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Khoa Pham's Tech Blog » Windows

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Archive for the ‘Windows’ Category

Setup MPIO for EMC VNX Storage

April 23rd, 2015 Comments off

If you use EMC PowerPath, the process is straightforward from EMC. But in most cases, due to the price of EMC PowerPath, we use Microsoft MPIO instead (Which PowerPath uses under the covers)

If using Microsoft’s MPIO, you can use their mpclaim utility from a command line or their GUI for doing all the setup. The following assumes you are using Microsoft MPIO and an EMC VNX storage array. There are only slight variations for other combinations.

  1. Configure hardware for MPIO.
  2. Install Microsoft MPIO.
  3. From a command prompt, issue the command “mpclaim -h” to see the currect storage devices claimed by MS MPIO. With a VNX you should see something like “Vendor 8Product 16″. Looking at the MPIO Devices tab in the GUI will show the same information.
  4. From a command prompt, issue the command “mpclaim -s -d” and you should see that there are no disk present yet, as you haven’t allowed any.
  5. From a command prompt, issue the command “mpclaim -e” to display the vendor product ID string for the connected storage array. Depending on how your VNX is configured, you will see something like this “DGC VRAID”.  There are exactly five (5) spaces after “DGC” and you must have exactly five spaces in the ID.
  6. Now you can add the multipath support for the speicifc IDs you want. Obviously you will want whatever you saw in the previous step, but in case you plan on using some other configurations, you can add everything from the list from above. From a command prompt enter the command “mpclaim -n -i -d “DGC VRAID”. The “-n” switch suppresses the automatic reboot. Repeat that commnd for each all device IDs desired.
  7. Reboot the system.
  8. From a command prompt, issue the command “mpclaim -s -d” and you should see the disks claimed by MPIO on the node. Again, you can use the GUI for all this, too.
  9. Run Disk Management and activate the new disk

 

Categories: Data Center, Windows

Java Application Error – Security Exception

April 28th, 2014 Comments off

I just updated Java to version 7 update 55 and I can’t login to EMC Navisphere anymore. Java V7u55 just decided to stop the local Java apps without even telling you why. I googled it, most website says you have to add the URL to the “Exception Site List” in the Security tab, but guess what, there is no “Exception Site List” any more.

p1

So you will have to do it the “Old school” way, edit file “exception.sites” and add in the URL at

C:\Users\lastname.firstname\AppData\LocalLow\Sun\Java\Deployment\security

Note that AppData directory is hidden.

p2

Categories: Data Center, Windows

Group Policy made easy

October 14th, 2013 Comments off

Fatal error: Uncaught Error: Call to a member function id() on array in /homepages/17/d92238269/htdocs/dkpro/wp-content/plugins/crayon-syntax-highlighter/crayon_formatter.class.php:34 Stack trace: #0 /homepages/17/d92238269/htdocs/dkpro/wp-content/plugins/crayon-syntax-highlighter/crayon_formatter.class.php(537): CrayonFormatter::format_code('', Array, Object(CrayonHighlighter)) #1 [internal function]: CrayonFormatter::delim_to_internal(Array) #2 /homepages/17/d92238269/htdocs/dkpro/wp-content/plugins/crayon-syntax-highlighter/crayon_formatter.class.php(515): preg_replace_callback('#()#msi', 'CrayonFormatter...', 'gpupdate /force') #3 /homepages/17/d92238269/htdocs/dkpro/wp-content/plugins/crayon-syntax-highlighter/crayon_highlighter.class.php(187): CrayonFormatter::format_mixed_code('gpupdate /force', Object(CrayonLang), Object(CrayonHighlighter)) #4 /homepages/17/d92238269/htdocs/dkpro/wp-content/plugins/crayon-syntax-highlighter/crayon_highlighter.class.php(207): CrayonHighlighter->process() #5 /homepages/17/d92238269/ in /homepages/17/d92238269/htdocs/dkpro/wp-content/plugins/crayon-syntax-highlighter/crayon_formatter.class.php on line 34