hardware_handler error with HP MSA1000

["jean Diallo" <diallo.jean@xxxxxxxxx>]

Hi
I have been strugling with an HP MSA1000 for a few weeks now.
I am using the old active/passive firmware.
Here is the device section of my multipath.conf :

devices {
	device {
		vendor 		"COMPAQ"

		product		"MSA1000"
		hardware_handler	"1 hp_sw"
		path_grouping_policy	group_by_prio
		path_checker	hp_sw
 			 		
 	}
}

I am under RHEL5.2 and this is the rpm package of dm-multipath 0.4.7-16.el5.
Here is my /var/log/messages when i start multipathd daemon :
Aug 12 13:48:33 cluster3 kernel: device-mapper: ioctl: error adding target to table
Aug 12 13:48:33 cluster3 kernel: device-mapper: table: 253:19: multipath: unknown hardware handler type
Aug 12 13:48:33 cluster3 kernel: device-mapper: ioctl: error adding target to table
Aug 12 13:48:33 cluster3 kernel: device-mapper: table: 253:19: multipath: unknown hardware handler type
Aug 12 13:48:33 cluster3 kernel: device-mapper: ioctl: error adding target to table
Aug 12 13:48:33 cluster3 kernel: device-mapper: table: 253:19: multipath: unknown hardware handler type
Aug 12 13:48:33 cluster3 kernel: device-mapper: ioctl: error adding target to table
Aug 12 13:48:33 cluster3 kernel: device-mapper: table: 253:19: multipath: unknown hardware handler type
Aug 12 13:48:33 cluster3 kernel: device-mapper: ioctl: error adding target to table
Aug 12 13:48:33 cluster3 kernel: device-mapper: table: 253:19: multipath: unknown hardware handler type
Aug 12 13:48:33 cluster3 kernel: device-mapper: ioctl: error adding target to table
Aug 12 13:48:33 cluster3 kernel: device-mapper: table: 253:19: multipath: unknown hardware handler type
Aug 12 13:48:33 cluster3 kernel: device-mapper: ioctl: error adding target to table
Aug 12 13:48:33 cluster3 multipathd: path checkers start up

If anyone can help, thanks in advance.

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