RHEL 4.4: Unable to detect new size of Fiber Channel attached LUN

hi group,

I have a server running RHEL 4.4 connected a IBM SVC 5.1.xx attached SAN box.

I am able to detect new LUNs.

I fail to scan an existing LUN that has been extended for it's new size.

Does this need another approach, then scanning for a new LUN?

We use device-mapper-multipath.

Kind regards,

Jan Gerrit Kootstra