Partitioning System Disks

When Solaris is installed, the system disk is partitioned into slices for root (/), /usr, and other standard file systems. You must change the partition configuration to meet the requirements your volume manager. Use the guidelines in the following sections to allocate disk space accordingly.

File System Slices

See your Solaris documentation for file system sizing guidelines. Sun Cluster imposes no additional requirements for file system slices.

Volume Manager Slices

If you will be using Solstice DiskSuite, set aside a 10 Mbyte slice on the system disk for metadevice state database replicas. See your Solstice DiskSuite documentation for more information about replicas.

If you will be using VxVM, designate a disk for the root disk group (rootdg). See your VERITAS documentation for guidelines and details about creating the rootdg. Refer also to "VERITAS Volume Manager Considerations", for more information.

The Root (/) Slice

The root (/) slice on your local disk must have enough space for the various files and directories as well as space for the device inodes in /devices and symbolic links in /dev.

The root slice also must be large enough to hold the following:

• Solaris system software

• Sun Cluster, some components from your volume management software, and any third-party software packages

• Data space for symbolic links in /dev for the disk units and for volume manager use

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  Note -

  Sun Cluster uses various shell scripts that run as root processes. For this reason, the /.cshrc* and /.profile files for user root should be empty or non-existent on the cluster nodes.

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Your cluster might require a larger root file system if it contains large numbers of disk drives.

If you run out of free space, you must reinstall the operating environment on all cluster nodes to obtain additional free space in the root slice. Make sure at least 20 percent of the total space on the root slice is left free.

The /usr, /var, and /opt Slices

The /usr slice holds the user file system. The /var slice holds the system log files. The /opt slice holds the Sun Cluster and data service software packages. See your Solaris advanced system administration documentation for details about changing the allocation values when installing Solaris software.