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Michael_Chubb's avatar
Michael_Chubb
Copper Contributor
Nov 23, 2023

BSOD because of ISCSI, MPIO.sys and duplicate PDO's

Hi to all.

 

I have a problem with my system that I was hoping to get opinions on for potential fixes as am pulling my hair out.

 

Server 2022 with ISCSI connections to a HP Alletra 6000 with MPIO policy set to least queue depth.

 

Every couple of days/weeks/months there is no correlation to how often the server with crash with the .dmp giving the error of 

 

NP_DETECTED_FATAL_ERROR (ca)
PnP encountered a severe error, either as a result of a problem in a driver or
a problem in PnP itself.  The first argument describes the nature of the
problem, the second argument is the address of the PDO.  The other arguments
vary depending on argument 1.
Arguments:
Arg1: 0000000000000001, Duplicate PDO
	A specific instance of a driver has enumerated multiple PDOs with
	identical device id and unique ids.
Arg2: ffff848659439300, Newly reported PDO.
Arg3: ffff8486762350a0, PDO of which it is a duplicate.
Arg4: 0000000000000000

I am unable to work out why this is.

 

It is also worth noting that this server is my Veeam proxy server that will connect to the SAN for snapshots but will not mount the drive with a letter in windows and automount is disabled.

 

Any help anybody is able to give would be greatly appreciated and any needed details I have left off I apologise and am more than happy to provide.

 

EDIT: the faulting image name is 

mpio.sys

and module name is 

FAULTING_MODULE: fffff8031a130000 mpio

Many thanks

Mike

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