Solved

iSCSI is hung on W2K8 server, how to resolve?

Posted on 2011-09-16
3
587 Views
Last Modified: 2012-05-12
This is using MS Windows 2008 R2 server on my system. I've create few iSCSI targets on one of the NAS - Thecus 8800+. On this system, after setting up the iSCSI initiator, I can see all the iSCSI target from NAS, and subsequently mapped one iSCSI target. On disk manager, when I proceed to select to format the iSCSI target, the system hung. I want to resolve this issue without formatting whole system, how to resolve?
0
Comment
Question by:MezzutOzil
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
3 Comments
 
LVL 3

Accepted Solution

by:
OliverLo earned 500 total points
ID: 36553773
Hi MezzutOzil,

I would need more details:
> are you using a iSCSI switch?
> are you using teaming to access to the target?
> did you implement MPIO (multi-path)?

This problem may be network related:
1. disable all TCP offload options
a. From the OS side you have to do that from the command prompt:
netsh int tcp set global rss=disabled chimney=disabled autotuninglevel=disabled
b. From the NIC side you have to do that from the NIC properties (or from management console such as BACS from broadcom). I would suggest to disable all form of offloading including the iSCSI offload engine.
2. decrease the MTU on the initiator NICs, target NICs and on the iSCSI switches
By decreasing the MTU you ensure that the network switches are able to handle this type of traffic.
To ensure you are using the basic MTU packet size of 1500, please disable Jumbo frame option in your NIC options on the initiator and on the target. Certain switches won't support data packet with maximal size.
3. If you have teaming enabled then disable it and check if you can format the remote disk.

Let me know if it works.

0
 

Author Comment

by:MezzutOzil
ID: 36567362
Hi,

No matter what method I tried, I still can't solve the problem. At the end, formatting the system and it resolved...
0
 

Author Closing Comment

by:MezzutOzil
ID: 36597046
ok
0

Featured Post

Edgartown IT Case Study

Learn about Edgartown's quest to ensure the safety and security of the entire town's employee and citizen data. Read the case study!

Question has a verified solution.

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

I was asked if I could set up a fax machine so that incoming faxes were delivered to people's Exchange inboxes and so that they could send faxes from their desktops without needing to print the document first.  I knew it was possible but I had no id…
New Windows 7 Installations take days for Windows-Updates to show up and install. This can easily be fixed. I have finally decided to write an article because this seems to get asked several times a day lately. This Article and the Links apply to…
This tutorial will walk an individual through locating and launching the BEUtility application and how to execute it on the appropriate database. Log onto the server running the Backup Exec database. In a larger environment, this would generally be …
This tutorial will walk an individual through locating and launching the BEUtility application to properly change the service account username and\or password in situation where it may be necessary or where the password has been inadvertently change…

732 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