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 HP-UX 11i Version 2 Release Notes: HP Integrity Servers and HP Workstations > Chapter 3 Workstation- and Server-Specific Information

Mass Storage Drivers
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The following sections describe mass storage drivers and adapters that are automatically installed.

Fibre Channel Tachlite

In HP-UX 11i v2, the Fibre Channel Tachlite driver supports both the A5158A and A6795A PCI Fiber Channel adapter cards.

Summary of Change

The changes to the Fibre Channel Tachlite driver in HP-UX 11i v2 release include:

  • Interrupt migration

  • Online Addition and Replacement (OLAR) of Fibre Channel apdater cards

Impact

The interrupt migration provides the capability to move individual interrupts allowing the balancing of the systems interrupt load, thereby improving performance.

The OLAR feature enables the addition and/or replacement of Fibre Channel Tachlite adapter cards without shutting down your system. For more information, see “On-line Addition and Replacement (OLAR) of I/O Adapters”.

Compatibility

There are no compatibility issues.

Performance

There are no performance issues

Documentation

There are no documentation changes.

Obsolescence

Not applicable.

SCSI Drivers

The Small Computer System Interface (SCSI) product is delivered as part of each HP-UX 11i v2 operating environment. The SCSI product activates the mass storage stack in HP-UX. It consists of services and a disk class driver that are common layers for all the storage stacks, including Fibre Channel and interface drivers for parallel SCSI cards.

Summary of Change

The SCSI product is changed in HP-UX 11i v2 as follows:

  • The SCSI support is limited to PCI cards only.

  • The new cards supported are: A5149A™ and A5838A™ (SCSI/LAN combination card).

  • The user-level utility, scsictl, includes the new -o option for SCSI cards that are added on-line with the use of OLAR.

  • The SCSI High Voltage Differential (HVD) cards, A4800A, A5159A and A5159B, are not supported in HP-UX 11i v2.

  • The use of Online Addition and Replacement (OLAR) for the A6828A and A6829A cards is supported.

  • The capability to move individual interrupts, allowing the balancing of the systems interrupt load, is provided with interrupt migration.

Impact

The SCSI HVD cards, A4800A, A5159A and A5159B, are not supported in HP-UX 11i v2.

In earlier versions of HP-UX, the parameters of the card were modified through a configuration utility before booting HP-UX. In HP-UX 11i v2, as with previous releases, the parameters for cards on the system can be changed using scsictl -o if necessary after an on-line addition using the configuration tool from the EFI shell.

The PCI Ultra160 SCSI HBA cards, A6828A and A6829A, can be used in multi-initiator setups. A setup with more than one SCSI initiator on the same SCSI bus is considered a multi-initiator setup.

The A5149A, A5150A, and A5838A cards have the following limitations:

Boot Support

It is not possible to boot from these cards on HP Integrity servers. For a list of these servers supported by HP-UX 11i v2, see “Supported Servers and Workstations”.

OLAR Support

Is not available at the time of this release though it may be available at a later date.

SCSI Parameters

Only default parameter settings are supported; no parameter changes are supported.

ServiceGuard Support

It is not possible to use these cards in a ServiceGuard environment on HP Integrity servers.

Multi-initiator Setups

It is not possible to use these cards for multi-initiator setup on HP Integrity servers.

The interrupt migration provides the capability to move individual interrupts allowing the balancing of the systems interrupt load, thereby improving performance.

The OLAR feature enables the addition and/or replacement of the SCSI cards, A6828A and A6829A, without shutting down your system. For more information, see “On-line Addition and Replacement (OLAR) of I/O Adapters”

Compatibility

There are no compatibility issues.

Performance

There are no performance issues.

Documentation

The manpage for scsictl(1M) has been updated to reflect the new -o option.

Obsolescence

With the delivery of HP-UX 11i v2, support for the SCSI HVD card, A5159A, is obsoleted for Itanium-based systems.



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