Veritas Storage Foundation Release Notes

14
Storage Foundation Release Notes
Changes introduced in 6.0
to shred the data on the disk to minimize the chance that the data is recoverable.
When you specify the disk shred operation, VxVM shreds the entire disk, including
any existing disk labels. After the shred operation, VxVM writes a new empty
label on the disk to prevent the disk from going to the error state. The VxVM shred
operation overwrites all of the addressable blocks with a digital pattern in one,
three, or seven passes.
Caution: All data in the volume will be lost when you shred it. Make sure that the
information has been backed up onto another storage medium and verified, or
that it is no longer needed.
For more information on shredding disks, see the Veritas Storage Foundation
Administrator's Guide.
Creating a volume of maximum size
In previous releases, Veritas Volume Manager provided a two-step approach to
creating a volume of the maximum size. You had to run the vxassist maxsize
command to find the maximum size of the volume to be created with the given
constraints. Then, you had to run the vxassist make command and specify the
volume size as the maximum determined by the vxassist maxsize command.
In this release, you can create a maximum sized volume with a single command.
Specify the vxassist make command with the maxsize keyword. The vxassist
command creates the maximum sized volume possible, taking into consideration
any other allocation attributes that you specify.
Changing VxVM tunables
The vxtune command is used to display or modify the values of Veritas Volume
Manager tunable parameters. In this release, the vxtune command is extended
and enhanced. The vxtune command has the following new functionality:
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manages an extended list of Veritas Volume Manager tunable parameters,
including Veritas Volume Replicator and Cluster Volume Manager tunable
parameters.
provides a template format for tuning parameters. The template feature enables
you to export the list of tunable parameters into a file, modify the values as
necessary, then reload the tunables with an import command.
enhanced command output. The output now displays the current value, the
default value, and whether a reboot is required for the new value to take effect.
Optionally, the output displays a description of the tunable parameters.