PowerVM: network outage during fallback in SEA load sharing environment

Problem summary

• In a dual VIOS setup where SEA is configured in load sharing
  mode and backup SEA is created over etherchannel in IEEE802.3d
  mode. Rebooting backup VIOS will result in VIO client
  communication loss for  30 seconds.

TSM: Why are backups going to tape instead of disk

Technote (troubleshooting)

Problem(Abstract)

Tivoli Storage Manager TSM Client backups and/or archives may go to a tape pool although the management class used sends data to a disk pool

Cause

DISK pool is not available or does not have free space or data size exceeds threshold.

Resolving the problem

DS8000: Code (Firmware) Recommendation

DS8000 Code Recommendation can be found here:
http://www-01.ibm.com/support/docview.wss?uid=ssg1S1004456&myns=s028&mynp=OCST8NCA&mynp=OCSTXN8P&mynp=OCSTUVMB&mynp=OCHW2C2&mynp=OCHW2B2&mync=E

Power: PowerVM 2.2.3 enhancement announcement

IBM PowerVM version 2.2.3 has been enhanced with the following:

AIX: How to list disk size using getconf

Disk size in AIX can be listed by this command:

for i in `lsdev -Cc disk | awk '{print $1}'`
do
echo "$i \c"
getconf DISK_SIZE /dev/$i
done

TSM: Basic - Extended Edition: drive and storage slots limit

For IBM Tivoli Storage Manager version 5.4 and later, to use a library with greater than 4 drives or greater than 48 storage slots, IBM Tivoli Storage Manager Extended Edition is required.

AIX: migratepv 0516-404 allocp: This system cannot fulfill the allocation request

I have faced issue with migratepv command.
I wanted to migrate PPs from hdisk3 to hdisk2 in same scalable volume group.
Command has failed even there were enough PPs on hdisk2.


migratepv hdisk3 hdisk2
0516-404 allocp: This system cannot fulfill the allocation request.
        There are not enough free partitions or not enough physical volumes
        to keep strictness and satisfy allocation requests.  The command
        should be retried with different allocation characteristics.
0516-132 lmigratelv: Incorrect entry in partition map file.
0516-134 lmigratelv: Received: 00f73e7044ccd502 110

0516-136 lmigratelv: Error reading input map.
0516-812 migratepv: Warning, migratepv did not completely succeed;
        all physical partitions have not been moved off the PV.

I had to run reorgvg to fix this issue.
It seems to be a bug in LVM because I can't see any reason of described behavior.

TSM: Formatting select command output to return in table format

How to format output as table from select command in TSM?

You can find "how to" in IBM technote bellow:
http://www-01.ibm.com/support/docview.wss?uid=swg21502715

AIX: difference between df and du

Why Numbers from "du -s" and "df" disagree / differ?

Answer can be found on these websites:

IBM Technote:
http://www-01.ibm.com/support/docview.wss?uid=isg3T1000401

Another blog:
http://lokams.blogspot.cz/2008/03/why-is-difference-between-du-and-df.html

Windows: How to list installed updates in command line using wmic commad

This command can be used to list installed updates / fixes / hotfixes from command line in a windows based system:

wmic qfe list
and you can "grep" string from the output:
wmic qfe list  | findstr "940349"

IBM LTFS Single Drive Edition (SDE) free download

Single Drive Edition of LTFS (Linear Tape File System) is for free and available to download from the IBM Support website: http://www.ibm.com/support/fixcentral
Select:
Storage Systems > Tape Systems > Tape Device Drivers and Software > Linear Tape File System (LTFS)

Downloads are available for Linux, MAC OS and Windows
For supported tape systems and supported Operating Systems see the detailed specifications and overview:
http://www-03.ibm.com/systems/storage/tape/ltfs/specifications.html

IBM Tiered storage for big data: GPFS & LTFS

Interesting article about BigData and integration of GPFS and LTFS
http://www.zurich.ibm.com/sto/systems/bigdata.html

TSM: IBM Tivoli Storage Manager V5.5 End of Support EOS 04/30/2014

Software withdrawal and service discontinuance (EOS): IBM Tivoli and IBM Security selected products
IBM United States Withdrawal Announcement 913-063
April 9, 2013
5608-ISM  IBM Tivoli Storage Manager V5.5                                04/30/2014
5608-ISX  IBM Tivoli Storage Manager Extended Edition V5.5      04/30/2014

Source:
http://www-01.ibm.com/common/ssi/cgi-bin/ssialias?subtype=ca&infotype=an&appname=iSource&supplier=897&letternum=ENUS913-063#h2-wprodx
http://www-01.ibm.com/support/docview.wss?uid=swg21635108&lnk=uctug_tivoli_nwsltr_TSM

TSM: PERFORM LIBACTION new command which defines and delete TSM libraries containing large number of drives in TSM server 6.3

New command “PERFORM LIBACTION” has been introduced in TSM server version 6.3.

This command defines and deletes TSM libraries containing large number of drives.
Valid for library type VTL and SCSI.

More information about syntax can be found here:
http://pic.dhe.ibm.com/infocenter/tsminfo/v6r3/index.jsp?topic=%2Fcom.ibm.itsm.srv.ref.doc%2Fr_cmd_libaction_perform.html

TSM: Upgrade recommendations for TSM V6 server

How-to can be found here:
http://www-01.ibm.com/support/docview.wss?uid=swg21508619&myns=swgtiv&mynp=OCSSGSG7&mync=E