UNSOLVED
Error Stats counter in powermt display
I get a lot of complaints from the db/apps team that they are seeing scsi errors, performance and other I/O related issues on the host and they feel its got somthing to do with the Error Stats counter in powermt display.
I have been seeing a lot of hosts wherin the "Stats Errors" colunmn in powermt display is non zero. I understand that this is the total number of times any logical I/O paths on this bus transitioned from alive to dead. This is always equal to or less than the total number of HBA I/O path errors. It is cleared at boot time
or when powermt restore executes.
The troubleshooring steps that i normally take is:
1) Check if the errors are seen on all the luns on a particular FA / HBA.
2) Check if their are errors reported by other hosts connected to same FA.
3) Check for any link issue on the switch port ( logging log--cisco environment)
4) Host event log.
What I wanted to know is "Is their any any way by which I can know when the error counter was incremented (I/O paths on this bus transitioned from alive to dead) thought any powermt command or their any powermt logs that I can check to determine when it occred or to detremine it is just a stale entry.
Also please let me know Is their anything else that I need to check apart from the above listed steps.
We are running PowerPath (c) Version 4.3.1 (build 40).
Storage class = Symmetrix
==============================================================================
----------- Storage System --------------- -- I/O Paths -- --- Stats ---
ID Interface Wt_Q Total Dead Q-IOs Errors
==============================================================================
000xxxxxxxxx FA 9bA 256 16 0 1 16
000xxxxxxxxx FA 8bB 256 16 0 1 16
I have been seeing a lot of hosts wherin the "Stats Errors" colunmn in powermt display is non zero. I understand that this is the total number of times any logical I/O paths on this bus transitioned from alive to dead. This is always equal to or less than the total number of HBA I/O path errors. It is cleared at boot time
or when powermt restore executes.
The troubleshooring steps that i normally take is:
1) Check if the errors are seen on all the luns on a particular FA / HBA.
2) Check if their are errors reported by other hosts connected to same FA.
3) Check for any link issue on the switch port ( logging log--cisco environment)
4) Host event log.
What I wanted to know is "Is their any any way by which I can know when the error counter was incremented (I/O paths on this bus transitioned from alive to dead) thought any powermt command or their any powermt logs that I can check to determine when it occred or to detremine it is just a stale entry.
Also please let me know Is their anything else that I need to check apart from the above listed steps.
We are running PowerPath (c) Version 4.3.1 (build 40).
Storage class = Symmetrix
==============================================================================
----------- Storage System --------------- -- I/O Paths -- --- Stats ---
ID Interface Wt_Q Total Dead Q-IOs Errors
==============================================================================
000xxxxxxxxx FA 9bA 256 16 0 1 16
000xxxxxxxxx FA 8bB 256 16 0 1 16
