Category Archives: AIX

How to check AIX Edition

Posted on November 5, 2015 by UNIX Admin

IBM AIX has a 3 Edition (Standard, Express, Enterprise) and you can check the installed edition on you server by the following command: /usr/sbin/chedition -l and you can check the difference between each edition from the following Link: http://www-03.ibm.com/systems/power/software/aix/v61/editions.html

Reset Resources for InActive Lpars

Posted on September 15, 2015 by UNIX Admin

Some times, when you shutdown LPAR, it’s appear inactive but there is some Cores Allocated to this LPAR and overall the HMC doesn’t see the Free cores. so, here is the solution for this issue : – First, login to … Continue reading →

remotely eject tap from server

Posted on February 26, 2015 by UNIX Admin

use the following command to remotely eject the tap from a tap device to minimize your time & safe your data: #mt offline it will eject the tap from the default device tap unit “rmt0”.

list mksysb from tap

Posted on February 26, 2015 by UNIX Admin

try this command to list files from a mksysb tap: #lsmksysb the previous command will list from the default tap device “rmt0”. if you have another tap, try the following: #lsmksysb -f /dev/rmt5

rename a device

Posted on February 19, 2015 by UNIX Admin

Use the following command to rename a device: # rendev -l hdisk4 -n hdisk53 where the ‘hdisk4’ is your device and ‘hdisk53’ is the new name. HINT: The device must be free

Error Report Demon

Posted on February 19, 2015 by UNIX Admin

Here are the commands related to error demon in AIX To stop logging run the below command #/usr/lib/errstop To get rid of that log. # rm /var/adm/ras/errlog To restart the daemon, thus creating a new error log

Volume Group Status Area (VGSA)

Posted on February 13, 2015 by UNIX Admin

Information about which PPs that are stale and which PVs are missing within a VG. The LVM and SCSI driver reserves somewhere between 7-10% of the available disk space for LVM maps, etc. Ref: http://www.datadisk.co.uk/html_docs/hp/aix_lvm.htm

Volume Group Descriptor Area (VGDA)

Posted on February 13, 2015 by UNIX Admin

Information about all the LVs and PVs within a VG. The first 64K of a PV is reserved for this area – defined in <sys/bootrecord.h>. The VGDA consists of BOOTRECORD: – first 512 bytes. Allows the Read Only System (ROS) … Continue reading →

Volume Group Characteristics

Posted on February 13, 2015 by UNIX Admin

You can find below the meaning of each parameter on Volume Group Characteristics (the output from lsvg vg command):   Volume Group: Name of Volume Group. VG State: active/partial. Partial indicates that some of the Physical Volumes in the Volume … Continue reading →

en vs et vs ent

Posted on February 9, 2015 by UNIX Admin

most of us has  confused between the network devices en, et & ent, you can read the following to put a limit for this confusion 🙂 : ent: The notation ent is used to specify the hardware adapter. It has … Continue reading →