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Lpar Memory Configuration – Guidelines for MaxMem

Guidelines for MaxMem Don’t set MaxMem equal to total amount of server memory for each LPAR. This will waste memory with oversized HPTs. Size MaxMem approximately 25 percent larger than Desired Memory for production LPARs that might require a DLPAR memory addition. For less important LPARs, which could be shutdown for a desired memory increase, […]

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Corrupted transaction log in AIX

we can boot AIX in maintenance mode -> access rootvolume group-> Access this Volume Group and start a shell before mounting file systems # logform -V jfs /dev/hd8 # fsck -y -V jfs /dev/hd1 # fsck -y -V jfs /dev/hd2 # fsck -y -V jfs /dev/hd3 # fsck -y -V jfs /dev/hd4 # fsck -y […]

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Re-creating the boot logical volume on AIX

boot the system in maintenance mode -> Access to the root Volume Group # bosboot -ad /dev/hdiskX  (rebuild  hd5) # Shutdown -Fr  ( important !! All changes need to be written from memory to disk.) The bosboot command requires that boot logical volume (hd5) exists. If we lose the Boot logical Volume (BLV) then we […]

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Add a UDF file system on a DVD-RAM

• Create a UDF file system # udfcreate -d /dev/cd0 • Change the label on a UDF file system # udflabel -d /dev/cd0 -l testdvd • Create a mount point # mkdir /dvddisk • Mount a UDF file system # mount -V udfs -o rw /dev/cd0 /dvddisk • Check a UDF file system # udfcheck […]

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Add a RAM file system on AIX

• Create a RAM disk of 16 MB # mkramdisk 16M /dev/rramdisk0 • Create a JFS file system on this RAM disk # mkfs -V jfs /dev/ramdisk0 mkfs: destroy /dev/ramdisk0 (yes)? y • Create mount point # mkdir /ramdisk • Mount RAM file system # mount -V jfs -o nointegrity /dev/ramdisk0 /ramdisk

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Create user on VIO server with the view rights

1 ) login into VIO Server via padmin 2) change to root : oem_setup_env 3) Create user via smitty * User NAME                                           selim   User ID                                            [203]                                                                                                                                                                                  #   ADMINISTRATIVE USER?                                false                                                                                                                                                                                +   Primary GROUP                                      [staff]                                                                                                                                                                               +   Group SET                                          [staff]                                                                                                                                                                               +   ADMINISTRATIVE GROUPS                              []                                                                                                                                                                                    +   ROLES                                              [ViewOnly]                                                                                                                                                                            +   Another user can […]

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SUDO implementation in AIX

1) download the package from www.perzl.org for example sudo-1.8.8-1.aix5.1.ppc.rpm 2) Install the package via rpm – ivh  sudo-1.8.8-1.aix5.1.ppc.rpm after installation , check the version sudo -V 3)  Edit the configuration file für sudo  vi /etc/sudoers or  directly  # visudo put the user and the right into it. 4)  we can put sudo activities into a […]

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AIX installed/updated Filesets

lslpp -qch | awk -F: ‘ { printf  ” %-14s %-40s %-15s\n ” , $7,$2,$3} ‘ | sort | uniq | sed  ‘ s/70/-70/’ | sort -t  ‘/’  -k 3,3n -k 1,1n -k 2,2n

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Get information about devices in AIX

Table 1. Commands to get information about your devices Command Description lsdev -C -H -F “name status physloc location description” Get the AIX ( if present) and physical location codes. lsdev -Cc disk -F ‘name location physloc’ Get the AIX and physical location codes of all disks. lsdev -Cl hdisk0 -F physloc Get the location […]

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MustGather: Application Server, dmgr, and nodeagent start and stop problems

Collecting data manually, If an Application Server, dmgr or nodeagent is not able to start when issuing the command startServer servername, startManager, or startNode at the command line, or if an Application Server is unable to start or stop using the Network Deployment Administrative console, collect the following documents using one of the tracing methods […]

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