Installation guide

interfaces scheduled to be retired in future versions of the operating system.

The following sections provide more information on the major new features

included in Tru64 UNIX Version 4.0F.

1.1 New Hardware Support

Tru64 UNIX Version 4.0F adds support for the following systems:

• Compaq AlphaServer DS20

• Compaq AlphaServer ES40

1.2 Support for Fibre Channel Based Storage

Tru64 UNIX now contains support for Fibre Channel (FC) based storage.

Initially, device support is limited to the KGPSA adapters and HSG80 disk

arrays interconnected via FC switches. The FC devices appear to the system

as normal SCSI devices. As such, Fibre Channel conﬁgurations are bounded

by the SCSI-2 namespace exported via the standard SCSI disk (rz) and tape

(tz) drivers. Many of the conﬁguration restrictions will be removed in a

future release.

As the Fibre Channel address space is much larger and more sparsely-

populated than parallel SCSI, a persistent translation of SCSI target IDs to

FC addresses is necessitated in the device driver for the FC adapter. Refer to

the emx(7) and emx_data.c(4) reference pages for further information on

how this is performed.

For the Version 4.0F release, support for Fibre Channel storage is limited to

data devices only. A Fibre Channel disk device cannot be used for boot,

swap, or dump. Support for these features will appear in a later release.

Cautions

The Version 4.0F installation software does not discern between

Fibre Channel and Parallel SCSI disks. All are presented as

potential install-to devices. If a Fibre Channel disk is selected, a

portion of the installation process will succeed before an ultimate

failure is encountered. This issue will be resolved in an

upcoming release.

Fibre Channel disk devices can be added as secondary swap

devices via fstab(4) or swapon(8). However, doing so

usually places the FC device into the list of potential dump

devices for the system. In the event of a system panic, the FC

disk can be selected as a dump target. If so, the system will

encounter a fatal error and will abort the dump process. This

issue will be resolved in an upcoming release.

1–2 New and Changed Features