I usually get this error if there is a mismatch in the kernel version
of the OS and the device-handler.
You could get the module info of device handler with "modinfo module-name".
Could you please post "uname -a" and "modinfo module-name".
Also, are you trying to rebuild the device-handler or the kernel?
Take care,
Pradipmaya.
2008/8/12 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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