Can you explain to me 1 thing. As you mentioned, each physical/virtual FC has 2 WWPN. As I check on HMC, I can see the virtual FC assigned to my LPAR has 2 WWPN as screenshot attached.
But when I check on LPAR, I see only 1:
Just one short question: you have posted the (correct) dialog from the HMCs web GUI where both addresses are shown. How about - instead of grepping the output of lscfg - looking at its unfiltered output, hmm? I mean, grep is for filtering information. To filter something you need to understand what is vital and what is not. So, instead of filtering, look at the whole first. What does i.e.
tell you? Do you see the WWPN somewhere, which you see in the HMCs GUI? So, there is your answer.
Quote:
If it's not zoning, I guess we still see the WWPN info on the AIX.
Your guess is correct. The WWPN is - see the explanation above - a property of the adapter and the basis for zoning. So it has to be there prior to any zoning taking place.
Quote:
Originally Posted by vbe
I want to point out the very last paragraph is crucial! as more than 75% of the issues I encounter are related to that paragraph, usually when migrating disk bays or servers in a hurry ( time frame to respect...)
Absolutely. But a lifelong experience as a software developer and a systems administrator has taught me one important lesson:
do it as fast as possible - but not faster!
When you start to sacrifice security or quality or reliability for getting "finished" it is time to call it quits. Step back one step, question your objectives and the objectives of the project and ask yourself how to GLOBALLY do the most good. Globally - as opposed to locally - is important here: if you finish a 3-day schedule in 2 days but in a way so that it breaks down in short time and needs another 3-day overhaul you haven't sped up the process, but in fact slowed it down. Knowing that, i take 3 days if it takes 3 days and to hell with some unrealistic promise some non-technical dimwit made just because it looked good on his spreadsheet. If he think it can be done in two days - show me. Chances are he can't.
I remember well the opportunity when i heard Seamour Cray - from Cray Computers fame - talking about developing. It was about the lines of ...you go by taking one step after the other. If you try to take several steps at once you just hop up and down rapidly but in fact get nowhere. To this i have nothing to add.
I hope this helps.
bakunin
Moderator's Comments:
PS: As this thread is dealing with AIX specifics i transfer it to the AIX board.
Hi Bakunin,
Here the full details. So I don't see any WWPN elsewhere.
And how about this quote and the rest you want to emphasize full details are very crucial???
Here the full details. So I don't see any WWPN elsewhere.
Well, i have to apologize. Having no AIX system to check at hand i was relying on memory and i thought the other WWPN would be displayed in the Z8 field. Seeing the whole display now i see that it is only the first WWPN.
You may be lucky using the fcstat command, because it will always show the active WWPN, which may or may not be the first one, depending on LPM status.
A sure-fire way to get both WWPNs is to query the HMC, either by GUI as you did or by commandline:
Quote:
Originally Posted by Phat
And how about this quote and the rest you want to emphasize full details are very crucial???
Quote:
]Absolutely. But a lifelong experience as a software developer and a systems administrator has taught me one important lesson:
First off: please, when you quote other peoples text, use QUOTE-tags, not CODE-tags. The formatting is different and formatting flow text as code (that is, among other things: without line breaks) is ridiculous.
What i meant is that you can speed up things only to a point: it takes 9 months to deliver a (working) baby and if you try to "optimize" or "streamline" (or whatever the newspeak of quacks with a degree in business is today) the process you are likely not to end up with a baby delivered sooner but an abomination delivered later. Corollary: managers subjugating the mother to do daily status reports won't help either.
I try to be as circumspect as possible when doing crucial things (and configuring a system that should then run for some years is crucial) and under pressure i can speed up a bit. But once this cutting corners is endangering the success of the whole operation i usually stop and just make clear that ridiculous timelines set by clueless managers based on the size of their expected bonus is not relevant for me - and is not for my work either. If someone happens to have the "idea" (for lack of a more fitting word) to have a server installed and configured by noon at 11:59 - he is just going to be gravely disappointed. An he not having the server he expected by the time he phantasized he'd have it doesn't make my coffee tasting less good or my sleep being any less deep. As a technician i am paid for doing technics - if you need a wonder hire the god of your choice.
I hope this helps.
bakunin
ADDENDUM: in my introduction to FC networks i forgot to mention that new adapters need to be "logged in" to the network before they can be used and their WWPNs are recognised. If you have an LPAR without NPIV you can simply start the system and the FC adapters will be logged in automatically. But with NPIV and a boot disk from the SAN directly (and not via VIOS as a SCSI-disk) you need to take this into account when discovering the disks for the first time.
From the HMC, I can list all the wwpn of lpar as below
Quote:
ADDENDUM: in my introduction to FC networks i forgot to mention that new adapters need to be "logged in" to the network before they can be used and their WWPNs are recognised. If you have an LPAR without NPIV you can simply start the system and the FC adapters will be logged in automatically. But with NPIV and a boot disk from the SAN directly (and not via VIOS as a SCSI-disk) you need to take this into account when discovering the disks for the first time.
We use VIOS and the boot disk from the SAN directly. From VIOS, I can see the fcs is logged already
So strange we can see only 1 WWPN. Or only this WWPN is used?
--- Post updated at 08:56 AM ---
I suspect it uses the zoning with type active-standby
So strange we can see only 1 WWPN. Or only this WWPN is used?
I suspect it uses the zoning with type active-standby
Yes, i would suspect the zoning too. You should investigate with the storage guy, especially if he has zoned both of the WWPNs on both of the virtual adapters. They often think that - one cable one WWPN - one of them is enough.
Only one of the two WWPNs is used - at a time. The second is needed for LPM: while the one WWPN is still used on the source system the second one is used on the target system and once the LPM move is complete the original WWPN is not used any more until you initiate another LPM move.
Seem that by default, each virtual FC adapter is created but only 1 WWPN is active, and the other is used for LPM.
0: is not logged.
1: is logged or active
2: unknown.
Even I try to login the port ( on test AIX), I still see the same WWPN, not more WWPN ( the number of FC card is not increased, still 4) --- Post updated at 10:29 AM ---
I guess this is the behavior of power machine, as only 1 WWPN is active and recognized on the OS side.
If we login the inactive ports, the zoning on SAN switch will see the second WWPN according to the article above.
I will verify with the storage guy tomorrow about this and update.
--- Post updated at 10:32 AM ---
1 question, LPM is used to migrate the AIX from one power host to another power host? Like migrate VM on VMware?
--- Post updated at 10:37 AM ---
Quote:
Yes, i would suspect the zoning too. You should investigate with the storage guy, especially if he has zoned both of the WWPNs on both of the virtual adapters. They often think that - one cable one WWPN - one of them is enough.
Yes, I'm not so clear after all but this is still in the checklist.
Hi,
One of my Netra 240 went into hung state and I had to reboot it. I powered it off and tried booting it again but unsuccessful. It is not connected to SAN and have local disks. Not able to boot in failsafe mode too.
There are two disks of 72GB, both are mirrored in SVM. It complains about... (5 Replies)
Hi
I had power issue that affected a server, in which I had power ON the server SPARC T1-B3 running solaris 10.
After power on the system stops at ok prompt, them I issued the following commands:
{0} ok setenv auto-boot? false
auto-boot? = false
{0} ok reset-all
SPARC T3-1B,... (10 Replies)
Hello,
Just a quick question
Usually from a PSERIES if you want to connect to IBM SAN Storage
you connect the IBM SAN Storage through a SAN Switch
something like this
---
however my question
Can you connect
from Pseries directly to San Storage without SAN Switch
what would be... (8 Replies)
We will be buying new Xeon E5-based servers for our datacenter and were wondering which Fibre Channel host bus adapters we should select for these. The choices are Emulex or QLogic (8Gb FC HBAs). Anybody have any recommendations on which is the better choice?
Thanks in advance. (1 Reply)
hi
i have two aix servers and I was asked to setup a secure shell between the two servers using the sybase user. Can any one let me know how to do this (2 Replies)
Hi ,
I have wrtitten a C program that issues USCSICMD ioctl call to the tape devices attached on solaris sparc 10. I was able to get the required information from all SCSI tape devices attached using the utility. But, whenever it is run on FC attached tape drives , the program returns an error... (0 Replies)
Hello,
Searched in all IBM Redbooks and on the internet and couldn't find anything about the new feature of POWER 6 which Virtual Fibre ( Fiber ) channel adapter.
It is similar to virtual scsi adapter.
In my client partition I created the virtual Fibre Adapter mapped it with the VIO... (1 Reply)
Hello,
I have two systems that are being prepared to be SAN attached ..
can anyone tell me any specific checks I should perform prior to the cards being installed...
I am aware of firmware / OS level and relevant drivers, is there anything else?
thanks
Chris. (8 Replies)
Want to configure IBM raid strorage but the aix 5L cds do not have the drivers for the fibre channels. The machine is RS/6000. I have gone to IBM downlaodable sites but i can't find the drivers? help pliz:mad: (4 Replies)