NEC N8800-162F User Manual page 231

In the middle of resync process of RAID, the error message is displayed.
→ The following error message or Call Trace of mdXX.resync process are displayed in
the middle of resync process of RAID. But they are not problem in the system.
kernel: INFO: task mdXX_resync:YYYY blocked for more than 120 seconds.
kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
XX is number for the RAID device (md).
YYYY is process ID number of mdXX_resync process.
Troubleshooting 7-19