This chapter will provide information on administering DM-Multipath on a running system. It includes sections on the following topics:
The Multipath Daemon
Issues with Large Number of LUNs
Issues with queue_if_no_path feature
Multipath Command Output
Multipath Queries with multipath Command
Multipath Command Options
Multipath Queries with dmsetup Command
Troubleshooting with the multipathd Interactive Console
5.1. The Multipath Daemon
If you find you have trouble implementing a multipath configuration, you should ensure that the multipath daemon is running, as described in Chapter 3, Setting Up DM-Multipath. The multipathd daemon must be running in order to use multipathed devices.
