate into any workspace. The sleek form factor allows for straightforward connectivity, fitting effortlessly into modern setup configurations. Moreover, its plug-and-play functionality means that users can quickly establish connections without the need for extensive setup processes or additional drivers.

The adapter also boasts advanced features such as link aggregation, which allows for increased throughput and redundancy, enhancing overall network performance. This is crucial for organizations that require reliable network connections to maintain operational efficiency. The ATTO 1550D is built with high-quality components that ensure durability and longevity, ideal for both field and studio environments.

Overall, the ATTO Technology 1550D positions itself as a premier solution in the realm of Thunderbolt 3 to Ethernet adapters, combining speed, reliability, and flexibility. Whether used for high-speed data transfers or stable network connectivity, it meets the demands of today's high-performance computing environments, making it an essential tool for tech-savvy professionals and businesses alike.
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