To troubleshoot storage management problems related to Solaris Volume Manager, you need to do the following:
Have root privilege
Have a current backup of all data
You should have the following information on hand when you troubleshoot Solaris Volume Manager problems:
Output from the metadb command.
Output from the metastat command.
Output from the metastat -p command.
Backup copy of the /etc/vfstab file.
Backup copy of the /etc/lvm/mddb.cf file.
Disk partition information, from the prtvtoc command (SPARCTM systems) or the fdisk command (IA–based systems)
Solaris patches installed
Solaris Volume Manager patches installed
Any time you update your Solaris Volume Manager configuration, or make other storage or operating environment-related changes to your system, generate fresh copies of this configuration information. You could also generate this information automatically with a cron job.