How can you know they are empty disks?As we can think the system is using it as non-LVM disks? And second question is, the multipath should also work for them right? Why after adding to LVM, the multipath starts working?
Look at the quoted output above: the lspv commands lists not only the disks but also to which VG they belong to. i.e. hdisk7, hdisk8, hdisk9, etc. all belong to the volume group vg_3. The two remaining disks, hdisk1 and hdisk8, belong to no VG, hence "None".
There are two possible scenarios: the disks contain a VG but where brought newly to this system and the system doesn't know about the VG. You can use the readvgda command in this case to look if the disk is empty or not and - if it is not - do a "learning import":
The second scenario is that the disks are really empty. In this case you just create a new VG or add them to an existing one.
You can tell the difference by the readvgda-command as described above which reads the "volume group descriptor area" of a disk. But you can also do a
which either reads an already existing PV-ID (physical volume ID) and adds it to the ODM or, if none is there, creates one on the disk. Then you can try the above-mentioned importvg-command which will either fail (if the disk is empty) or succeed.
We are looking at running MPIO for it's redundancy and load balancing benefits. Does anyone know what pieces of software or modules are needed on the VIO server to get load balancing to work. Remember we are using EMC's DMX3500 storage system. We no longer want to use Powerpath. :rolleyes: ... (2 Replies)
Hi
I would like to ask what the benefits are of changing from RDAC to MPIO when connecting to a DS4000 on AIX 5.3? I have heard that IBM MPIO "might" support more than 1 active path to a LUN when connecting to a DS4800 through more than 1 host connection on the same AIX client. I understand that... (8 Replies)
Hi folks,
does anybody have a link to a documentation how to implement native MPIO on AIX? We are using EMC PowerPath and Datacore SanSymphony/Cambex for this so far and I wasn't able to find a good description on that topic. All I know so far is that mkpath, chpath and lspath are used to... (3 Replies)
If PATH is set to ../bin:../sbin:/usr/bin:/usr/local/bin (chunk of path string). Sometime when I try to execute ls command it says ../bin/ls not found. According to my understanding "ls" should be searched in all the path varibales that we set in the PATH varaibale.
Is there any reason for the... (5 Replies)
hello
On Debian Lenny, I first ran apt-get install git-core and then removed it to install from source. The trouble is that when I typed git --version, I am get:
-bash: /usr/bin/git: No such file or directory
of course, git is now in /usr/local/bin
I don't understand why since... (1 Reply)
Hi,
I was trying to uninstall the native MPIO driver on the AIX 6.1 machine we have in our lab and ran into a whole bunch dependent filesets initially. I deleted the disks, fcsX, fscsiX, fcnetX and tried again, but ran into the same error.
Subsequently, I figured out that the OS disks in... (4 Replies)
We have AIX 6.1 system attached to SAN disks (DS4700 and DS8100) thru SVC.
Initially when the system was I forgot to install sddpcm drivers. and wanted to know how can i go with the installation of the sddpcm drivers.
My understandin going thru the manual ... (3 Replies)
Hello,
I logged in to the unix solaris with my user name and then I again logged in with the sudo bash -l command
now when I do echo $PATH
It shows me => /usr/bin:/usr/local/bin:/usr/bin/usr/sbin:/usr/ucb:/usr/local/bin
How do i find out where is this file located for setting the... (3 Replies)
Hi All,
I have followed the steps to set up the public and private keys for SFTP setup. Somehow the SFTP is not working and I get following errors:
==> sftp -v remote_user@remote_host_name_changed
OpenSSH_5.4p1, OpenSSL 0.9.8m 25 Feb 2010
debug1: Reading configuration data... (12 Replies)