Installation guide

4.3.2 EISA Configuration Utility Revision Requirements
For Tru64 UNIX Version 4.0F and its software supplements, the supported
version of the EISA Configuration Utility (ECU) is Version 1.10 or higher.
If your system is configured with an EISA bus, you should update the ECU
to this supported version.
4.3.3 Open3D Support
Consult the Open3D Software Product Description (SPD) before installing
Open3D to ensure that this layered product is supported on your system.
Installing Open3D on systems not supported by the Open3D layered product
can leave your system in an unusable state.
4.3.4 Opening a Write-Protected Tape in Write Mode
The behavior of the open call to a tape device has changed. You can no
longer use write mode to open a write protected tape. The attempt to open
the tape will fail, returning the following message:
EACCES (permission denied).
If an application is written so that it attempts to open the tape device with
O_RDWR when the intention is only to read the tape, the open attempt will
fail. Applications should be changed to open the device with O_RDONLY.
For applications that cannot be changed, use the following command to
obtain the previous behaviour of the open call:
# sysconfig -r cam_tape open_behaviour=0
4.3.5 Restrictions for a Dataless Environment
The Tru64 UNIX Server Extensions includes Dataless Management Services
(DMS) support for installing and operating systems in a dataless
configuration. A server system maintains the root, /usr, and /var file
systems for all client systems. The server maintains one copy of root for
each client. The /usr file system is exported read-only and is shared by all
clients registered to the environment. Each client has their own /var file
system. Dataless clients access the file systems maintained on the server
utilizing NFS.
A dataless environment should be considered in the following scenarios:
• There is a need to reduce the disk space requirements on the client
systems. Local disk space is required only for swap and dump, the
root, usr and var file systems are resident on the server.
• There is a need to have all software and data centrally located on the
server. A dataless client is not designed to support local access to data.
Base System Software Notes 4–15