Hello Guys, I just want to know what are the requirements aside from the storage subsystems hardware in creating device mapper multipath DSM or Hardware Handler. I have just read from the linux symposium document about the implementation of the Linux Multipathing solution that the Device Specific Module allows the ff: a) Specification of kernel resident storage system specific path group initialization b) IO completion filtering c) Message handling Is there any document available on how to implement these specific components? Another Question: How do I test these Hardware Handler in userspace? Thanks and Best Regards, xyber -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel