Originally posted by: alaix

Hello

I am building a new lpar on power6 mid range and I have a allocated a RAID controller, a network adapter and a fiber adapter.

I never use SAS before (always use standard SCSI disks). I have no idea what or how to configure this if I have to...
I activated the lpar on SMS mode to check all the IO I have allocated.
When I select list all devices I don't see any hdisk etc.. like we used to see.

I will then install the machine via NIM.
I just want to know how I can see the internal disk and be sure I will be able to install the os via NIM.

Could someone let me know if there are some action to be done or any document IBM I can look at ?

Thanks in advance

Al.
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Originally posted by: Kosala

This might be a trivial question, but have you configured the hardware correctly? When you say power6 mid range I suppose you mean p550 or p560 box. If it is a RAID controller, generally there would be a additional cable to connect to the internal SAS controller (I'm not a hardware guy), and if the connections are not made properly, you might face such issues. In my opinion this could be a hardware misconfig.

I once had a similar issue with a split DASD (5911), where hardware engineer forgot to connect a cable which was required.

Kosala
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Originally posted by: alaix

hello

Thanks for the answer, well it is a p570 (power6).
Now I am concerned do the HW guy need to connect the RAID controller to something...
I Am totally new on Power6.
on Power 5 you just have the SCSI disks and all good...
now don;t know if we need to do additional work...

There are a second lpar on this machine which was already build 2 years ago (not by me wasn;t there).
IBM when they added this new rAID controller last year (still wasn;t there at this time), the aix guy who left now assigned the spare RAID controller to the existing lpar, which wans;t configure on it so I remove it (rmdev the pci#) and allocate it to the new lpar.

Now maybe something needs to be done...

IS there any documentation on Power 6 LPAr creation with SAS disk (which is now default type of internal disks apparently)...

Thanks in advance
Al.
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Originally posted by: Kosala

I recently played with a p6-p560, and the procedure is same as SCSI controllers, at least with the SAS controllers. You should be able to see the diks from SMS menu. Just to check the connectivity, can you see any disks from controller when you attach the controller back to the existing lpar.

Kosala
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Originally posted by: alaix

Hello

When I select 7 display all devices I see at the bottom of the console during the scan information about sas, fiber etc
but then at the end it shows only the network cards
I will test an installation tomorrow via NIM so will see if it can see the disks and perform the install...
Will let you know

Cheers
A;
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Originally posted by: tony.evans

You can only get SMS to show you disks, if those disks have boot images on them.

Since your disks don't, it won't show them to you.

i.e. you're asking SMS to show you devices you can boot from, it knows that there are disks, but it also knows they have no boot logical volumes, and so doesn't present them as valid boot devices.

NIM will show you every disk it can find and ask where you'd like to put the OS, only then will they show up in SMS.
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Originally posted by: alaix

I just tried now to install via nim
I selected on the SMS after the bootp
1 Start Install now with Default Settings
then after continuing choose language etc Installing Base Operating ..._
it said
Error Warning
Not enough disk space selected to contain the operating system
I don;t know what it means, there is a Raid Controller assigned, I have no idea the size of the disks on it (I am hoping they are disks on it - don;t know how I can check that)

I tried to select 2 Change/Show Installation Settings and Install and there are no disks listed

Is there any document chowing install aix on power6 using Raid Controller SAS ?
Thanks again in advance for your help

Cheers
Al
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Originally posted by: alaix

I selected 2 Start Maintenane Mode to see the devices
from the prompt I run the command lsdev |grep sas

then run
$ lsdev -p sas0
ses0 Available
ses1 Available

that's it no hdisk

is there anything that needs to be done ? Do you think IBM HW when he added the Raid Controller he needed to configure it ? As I said never use Raid Controller / sas disk before

thanks in advance for your help :-)

Cheers
Al
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Originally posted by: alaix

I selected 2 Start Maintenane Mode to see the devices
from the prompt I run the command lsdev |grep sas

then run
$ lsdev -p sas0
ses0 Available
ses1 Available

that's it no hdisk

is there anything that needs to be done ? Do you think IBM HW when he added the Raid Controller he needed to configure it ? As I said never use Raid Controller / sas disk before

thanks in advance for your help :-)

Cheers
Al
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Originally posted by: alaix

I connected to Lmited maintenance function
and run some command lsdev and so no disks are configured

Enter 'exit' to return $lsdev |grep sas
sas0 Available 03-08-00 N/Enter 'exit' to return $
sissas0 Available 03-08 N/A

Enter 'exit' to return $lsparent -C -k sas
sas0 Available 03-08-00 N/A

Do you know how to configure the hdisk or normally nothing needs to be done and should show up?

Cheers
al
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Originally posted by: alaix

I have done the installation of the OS via boot on san as I needed to have the OS done and was hoping after the install I would be able to see internal disk or ..., after the os install, I don;t see any disks internal (I see only SAN disks)
# lsdev -p sas0
ses0 Available 03-08-00 SAS Enclosure Services Device
ses1 Available 03-08-00 SAS Enclosure Services Device

I just can;t see any internal disk.
What I am trying to understand if this machine has internal disk and don't know how to see it and be 100% sure there are not disk on the RAID controller...
I am wondering if IBM put a RAID controller is it empty ? without internal disk ?'
I am still trying to udnerstand if there is nothing missing or IBM put an empty raid controller ???

Thanks in advance for your help

Al
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Originally posted by: Kosala

Disclaimer: I'm not a HW guy, so my comment is not countable for anything.

I'm not sure about the RAID controller, so I can't give you a straight answer, but if you tell me the feature code of the RAID controller I might be able to look it up in the SPT and tell you how it can be used.

Generally power6 p570, each CEC has a internal disk backplane (6 slots), which can be divided in to two sections if you connect a SAS controler with split DASD option (for example 5911). And I hear p7 machines have triple split backplanes.

AFAIK, only 5911 can split the internal backplane in to two.

I have no idea how you split the disks in a IO drawer like 8502, I never used disks like that. I think it's clear, without knowing what you have, most of us will be giving blind guesses.

Kosala
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Originally posted by: Kosala

You can find the feature code from the HMC by,

> lshwres -m managed sys name -r io --rsubtype slot

and you have to grep for the card location.

Kosala
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Originally posted by: Kosala

You can find the feature code from the HMC by,

> lshwres -m managed sys name -r io --rsubtype slot

and you have to grep for the card location.

Kosala
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Originally posted by: MadhuSrinivasa

I also had the same issue. What I did was I assigned this SAS adapter to another working LPAR and I was able to see disks on that LPAR. Next i ran  alt_disk_copy on the new SAS disk on that adapter. I removed adapter and re-assigned it back to the LPAR where I was trying install the OS. This time I was able to see disks in SMS mode and able to install OS.

~Madhu

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