Q-Logic 4000 SERIES manual System Registry Parameters, Double-clickMaximumSGListREGDWORD0x21

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4 – Windows NT Driver Installation System Registry Parameters

Q

4.6

System Registry Parameters

The following system registry parameters are available with the QLA40xx HBA:

MaximumSGList

NumberofRequests

LargeLuns

4.6.1

MaximumSGList

Windows NT includes enhanced scatter/gather list support for doing large SCSI I/O transfers. Windows NT supports up to 256 scatter/gather segments of 4096 bytes each, allowing transfers up to 1,048,576 bytes.

NOTE: The OEMSETUP.INF file automatically updates the registry to support 33 scatter/gather segments. This setting provides the best overall performance.

To change this value, follow these steps:

1.Click Start, click Run, and open the REGEDT32 program.

2.Select HKEY_LOCAL_MACHINE and follow the tree structure to the QLogic driver:

HKEY_LOCAL_MACHINE SYSTEM CurrentControlSet Services

Ql4000 Parameters Device

3.Double-clickMaximumSGList:REG_DWORD:0x21.

4.Enter a value from 16 to 255 (10h to FFh). A value of 255 (FFh) enables the maximum 1-MB transfer size. Any value above 255 enables 64K transfers. The default value is 33 (21h).

5.Click OK.

6.Exit the REGEDT32 program, then restart the system.

4.6.2

NumberofRequests

Windows NT supports the NumberOfRequests registry parameter to specify the maximum number of outstanding requests per HBA. When the QLogic driver is

4-4

IS0053301-00 D

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Contents SANblade 4000 Series User’s Guide Page Table of Contents Section Red Hat Linux Driver Installation Figures Tables Introduction How to Use this GuideGeneral Description Features Hardware Hardware IS0053301-00 D QLA4000/4000C QLA40xx HBA ComponentsLEDs QLA4000C HBA LayoutInstallation in the Computer Specifications QLA40xx HBA Operating EnvironmentAgency Certification LabelEMI and EMC Requirements Product Safety Requirements Software II Software II-2 IS0053301-00 D Windows 2000 Driver Installation QL4000.SYS Supported FeaturesDriver Files Creating the Driver Disk OptionalInstalling the Driver Adding the QLA40xx HBA to the Existing OS Start Device Driver Installation dialog box, click NextSelect specify a location. Click Next Updating the Existing Driver Removing the DriverMaximumSGList System Registry ParametersDouble-clickMaximumSGListREGDWORD0x41 NumberofRequests Windows NT Driver Installation QL4000.SYS Adding the QL4000.SYS Driver to the Existing OS Select the QLogic QLA4000 PCI iSCSI Adapter and press EnterSelect QLogic QLA4000 PCI iSCSI Adapter, then click OK Double-clickMaximumSGListREGDWORD0x21 LargeLuns Additional NotesPage Introduction Red Hat Linux Driver InstallationCreating the Driver Disk Building a Custom Kernel to Load the Driver Automatically Edit Makefile under the kernel scsi directory. For example For Red Hat Linux 8.0, locate the following lines Building a Driver from the Source Code Building a Uniprocessor UP Version of the Driver Enter Loading the Driver Manually Building a Ramdisk Image to Load the Driver AutomaticallySystem Driver Parameter maxscsiluns For exampleLimitations Proc Filesystem SupportSolaris Driver Installation QLA4000 Pre-installation RequirementsYou are prompted to select a driver package. For example Installing QLogic QLA4000 driver as QLA4000-0 Target and LUN Support for Disk DevicesTarget and LUN Support Tape Devices Uninstalling the Solaris Sparc Driver You are prompted to remove the driverPage SANblade Control III-2 Installation Procedure Windows NT and WindowsInstallation Introduction Dialog Box Choose Shortcut Folder Dialog Box Install Complete Dialog Box Red Hat Linux and Solaris SparcUninstalling SANblade Control Windows NT/WindowsRed Hat Linux or Solaris Sparc Getting StartedMain Window and Window Navigation Host Information Tabbed Page Main WindowView FileHelp Target Information Tabbed LUN List Tabbed Host Tabbed Host Information TabbedHBA Tabbed Pages Firmware Network11. HBA Options Tabbed Page Network Target Settings Tabbed 12. Target Settings TabbedTarget Information Tabbed 13. Target Information TabbedHBA Information Tabbed Configuring the QLA40xx HBAFrom the Select Options list, click Network see figure 15. HBA Tabbed Page Network Changing the Firmware Configuration Parameters Select Options box, select Firmware18. Save Firmware Parameters Message IS0053301-00 D Configuring Targets Configuring Specific TargetsConfiguring Using Discovery Changing the Target Configuration Parameters Click the Target Settings tabFirmware Upgrade Click the Select File to Download button20. Update Firmware Dialog Boxes SANblade Control iX Firmware Upgrade IS0053301-00 D SANblade Control iX Firmware Upgrade IS0053301-00 D

4000 SERIES specifications

The Q-Logic 4000 Series represents a significant advancement in storage networking solutions, particularly designed to meet the high demands of modern data centers. As businesses continue to accumulate vast amounts of data, the need for efficient, high-performance storage solutions becomes more pronounced. This series shines in delivering flexibility, scalability, and high availability.

One of the standout features of the Q-Logic 4000 Series is its support for advanced protocols such as Fibre Channel and Ethernet. This versatile capability enables seamless integration within diverse environments, whether organizations are operating on traditional storage area networks (SANs) or transitioning to more cost-effective, high-speed Ethernet-based storage solutions. The flexibility in protocol support allows businesses to tailor their infrastructure to their specific needs without being tied to a single technology.

The Q-Logic 4000 Series also boasts a robust performance, featuring high IOPS (Input/Output Operations Per Second) capabilities that cater to I/O-intensive applications and large-scale virtualized environments. This efficiency is crucial for workloads such as database management, big data analytics, and mission-critical applications. Additionally, the series employs advanced technologies such as hardware offload and flow control mechanisms, resulting in reduced CPU usage and improved overall system performance.

High availability is another critical characteristic of the Q-Logic 4000 Series. The products are engineered with redundancy and failover mechanisms that ensure continuous operation, thereby reducing downtime and bolstering business continuity. Built-in features such as link aggregation and adaptive load balancing further enhance reliability and performance, allowing organizations to maintain optimal operations even amidst traffic fluctuations.

Scalability is a central theme in the design of the Q-Logic 4000 Series. The architecture supports linear scaling, enabling users to grow their networking capabilities in alignment with their expanding data needs. This characteristic is particularly beneficial for companies anticipating growth, as it allows them to invest in the system incrementally.

Security features within the Q-Logic 4000 Series also receive significant attention. The implementation of encryption technologies and secure access protocols ensures that sensitive data remains protected from unauthorized access and cyber threats.

In summary, the Q-Logic 4000 Series positions itself as a cutting-edge solution in the storage networking landscape, combining advanced technologies, high performance, and robust security features. Whether for a growing enterprise or an established data center, these products deliver a compelling solution for modern storage challenges.