Re-connect to SAN filesystem

So my OV 3.1 environment had some serious issues. The two VM servers kept rebooting repeatedly - I tried booting into rescue mode but I couldn't find any issues with any config files. It just looked like the OVS agent on each server was losing the heartbeat. If I took the agent down (quickly) the server would stay up, but I couldn't correct the problem.
At the same time, the VM Manager server was pegged and I wasn't able to acknowledge any events in the GUI. I also couldn't remove the rebooting servers from the server pool.
So I first decided to rebuild the servers. That was pretty straight-forward. But the screwed up VM manager wouldn't let me do anything with those servers. Rebooting the VM manager server again didn't help. So then I decided to remove and reinstall VM manager. Again, that was pretty straight forward and I used the uuid when reinstalling.
So I was able to recreate the Network and Storage settings in VM manager and it found the server pool filesystem LUN and the storage LUN that has the VMs on it. I created the Server Pool and it used the server pool filesystem LUN OK. But now I can't access the storage LUN. I don't know how to reconnect it to the VM manager. I tried mounting it manually on a VM server just to see if there was something like a config file with a uuid that I could modify, but when I tried that I got the message "*mount.ocfs2: Cluster name is invalid while trying to join the group*". If I try to create a new repository, the LUN doesn't appear in the list of physical disks. I've tried refreshing and rebooting but that doesn't work. So I'm not sure what to do next.

OK, so Oracle Support helped me solve this one. I sent them vmpinfo output and this is what they had me do:
1. On the master server, find the device for the LUN in question (you can use 'multipath -ll') and run:
fsck.ocfs2 /dev/mapper/36090a098805639d7c5fef443bc01f049 <----That's the device on my system, yours will be different
2. Update the cluster id:
tunefs.ocfs2 --update-cluster-stack /dev/mapper/36090a098805639d7c5fef443bc01f049
3. Check that the cluster id has been modified:
mounted.ocfs2 -d
5. In VM Manager, refresh storage. This didn't solve the problem, so I rebooted my VM Servers and the VM Manager at this point but they didn't say I had to. The OV servers were logged out of the iSCSI LUNs at this point, so I ran 'iscsiadm -m node -l' on the OV servers.
6. After I gave Oracle Support a new vmpinfo output, they had me back up my VM Manager database before proceeding further.
7. Support then provided me with a file, setcluster.zip, that I had to unzip under $ORACLE_BASE/ovm-manager-3 (on the OVM server). It created the 'runner' subdirectory and I cd'd to that directory.
8. I ran './setcluster -u admin -p <password>'. I had to choose the LUN in question, then the Server Pool it should belong to, and then confirm that I wanted to attach the repository to the server pool. This made the Repository show up in VM Manager, but it was empty and the LUN wasn't mounted on the OV Servers.
9. Finally, I had to Present the OV servers to the Repository and then Refresh the Repository. Everything showed up in the repository after that - all my VMs, Templates, etc.
10. Oh, one more thing. The Virtual Machine network showed up with a hexadecimal name so I just renamed it and added the VM Servers to it. This allowed my VMs to successfully boot.
I hope this info helps someone if they find themselves in the same situation.
-Rich
Edited by: ratdude on Jul 16, 2012 2:00 PM

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As I found like one zone below, I little bit confused that , if a host having two HBA connected with SAN, should I expect two zones for every Host?
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if u have two independent fabrics between hosts and storage, i think the below confs are recommended.
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HBA1 - port 0 ---------> Fabric A ----------> Storage port ( FAx/CLx )
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Hey everyone,
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955767 wrote:
Hey everyone,
how can I connect via ftp to the xmldb-filesystem ?
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Here are a couple of good Cisco-specific document to start with:
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http://www.cisco.com/go/storage
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Example of modprobe.conf for qla2300:
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alias scsi_hostadapter1 qla2300
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options qla2300 ql2xuseextopts=1
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Other scripts belongs to rc definitely.
The rc scripts wont help as they get kicked off after filesystems mount. Because the filesystems dont mount.Why FS don't mount? Some error message?

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AND
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AND
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I hope that helps,
Trevor
======================================================================================
If my answers have been helpful in any way, please rate accordingly. Thanks!
Message was edited by: Trevor Roberts Jr

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All,
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pnt

Hi MT,
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SANs and inventory collection - ZAM 7.5

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Physical Connectivity from Fabric Interconnect to MDS and Failover please suggest

Dear Team
We have 2 FI and 2 MDS 1 SAN
Currenlty the connectivity is
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2 direct physical Connections from FI-B to MDS2
From MDS 1 connection to SAN Primary controller
From MDS 1 connection to SAN Secondary controller
From MDS 2 connection to SAN primary controller
From MDS 2 connection to SAN Secondary controller
Hope the above connectivty is fine?
we had looked at
http://www.cisco.com/en/US/prod/collateral/ps4159/ps6409/ps5990/white_paper_c11_586100.html (as team always preferred to go via cisco standards)
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Physically your connectivity is good.
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e.g.
           +----+
       +---+    +-----+
       |   |    |     |
       |   |    |     |
       |   |SAN |     |
       | +->----<--+ |
       | |         | |
       | |         | |
   +---+-+-+    +--+--+--+
   |       |    |        |
   |MDS-A |    |MDS-B   |
   +--^-^--+    +---^-^--+
      | |           | |
   +--+-+--+    +---+-+--+
   |       |    |        |
   |UCS-A |    | UCS-B |
   +--+----+    +-----+--+
      |               |
      |               |
VSAN100    +-----+    | VSAN200
      |    |     |    |
      +---->     <----+
           |Blade|
           +-----+
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Each HBA will have a different WWPN, and on the SAN array, each controller will have a WWPN
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Blade WWPN A
Storage WWPN Primary A
Storage WWPN Secondary A
MDS-B, the zoning will be:
Blade WWPN B
Storage WWPN Primary B
Storage WWPN Secondary B
So the configuration is *not* synced between the two MDS devices, but they each have visibility to the blades vHBA device. At the blade level, the Multipathing software on the Operating System will handle any failover.
On the UCS, we would generally use a Port Channel up to the MDS.

Install SAP Application on SAN

Hi,
   We want to install SAP instances (ECC6(DEV,QTY and PROD),Ides & Solution Manager,Portal deveopment and production servers) on windows with sql environment.at present client is alloated below hardware for 4 servers.
Part Description                                                                                Part QTY
HS22, Xeon 4C X5570 95W 2.93GHz/1333MHz/8MB L2, 2x2GB, O/Bay 2.5in SAS                 2
IBM 146 GB 2.5in SFF Slim-HS 15K 6Gbps SAS HDD                                                         2
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Any pointer would be greatly appreciated. Thanks in advance.

N5K can be configured to work as a pure Ethernet, pure FC, or hybrid FC/Ethernet switch support native FC.
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FEX doesn't support native FC !
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2 SAN FABRIC 20Km

Hi Experts
I want to connect two san fabric switch away from each other 20KM using a dedicated fiber in order to replicate san traffic , question is what transceiver on san fabric should i use to terminate the fiber cable coming from the MUX ,is SM or MM or must be an FC Transceiver?
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http://www.cisco.com/en/US/prod/collateral/ps4159/ps6409/ps4358/product_data_sheet09186a00801bc698.html

Regarding San Switch

Dear All,
I have some quaries about the San switch -DS-C9148D-4G48P-K9 and DS-C9148D-8G48P-K9.We need the cable specification for the connectivity between San switch and servers and tape library and SAN to switch.
waiting for your feed-back .
Thanks,
Whead-Ul-Islam

The parts listed are port licenses. The following document may be of value.
Cisco MDS 9000 Family Pluggable Transceivers Data Sheet
http://www/en/US/prod/collateral/ps4159/ps6409/ps4358/product_data_sheet09186a00801bc698.html
Thank You,
Dan Laden

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=================================================================================================
Current workaround is bouncing the oacore services.
Already raised the SR with Oracle.
Oracle support analyst suggesting to upgrade the JDK version from SR2 to SR11 or higher to fix this issue.
Please let us know any other tips to fix this issue.
Regards,
Jagadeesha

Hi,
I have gone through the docs. , not use full. Please find the inline comments for the same.
E-Business Suite Users Experience Intermittent HTTP-500 Errors and Database Connection Errors [ID 1314433.1] -- No solution
R12: Http Server Crashing Frequently With Segmentation Fault (NAS or SAN filesystem) [ID 732857.1] -- Already it is under local file system only.
How to resolve Broken Pipe errors in E-Business Suite R12 ? [ID 1480156.1] -- No solution
Autoconfig is completed wihtout any errors.
I have not chedked the database log file. I will check and update you soon.
Cheers,
Jagadeesha

Re-connect to SAN filesystem

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