How to monitor mi SAN



I´ve to monitor the used space of disks of mi SAN(eva6000(HP)) that is connected to a server “X”.

I used snmp to comunitacate nagios whith X server but there is no information about the used space of the disks of the SAN.

Someone knows how can i do this? snmp,nrpe? any infomation you could give, it would be helpfull.

thank you.