Q-Logic 4000 SERIES manual System Registry Parameters, MaximumSGList

Models: 4000 SERIES

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3 – Windows 2000 Driver Installation System Registry Parameters

NOTE: You do not have to use the Device Manager or the Hardware Wizard to uninstall the QLA40xx HBA. After you have removed the QLA40xx HBA and restarted your computer, Windows 2000 recognizes that it has been removed.

3.6

System Registry Parameters

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

MaximumSGList

NumberofRequests

3.6.1

MaximumSGList

Windows 2000 includes enhanced scatter/gather list support for doing large SCSI I/O transfers. Windows 2000 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:0x41.

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.

IS0053301-00 D

3-5

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Q-Logic 4000 SERIES manual System Registry Parameters, Double-clickMaximumSGListREGDWORD0x41

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.