Reading Diag Report

# diag : Command to perform Server Diagnostics.

# /usr/lpp/diagnostics/bin/diagrpt -s ##### : Command to read the diagnostics Report.

# /usr/lpp/diagnostics/bin/diagrpt -o : Command to read the last diagnostics Report. 

 

Hardware Diagnostics on AIX

# diag -a : Command to perform Hardware Diagnostics on the server.


In AIX 5.2 and higher, missing resources (indicated by an 'M') and missing resource paths (indicated by a 'P') are integrated into the diagnostic resource selection list.

Scanning New LUN

Linux:

# echo "- - -" > /sys/class/scsi_host/host#/scan

host# : Refers to which HBA (WWN ) neew LUN is assigned.

HPUX:

# insf

# ioscan -funC disk

AIX:

# cfgmgr

# lsdev -Cc disk

Hardware Information

Linux: 

# dmesg

# lspci

# dmidecode

HPUX : 

# dmesg

# ioscan

AIX: 

# lsdev -PH/CH

# lscfg -vp

Kernel Tuning in HPUX

The below post will help in viewing and managing the kernel parameters.

/stand/vmunix : Default Kernel Location.

# kconfig -v : Command shows the current kernel path, when was it updated and last configuration.

# kctune nproc=5200 : Command to change the kernel parameter.

# kctune -b yes nproc=5200 : Same as above which will automatically take kernel backup configuration.

# kctune -b no nproc=5200 : Same as above but will not take kernel backup configuration.

# kconfig -H : This will discard any changes to happen at the next reboot to the kernel. So the kernel will boot with the current running configuration.

# kcmodule : List all the kernel modules.

# kcmodule -v <Module_Name> : List information about that module.

# kcpath : Shows the name of the current path.

# kcusage -d nproc : Command shows the usage of nproc on hourly basis.