[All Linux Operating Systems] The multipath command can return errors that indicate only that there are failed paths.
Note: The following information provides an example of how multipath errors are displayed in Linux 6.2; other versions of Linux will present multipath errors differently, Review your operating system documentation for information on error handling.
If paths are in a failed state, the
multipath command for returns the following error messages:
multipath -ll 2000b08005c001259
9:0:0:3: sg_io failed status 0x8 0x1 0x0 0x0
9:0:0:3: Unable to get INQUIRY vpd 1 page 0x0.
error calling out /sbin/scsi_id -g -u -s /block/sdaf
8:0:0:3: sg_io failed status 0x8 0x1 0x0 0x0
These error messages indicate only that there are failed paths in the multipath device map. The multipath device map shows paths that are failed and active, and
sg_io failed refers to failed paths. These errors indicate that the system is responding correctly.
You must fix the failed paths or if these errors occur during failover testing, recognize that this is normal and expected Linux multipath behavior.
Note: The multipath command can be invoked automatically by the system at various times, so it is possible for messages like these to be seen whenever paths are in an unusual state, such as during dynamic reconfiguration.