ATTO Technology iPBridge 2600 Скачать руководство пользователя страница 27

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Performance issues

If the host is not getting the performance it should, 
check the following items. 

Check SCSI devices

1

Verify that the devices are running at their 
highest possible SCSI speed.
Mixing SE and LVD devices on the same SCSI 
bus forces the speed of the bus to SE, thus 
slowing faster LVD devices. The iPBridge 
cannot accelerate an already slow device. 
Refer to 

Connecting SCSI devices to SCSI 

ports

 on page i of the Appendix.

2

Verify that the proper terminator is being used. 
An SE terminator forces the SCSI bus to SE 
speeds.

Check iPBridge SCSI ports

1

Verify that the SCSI port configuration is set to 
the highest speed using the ATTO ExpressNAV 
interface or CLI. 
The iPBridge SCSI port speed, wide 
negotiation, and sync negotiation settings all 
affect the speed of the port. By default, these 
settings are set for optimal speed.

2

Verify that the SCSI devices are equally 
distributed between the SCSI ports. 

3

Optimal performance is seen when only two 
high-speed SCSI devices are connected to 
each SCSI port.

Check iPBridge Ethernet ports

1

Verify that the data ports are set to auto 
negotiate or forced to 1000 Mb/sec. 

2

Verify that the MTU size is set to optimal setting 
for the LAN/WAN environment. 
The current optimized frame size for the 
iPBridge is 9k.

3

Verify that the iPBridge Trace Log feature is 
disabled. Refer to 

TraceLog 

 on page xiv in the 

Appendix. The log tracks certain events that 
occur in the iPBridge. With this log enabled, 
performance suffers.

Check the LAN/WAN

1

Verify that the MTU size is set to optimal setting 
for the LAN/WAN environment. 
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. 

2

Verify 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.

3

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

Check 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

1

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

2

Set 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.

Содержание iPBridge 2600

Страница 1: ...ATTO iPBridge 2600 Installation and Operation Manual...

Страница 2: ...ech com Technical support Monday Friday 8am 8pm EST techsupp attotech com 2007 ATTO Technology Inc All rights reserved All brand or product names are trademarks of their respective holders No part of...

Страница 3: ...iSCSI Initiator for Windows Install iSCSI Initiator for OS X Set up Internet Explorer Begin configuration 3 Configure the iPBridge 7 Preliminary steps ExpressWizard 3 1 Target management 9 Target name...

Страница 4: ...Bridge Ethernet port Check the LAN WAN Check the iSCSI Host Adapter or NIC Check the iSCSI OS driver Check the Operating System Check the applications Performance issues Check SCSI devices Check iPBri...

Страница 5: ...es to SCSI ports Ethernet connections Appendix B CLI provides an ASCII based interface iii CLI error messages CLI summary Alphabetical CLI command explanations Appendix C Safety standards and complian...

Страница 6: ...e accessed from virtually anywhere that can be reached through the Internet eliminating physical boundaries iSCSI also lowers the investment cost of adding new servers to a SAN for both primary storag...

Страница 7: ...2 Exhibit 1 0 1 Possible storage configurations...

Страница 8: ...tified Management ports A 100 Mb sec Ethernet standard RJ 45 management port and an RS 232 serial port provide support for remote monitoring and management The serial port is set at the factory at 115...

Страница 9: ...4 Exhibit 1 1 1 Details of the LED indicators on the front and connector sides of the iPBridge...

Страница 10: ...other equipment in the rack must not overload the supply circuit and or wiring of the rack 6 Turn on the power switch on the iPBridge 7 Wait up to two minutes for the iPBridge Ready LED to light indic...

Страница 11: ...dows Disk Management Continue to Begin configuration Install iSCSI Initiator for OS X Contact your ATTO sales representative or go to www attotech com to purchase the ATTO Technology Xtend SAN iSCSI I...

Страница 12: ...menu then continue in one of three ways Review the settings keeping the automatic settings created when you powered up your iPBridge and do nothing now Use the ExpressWizard accessed from the side me...

Страница 13: ...Jumbo Frames 10 Click Next 11 Set your administrator password 12 Click Next 13 The configuration for the iPBridge based on your input in the previous screens appears If the information is correct cli...

Страница 14: ...thernet port on an iPBridge is identified by a unique world wide iSCSI qualified name This format references the iPBridge serial number and target node name iqn 1995 12 com attotech ipbridge serialnum...

Страница 15: ...in a standard browser as found in Using ExpressNAV on page 25 click Enter Here type in your user name and password and click OK 2 The Status page appears From the ExpressNAV main menu select Auto Targ...

Страница 16: ...11 ATTO Technology Inc iPBridge Installation and Operation Manual Exhibit 3 1 1 Target node configurations...

Страница 17: ...PBridge will delegate its access control authorization to an iSNS server Default is disabled Note iSNS Login Control cannot be used with Access Control found on the iSCSI Target Management page iSNSSe...

Страница 18: ...ndicated 4 Enter appropriate information into the New Admin Password Confirm New Admin Password or New Read Only Password and Confirm New Read Only Password text boxes 5 Click Submit 6 Go to the Resta...

Страница 19: ...he 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 MaxBurstLengt...

Страница 20: ...nly warnings and critical event notifications are sent All means warnings critical events and informational messages are sent SNMP An agent resides in the iPBridge which takes information from the iPB...

Страница 21: ...ient with a critical severity level only receives critical messages and not warning or informational messages When an event occurs that warrants Email notification the iPBridge sends the message it ca...

Страница 22: ...turns the Ready prompt Interrupting the flash process will make your iPBridge inoperable and you must return it to ATTO Technology for repair Using ATTO ExpressNAV 1 If you have not already open an Ex...

Страница 23: ...ication Check basic diagnostic tools Check the host event log Check the event log on the host Look for the most recent entries and determine what could be causing a problem then go to that event and c...

Страница 24: ...m power lights that should be on before startup and turn off when system boots 4 Verify the external terminator is the correct type and does not have damaged pins 5 Check cable integrity Check the cab...

Страница 25: ...r solid connections Cat5 cable can cause connection issues with Gigabit Ethernet Cat6 cable is the best cabling for the iPBridge 2 Verify the IP address subnet mask and gateway are properly set on eac...

Страница 26: ...he switch properly You may have to force the host or switch to the desired speed For a NIC using an OS iSCSI driver continue to the iSCSI OS driver section Check the iSCSI OS driver This section is fo...

Страница 27: ...and router vendors do not support the larger frame size of 9k or 16k 2 Verify that each associated port in the IP SAN is configured for 1000Mbs IP SAN traffic should be segmented so that it does not...

Страница 28: ...our hard drive 2 Execute the program 3 Click on Use ATTO Performance Settings Settings take effect on the next system reboot The following settings are affected FirstBurstLength The maximum amount in...

Страница 29: ...Microsoft VM Java permissions and make sure Disable Java is not selected 6 Go to the Miscellaneous topic and select METAREFRESH Reset restore factory defaults To reset the iPBridge briefly insert a to...

Страница 30: ...ugh the menu at the side of each page An image on each page s header shows each port in the product faceplate Each port is clickable and takes you to the appropriate page If you have completed configu...

Страница 31: ...two meters in length Using Telnet Up to three Telnet sessions can be conducted simultaneously A serial port session can use the CLI while Telnet sessions are open Whichever session issues the first se...

Страница 32: ...tower requires 1 meter of cabling to connect all of its drives the distance from the tower to the host must be 5 meters Note UltraSCSI is very sensitive to SCSI bus noise cable distances and the numbe...

Страница 33: ...after the last device The iPBridge is terminated internally Ethernet connections Use at least Cat 5e cable to connect the Ethernet ports to your network Note For best performance all cabling network i...

Страница 34: ...the value of a parameter or setting and is an informational command Responses to get commands are followed by Ready The set form is an action that changes the value of a parameter or configuration se...

Страница 35: ...ian Changing parameters may cause loss of data and or disruption to performance and reliability of the iPBridge The ExpressNAV interface is the preferred method to operate and manage the iPBridge Refe...

Страница 36: ...IPDHCP enabled set ipdhcp mp1 disabled IPGateway 0 0 0 0 get ipgateway mp1 IPSubnetMask 255 255 0 0 get ipsubnetmask mp1 ISCSIAlias set iscsialias diamond iSCSIChap disabled set iscsichap default ena...

Страница 37: ...00 SerialPortEcho enabled set serialportecho disabled SNMP enabled set snmp disabled SNMPDumpMIB snmpdumpmib SNMPExtendedTraps disabled set snmpextendedtraps enabled SNMPTrapAddress IP address 0 0 0 0...

Страница 38: ...egulates automatic device detection and mapping AutoMap at startup Default disabled set AutoMapOnBoot enabled disabled get AutoMapOnBoot BridgeModel Reports specific model and firmware information get...

Страница 39: ...the event log to the ExpressNlAV Advanced page text box an available RS 232 or telnet session Results may be truncated in the ExpressNAV readout DumpEventLog DumpTraceLog Dumps the entire contents of...

Страница 40: ...ogFilter subsystem all level all Exit Terminates the current CLI session over Telnet This command has no effect if used during a serial CLI session Exit ExpressFairness Enables an iSCSI fairness algor...

Страница 41: ...tion using the CHAP secrets An initiator may reject this negotiation If discovery is specified the setting applies to CHAP during discovery sessions Default disabled set iSCSICHAP default Target Name...

Страница 42: ...0 0 0 to disable iSNS server lookup Default 0 0 0 0 set iSNSServer xxx xxx xxx xxx get iSNSServer IsReserved Displays the reservation status of the current iPBridge IsReserved MaxOpTemp Regulates the...

Страница 43: ...able In verbose mode overwriting a map requires secondary confirmation Route iSCSI default Target Name lun SCSI sb st sl Bridge Delete RouteDisplay Displays s a combined list of iSCSI to SCSI bus targ...

Страница 44: ...tLUNs sb SCSITargets Lists the physical devices that are connected and running on the specified SCSI port SCSITargets sb SerialNumber Displays the serial number of the iPBridge The serial number is a...

Страница 45: ...ices attached to the iPBridge Specify all to set the Speed Write state for each currently mapped device on the iPBridge or to get a list of the Speed Write states of all currently mapped devices on th...

Страница 46: ...s disabled for that data port set VLAN dp1 all VLAN ID VLAN Name delete all delete get VLAN dp1 all Voltage Displays the current voltage levels monitored by the unit get Voltage VDDA VDDB VDDC VDDD al...

Страница 47: ...nt in a residential area is likely to cause interference in which case the user at his own expense will be required to take whatever measures may be required to correct the interference If this equipm...

Страница 48: ...4 CE60950 This Declaration will only be valid when this product is used in conjunction with other CE approved devices and when the entire system is tested to the applicable CE standards and found to b...

Страница 49: ...or an inappropriate application of this product shall not be the responsibility of Manufacturer Manufacturer s liability is limited to Manufacturer s product s damage to other equipment connected to...

Страница 50: ...xix ATTO Technology Inc iPBridge Installation and Operation Manual...

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