Updating AIX Virtual SCSI adapter attributes without an outage
Need to update the running attributes of a virtual SCSI adapter on
an AIX system? Try these steps. I want to change value for the vscsi_err_recov attribute
to fast_fail .
I can’t do this if the adapter is busy i.e. has open/available paths to a disk device. #
lsattr -El vscsi2 vscsi_err_recov
delayed_fail
N/A
True vscsi_path_to
0 Virtual
SCSI Path Timeout True #
chdev -l vscsi2 -a vscsi_err_recov=fast_fail Method
error (/usr/lib/methods/chggen):
0514-029 Cannot perform the requested... [More]
Tags:  vscsi cfgmgr gibson chdev aix chris rmpath lspath |
Defining a new Network Install Interface on a NIM master.
OK, so I had
a NIM master with two network interfaces, en0 and en1. The en0 interface was connected
to the 192.168.10.0 network and the en1 interface was connected to the 10.1.1.0 network. When the
master was initially configured, we chose en0 as the primary install interface.
The master could now install NIM clients on the 192.168.10.0 network, without
any additional NIM network configuration. root@nim1 /
# ifconfig –a en0:... [More]
Tags:  new gibson network install nim installation chris interface manager aix |
Convert rootvg JFS file systems to JFS2 with alt_disk_copy
Starting with AIX 6.1 (TL4?), you can use the alt_disk_copy command to convert rootvg
file systems from jfs to jfs2. The man page for the alt_disk_copy command
states the following: -T
Indicates that you want to convert JFS file systems to JFS2 file systems during
the process of recreating the rootvg volume group on target disks. As an example, to clone a running systems rootvg to hdisk2, and convert
the rootvg file systems from JFS to JFS2, you would run the following command: #
alt_disk_copy -T -d hdisk2 Good to know!
Tags:  alt_disk_copy chris convert jfs2 aix gibson jfs |
nmon, AIX and iscsi0
If you have the AIX iSCSI Software Initiator (iscsi0) configured
on your system, you may find that nmon reports some “funny” information under the Disk Adapter (a) and Disk I/O (d) screens,
such as: ┌─topas_nmon──4=Top-by-RAM-use───Host=aix1
Refresh=2 secs───15:09.41──────────────────────────┐ │ Disk-Adapter-I/O ─────────────────────────────────────────────────────────────────────────────────────│ │Name
%busy read
write xfers Disks
Adapter-Type
│ │vscsi1
0.0 ... [More]
Tags:  i/o iscsi iscsi0 aix nmon adapter stats disk |
Is there a way to find on which processor a process is executing?
A question I received this week from a customer. Hi Chris, Is there a way to find on which processor a process is executing?
If I’ve used binprocessor, ps –emo THREAD, would show which processor a
process is bound too. But when that’s not been used, what are the options? The ps command will
only help if we bind a process to a specific CPU. For example, here we can see
that the bootpd process has been
bound (and then un-bound) on processor 3: # bindprocessor -q The available processors are: 0 1 2 3 # bindprocessor 8585302 3 ... [More]
Tags:  chris trace gibson aix curt |
A letter from Pavel Hampl - LPAR2RRD creator.
Interested in paid support for LPAR2RRD tool? Let’s all support Pavel and spread the word! From: Pavel
Hampl < pavel.hampl@cz.ibm.com > Date: 21 July 2011 3:00:19 AM AEST To: undisclosed-recipients:; Subject: LPAR2RRD professional support announcement Hi Everyone, You are receiving that mail because we have been either in touch in regards of LPA2RRD tool about year ago or you are on LPAR2RRD mailing list. I’ve decided to make professional paid support of LPAR2RRD. Here are my reasons which led me to that thought: - I have not... [More]
Tags:  lpar2rrd chris aix gibson |