SAN disk failure

hi all,
have a solaris 9 OS and a SAN disk which used to work fine is not getting picked up by my machine. can anyone point out things to check in order to troubleshoot this ??

thanks in advance.

Try and reboot -- -r or when this is not possible a devfsadm. Maybe a cfgadm might help. When all of this isn't successfull, install the latest san_foundation available for you os.

what have you issued to determine it is not being picked up by the server?

User also needs to remove the driver's entry in the corresponding sd.conf, st.conf, and ses.conf file (i.e., parent="qla2x00"...), and populate the file (i.e., sd.conf) with the appropriate entries -- the machine needs to be rebooted to take effect.