How to find the Bad diks

1. Check the syslog (/var/adm/syslog/syslog.log) looking for disk errors.
2. Check the ioscan (ioscan -fnC disk), looking for NO_HW rather than Claimed.
3.  If diaglogd is running then check STM logs (/var/opt/resmon/log/event.log)
4.  Check the volume group to see if the disk is listed and whether there is any problem with it's status (vgdisplay -v | more)
5. Check lvmtab to see if the disk is supposed to be in a volume group (strings /etc/lvmtab | more)