EMC QLogic manual How to Determine I/O Latency and Load on the Boot LUN

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Configuring an EMC Boot Device

◆Storage Area Network service/upgrade procedures, such as firmware upgrades or hardware replacements

EMC recommends moving the Windows virtual memory paging file to a local disk when booting from the storage array. Consult your Windows manual for instructions on how to move the paging file.

How to Determine I/O Latency and Load on the Boot LUN

The current restrictions for boot-from-array configurations listed in the EMC Support Matrix represent the maximum configuration that is allowed using typical configurations. There are cases where your applications, host, array, or SAN may already be utilized to a point when these maximum values may not be achieved. Under these conditions, you may wish to reduce the configuration from the maximums listed in the EMC Support Matrix for improved performance and functionality.

Here are some general measurements than can be used to determine if your environment may not support the maximum allowed boot-from-array configurations:

◆Using the Windows Performance Monitor, capture and analyze the Physical Disk and Paging File counters for your boot LUN. (For Windows NT 4.0, you might have to enable disk performance counters manually; refer to Microsoft support for the description and use of the Windows Performance Monitor.) If response time (sec/operation), or disk queue depth seem to be increasing over time, you should review any additional loading that may be affecting the boot LUN performance (HBA/SAN saturation, failovers, ISL usage, and so forth).

◆Use available Array Performance Management tools to determine that the array configuration, LUN configuration and access is configured optimally for each host.

Possible ways to reduce the load on the boot LUN include:

◆Move application data away from the boot LUN.

◆Reduce the number of LUNs bound to the same physical disks.

◆Select an improved performance RAID type.

◆Contact your EMC support representative for additional information.

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Contents REV A07 Trademark Information Copyright 2001-2005 EMC Corporation. All rights reservedContents Chapter Configuring an EMC Boot Device Chapter Installing and Configuring the QLogic QLA4010 iSCSI Appendix B TroubleshootingAppendix a Third-Party Software Problem Index EMC uses the following conventions for notes, cautions, Damage to the system or equipment. The caution may apply toHardware or software Related Documentation Typographical Conventions PalatinoBold Introduction Understanding Persistent Binding in a Fabric Environment Understanding Persistent Binding in a Fabric Environment HBA Installing Configuring the HBA Driver Downloading QLogic Drivers Firmware Verifying Documentation IntroductionInstalling an HBA Check for an Updated HBA Driver Move the jumpers, onto pins 1-2 if not already there Reconfigure the HBA JumperSet the HBA FC-AL Loop ID Installing an HBA Settings menus EMC HBA SettingsPre-Configured SettingsConfiguring Nvram for Stratus ftServers QLogic HBAs Firmware/BIOSFibre-Down Servers With EmbeddedUpdating While Running Windows Press the Down Arrow until you select Data Rate then press EMC HBA Settings Driver Revision History Where to Find the Driver Installing the HBA DriverSelect have Disk Windows 2003 STORPort UpdatesExtended Error Logging by QLogic Drivers Installation Procedure for Windows NT HostsAdministrative Tools, Computer Management Installing the HBA Driver Double-click the Scsi & RAID Controllers icon Installing and Configuring the HBA Driver Upgrading to Windows 2003 from Windows 2000 or Windows NT Replacing an HBA Masking Enabled EMC SymmetrixArrays with Device Powermt restore powermt display Installing and Configuring the HBA Driver Configuring an EMC Boot Device Risks of Booting from the Storage Array Boot-from-SAN Configuration RestrictionsHow to Determine I/O Latency and Load on the Boot LUN Boot-from-SAN with Mscs Boot Crashdump Save to Disk BehaviorConfiguring the Boot Bios Configuring a Symmetrix Boot DeviceConfiguration Settings menu From the Configuration Settings menu, select Host AdapterFrom the Host Adapter Settings menu, select Host Adapter Select Current Boot Node Name and press EnterInstalling the Windows OS onto the Boot Device Installing EFI boot code onto the HBA Unload 5D Configuring an EMC Boot Device Configurable Components Drv5DCtrl60Langeng Configuring an EMC Boot Device Configuring a Symmetrix Boot Device Configuring a CLARiiON Boot Device ProcedureFlowchart Configuring a CLARiiON Boot Device Configurations, Revisions Hardware Software Requirements RequirementsTopologies Refer to Downloading QLogic Drivers and Firmware on Preparing the Storage SystemSetting Up the HBA Bios Preparing the Fabric Configuring an EMC Boot Device What Next? Node NamePreparing the Server Boot Bios Configuring the HBAConfiguring an EMC Boot Device When the QLogic Bios banner shown in appears, press Windows Licensing Agreement appears Configuring a CLARiiON Boot Device Verifying HBA Driver and Digital Signature Installation Assigning a Permanent Boot Drive Letter for Windows NT Installing Multipath and Failover SoftwareWhat Next? From here Installing Additional Navisphere Host Agent Software Storagegroupname y/n? Configuring an EMC Boot Device On the Computer Management window, click Disk Management Trespassing the Boot LUN Using atftrespassStarting a Fresh Installation Boot Time and LUN AvailabilityBoot Time and LUN Availability EMC Symmetrix EMC CLARiiON Replacing a Boot HBAExplanations of Entries How a Server Responds to Failure in the Boot LUN PathNtosknl Bsod Known IssuesHBA TOE Windows 2003 STORPort Updates Next dialog, click ReInstall Driver, and then, click Next Installing and Configuring the QLogic QLA4010 iSCSI HBA TOE Installing and Configuring the QLogic QLA4010 iSCSI HBA TOE Installing and Configuring the QLogic QLA4010 iSCSI HBA TOE Installing and Configuring the QLogic QLA4010 iSCSI HBA TOE Configuring iSNS settings for QLA4010 Configuring iSNS settings for QLA4010 Installing and Configuring the QLogic QLA4010 iSCSI HBA TOE Configuring iSNS settings for QLA4010 Installing and Configuring the QLogic QLA4010 iSCSI HBA TOE Configuring iSNS settings for QLA4010 Installing Boot Bios on the QLA4010 iSCSI HBA from DOS Select iSCSI Boot Settings Select Configuration Settings from the menuSelect iSCSI Boot Settings, and press Enter Installing and Configuring the QLogic QLA4010 iSCSI HBA TOE Installing and Configuring the QLogic QLA4010 iSCSI HBA TOE Third-Party Software QLogic SANSurfer SANBlade Manager SANSurfer versions include Initial Release SANSurfer Version HistoryVeritas Volume Manager Veritas Volume Manager 3.x for WindowsVeritas Foundation Suite Veritas Volume Manager 3.1 and Veritas DMPThird-Party Software Troubleshooting Problems and Solutions ProblemSolution Later already contain this correction Flasutil Index Nvram