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AIX server is throwing error.
Hi team,
recently our AIX team has recieved the below error and they wanted us to check that. Could anyone help me to understand this issue.
EMCP_BUS_DEAD
---------------------------------------------------------------------------
LABEL: EMCP_BUS_DEAD
IDENTIFIER: 3767AAFF
Date/Time: Wed Jul 4 16:00:15 GMT 2012
Sequence Number: 761
Machine Id: 000EA46AB400
Node Id: norapdb01
Class: H
Type: INFO
WPAR: Global
Resource Name: unspecified
Resource Class: disk
Resource Type:
Location:
Description
BACK-UP PATH INOPERATIVE
Probable Causes
DISK
SCSI ADAPTER
SCSI CABLE
Failure Causes
DISK
SCSI ADAPTER
CABLE LOOSE OR DEFECTIVE
Recommended Actions
PERFORM PROBLEM DETERMINATION ON SCSI TARGET DEVICE
PERFORM PROBLEM DETERMINATION ON HOST SCSI ADAPTER
REPLACE SCSI CABLE
Detail Data
RESOURCE NAME
dynamox
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July 4th, 2012 11:00
ask them to give you output from "powermt display dev=all" as well as "lsdev -Cc disk"
AnkitMehta
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July 4th, 2012 11:00
What is the multipathing software installed on the host? Is it powerpath?
Can you check if the switch was swapped out?
Jithu9288
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July 4th, 2012 13:00
thank you dynamox. could you tell me what exactly the Q-IOs error mean.
dynamox
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July 4th, 2012 13:00
not a problem anymore but it does tell you that there were errors in the past. It could be anything, physical connectivity issues (HBA going bad, cable going bad, patch panel port going bad), to logical configuration issues (somebody removed a zone, disable the wrong port on the switch). At this point you don't have any dead paths so things are ok but keep watching the error count ..if it's increasing you will need to start troubleshooting different components.
Jithu9288
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July 4th, 2012 13:00
lsdev -cc disk output:
# Output Filename : lsdev_-Cc_disk.txt
# Date : Wed Jul 4 17:44:21 GMT 2012
################################################
hdisk0 Available C6-T1-01 EMC INVISTA FCP Disk
hdisk1 Available C6-T1-01 EMC INVISTA FCP Disk
hdisk2 Available C6-T1-01 EMC INVISTA FCP Disk
hdisk3 Available C6-T1-01 EMC INVISTA FCP Disk
hdisk4 Available C6-T1-01 EMC INVISTA FCP Disk
hdisk5 Available C6-T1-01 EMC INVISTA FCP Disk
hdisk6 Available C6-T1-01 EMC INVISTA FCP Disk
hdisk7 Available C6-T1-01 EMC INVISTA FCP Disk
hdisk8 Available C6-T1-01 EMC INVISTA FCP Disk
hdisk9 Available C6-T1-01 EMC INVISTA FCP Disk
hdisk10 Available C6-T1-01 EMC INVISTA FCP Disk
hdisk11 Available C6-T1-01 EMC INVISTA FCP Disk
hdisk12 Available C6-T1-01 EMC INVISTA FCP Disk
hdisk13 Available C6-T1-01 EMC INVISTA FCP Disk
hdisk14 Available C6-T1-01 EMC INVISTA FCP Disk
hdisk15 Available C6-T1-01 EMC INVISTA FCP Disk
hdisk16 Available C6-T1-01 EMC INVISTA FCP Disk
hdisk17 Available C6-T1-01 EMC INVISTA FCP Disk
hdisk18 Available C8-T1-01 EMC INVISTA FCP Disk
hdisk19 Available C8-T1-01 EMC INVISTA FCP Disk
hdisk20 Available C8-T1-01 EMC INVISTA FCP Disk
hdisk21 Available C8-T1-01 EMC INVISTA FCP Disk
hdisk22 Available C8-T1-01 EMC INVISTA FCP Disk
hdisk23 Available C8-T1-01 EMC INVISTA FCP Disk
hdisk24 Available C8-T1-01 EMC INVISTA FCP Disk
hdisk25 Available C8-T1-01 EMC INVISTA FCP Disk
hdisk26 Available C8-T1-01 EMC INVISTA FCP Disk
hdisk27 Available C8-T1-01 EMC INVISTA FCP Disk
hdisk28 Available C8-T1-01 EMC INVISTA FCP Disk
hdisk29 Available C8-T1-01 EMC INVISTA FCP Disk
hdisk30 Available C8-T1-01 EMC INVISTA FCP Disk
hdisk31 Available C8-T1-01 EMC INVISTA FCP Disk
hdisk32 Available C8-T1-01 EMC INVISTA FCP Disk
hdisk33 Available C8-T1-01 EMC INVISTA FCP Disk
hdisk34 Available C8-T1-01 EMC INVISTA FCP Disk
hdisk35 Available C8-T1-01 EMC INVISTA FCP Disk
hdisk36 Available C6-T1-01 EMC INVISTA FCP Disk
hdisk37 Available C6-T1-01 EMC INVISTA FCP Disk
hdisk38 Available C8-T1-01 EMC INVISTA FCP Disk
hdisk39 Available C8-T1-01 EMC INVISTA FCP Disk
hdiskpower0 Available C6-T1-01 PowerPath Device
hdiskpower1 Available C6-T1-01 PowerPath Device
hdiskpower2 Available C6-T1-01 PowerPath Device
hdiskpower3 Available C6-T1-01 PowerPath Device
hdiskpower4 Available C6-T1-01 PowerPath Device
hdiskpower5 Available C6-T1-01 PowerPath Device
hdiskpower6 Available C6-T1-01 PowerPath Device
hdiskpower7 Available C6-T1-01 PowerPath Device
hdiskpower8 Available C6-T1-01 PowerPath Device
hdiskpower9 Available C6-T1-01 PowerPath Device
dynamox
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July 4th, 2012 13:00
those are not Q-IOs (queued io), that last column is errors (why your system admin complained in the first place)
Jithu9288
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July 4th, 2012 13:00
they have recieved an error "EMCP_BUS_DEAD" for this server and they suspect it is to do something with the devs.
dynamox
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July 4th, 2012 13:00
yes
Jithu9288
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July 4th, 2012 13:00
Hi ankit, how should i check it?
Jithu9288
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July 4th, 2012 13:00
post 7.
also pls check the Q-IOs listed in the powermt output and what exactly it mean? for two paths it shows 3 and 5 respectively. so there were a total of 8 IOs outstanding?
Jithu9288
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July 4th, 2012 13:00
will a powermt restore will reset the errors?
AnkitMehta
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July 4th, 2012 13:00
You can refer to Knowledge Base Article emc252687.
AnkitMehta
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July 4th, 2012 13:00
Sorry buddy, lost you there... What do you want to check? (Please, quote which post you are referring to)
Jithu9288
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July 4th, 2012 13:00
sample powerpath output. Q-IOs it showing 3 and 5 is that a problem?
==============================================================================
--------------- Host --------------- - Stor - -- I/O Path -- -- Stats ---
### HW Path I/O Paths Interf. Mode State Q-IOs Errors
==============================================================================
0 fscsi0 hdisk11 1E active alive 0 3
1 fscsi1 hdisk20 17 active alive 0 0
1 fscsi1 hdisk29 0B active alive 0 0
0 fscsi0 hdisk2 02 active alive 0 5
AnkitMehta
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July 4th, 2012 13:00
What is the status of AIX resetdrives parameter? Its Enabled or Disabled?
Can you check if the devices have dynamic tracking enabled or disabled? That is, dyntrk=yes. or no?