Solved

iSCSI iniator

Posted on 2013-11-12
15
404 Views
Last Modified: 2014-04-29
Hi,
I have a storage server which i connect my domain controller to using iSCSI. When i first set it up it all went smoothly but recently i have found iSCSI link dropping out. I can log back on to the target but the volumes do not appear exposed by the target. In the past a few reboots seem to have done the trick but that isnt really a very convenient solution. I know the initiator side is working correctly because that machine also connects to another iSCSI target.

I have reassigned the target to the virtual disk on the iSCSI software target and even used IP addresses instead of the IQN but still no difference.

Any suggestions gratefully received
0
Comment
Question by:chrisryan43
  • 6
  • 5
15 Comments
 
LVL 118
ID: 39641970
Software iSCSI is dependent upon good networking, so it you are losing connection with the iSCSI target, do you have issues with the network interface in this computer?
0
 

Author Comment

by:chrisryan43
ID: 39641993
I believe the networking is good (they are physically located next to each other and go through the same switch, pinging reliably etc)

The reason the connection was lost was because the RAID array on the target fell over. HP believe it was a firmware issue on the controller which has now been updated so hopefully shouldnt happen again

I have since rebooted both machines once which didnt resolve the issue and because everything else is working fine i am reluctant to try any more reboots and cause further disruption to the users.

Do you have any other thoughts?

Thanks for your time on this
Chris
0
 
LVL 118

Accepted Solution

by:
Andrew Hancock (VMware vExpert / EE MVE) earned 500 total points
ID: 39642022
Since you had difficulties, establishing this connection, after a storage outage, I would remove it, and setup again.

iSCSI connections, should re-connect correctly and establish themselves, if storage is available.
0
 
LVL 21

Expert Comment

by:RK
ID: 39642067
Hi,

This can be caused when the iSCSI initiator service is not started before the server service.

Is the server service started at the time of issue? if not, start it and see it appears fine. If it works, you need to add a multi-string value for iSCSI  as depends on service  in server service.
0
 

Author Comment

by:chrisryan43
ID: 39645650
Hi,
I had attempted to restart the service but still no joy but i  had some windows updates to apply so gave the server a restart and still nothing. I'm nervous about doing too much on the server side in case i inadvertently erase the RAID. I'm currently in the process of backing everything up elsewhere so that i can play a bit more
0
 

Author Comment

by:chrisryan43
ID: 39647439
Hi,

So this is where i am at.....

I created a new 'Test' virtual disk on the storage server and this then connected fine with the iSCSI initiator. So i then deleted the virtual disk for the one i am having issues with (just within iSCSI software target - not the .vhd file). I also deleted the cbm file just  in case it helped. I then reimported the vhd file back into the software target and it still wont be be seen by the iSCSI initiator. The virtual disk mounts locally fine so i am happy that the file system is  all ok. I am really starting to run out of ideas now
0
Best Practices: Disaster Recovery Testing

Besides backup, any IT division should have a disaster recovery plan. You will find a few tips below relating to the development of such a plan and to what issues one should pay special attention in the course of backup planning.

 
LVL 118
ID: 39647445
I would escalate a support call to Microsoft on this issue.
0
 

Author Comment

by:chrisryan43
ID: 39647452
*UPDATE* - i just realised that i hadn't added the domain controller back as a device target after reimporting the virtual disk. I have now done it and all is  working. So the delete/import of  the virtual disk (and deleting the cbm file) seems to have fixed it.

Thanks for your time and suggestions on this
0
 
LVL 118
ID: 39647464
Glad it's all working again.
0
 

Author Comment

by:chrisryan43
ID: 40006125
I've requested that this question be closed as follows:

Accepted answer: 0 points for chrisryan43's comment #a39647452

for the following reason:

Closing the question
0
 
LVL 118
ID: 40006126
If my Answers have aided you in this solution, please assign points.
0
 
LVL 118
ID: 40028914
3. Accept http:#a39642022
0

Featured Post

What is SQL Server and how does it work?

The purpose of this paper is to provide you background on SQL Server. It’s your self-study guide for learning fundamentals. It includes both the history of SQL and its technical basics. Concepts and definitions will form the solid foundation of your future DBA expertise.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

When converting a physical machine to a virtual machine using VMware vCenter Converter Standalone or vCenter Converter Enterprise, if an adapter type is not selected during the initial customization the resulting virtual machine may contain an IDE d…
Issue: One Windows 2008 R2 64bit server on the network unable to connect to a buffalo Device (Linkstation) with firmware version 1.56. There are a total of four servers on the network this being one of them. Troubleshooting Steps: Connect via h…
Teach the user how to configure vSphere clusters to support the VMware FT feature Open vSphere Web Client: Verify vSphere HA is enabled: Verify netowrking for vMotion and FT Logging is in place or create it: Turn On FT for a virtual machine: Verify …
This video shows you how to use a vSphere client to connect to your ESX host as the root user. Demonstrates the basic connection of bypassing certification set up. Demonstrates how to access the traditional view to begin managing your virtual mac…

919 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

21 Experts available now in Live!

Get 1:1 Help Now