7.5.10 Handling device failures on a shared disk (during hot standby processing) (using SCSI reservation for shared disk)
If an I/O error occurs when the standby server switches over to the active system on the device specified in the scsi_device or dmmp_device operand in the server environment definition, HA Monitor issues the KAMN725-W and KAMN726-E messages and hot standby processing fails. Take appropriate action by referencing 7.5.8 Handling device failures on a shared disk (while the active server is terminating) (using SCSI reservation for shared disk).
However, in a redundant configuration with multipath software, HA Monitor issues the KAMN726-E message only when a failure has occurred on all paths to the same shared disk. If the KAMN725-W message was issued but the KAMN726-E message was not issued, take appropriate action by referencing 7.5.7 Handling device failures on a shared disk (while the active server is running) (using SCSI reservation for shared disk).
Note that when hot standby processing is performed, the following message might be output to the syslog file: kernel: sd x:x:x:x: reservation conflict (x is a number; the message might differ depending on the OS version).
This means that the active server has obtained a SCSI reservation to protect the disk. This is a normal operation and there is no need to take any action.