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 (SPARC® systems) or the fdisk command (x86–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 system-related changes to your system, generate fresh copies of this configuration information. You could also generate this information automatically with a cron job.