Tuesday, November 3, 2015

FAN making loud noise on DL 380p G8


Good day All,

Welcome back!!! We have a HP server in remote location which started to make loud noise..even though the Server was stable.

We opened a case with Vendor following troubleshooting steps was done

1. Asked us to update the Firmware drivers and we used June HP SPP
2. Still the same issue, so replace System Board same issue still no luck,
3.Suggested to upgrade to Oct HP SPP still same issue
4. We decided to come with 2 plans , replace again System Board,Fan if still issue then start pulling out the PCI cards each one at a time and test the Fan.

Well guess what after replacing the System Board the issue got fixed, now the big question is we did the same in Step 2 why it didn't fix the issue that time..
Vendor didn't have any answers but our thoughts is that usually System Board sit in warehouse for quite sometime and when then come they come with no update Firmware or drivers or it was not been tested before..

Hope this helps someone!!!!

Monday, November 2, 2015

Robocopy to copy 20 TB of data from NETAPP to Windows 2012R2 File Server cluster

Good day All,

Welcome back!!! one of my friend called me up the other day and he was saying that he needed help on Robocopy and guidance to move 30 TB of data from NETAPP to EMC Storgae,

Well i thought why are not do a blog on my experience and probably it will be helpful for someone.
Even though i was moving the data from NetApp to Windows 2012R2 File Server cluster the process should be the same.
Before i proceed the usually Cut over process and steps, lets dig little bit on what all attributes i used in order to achieve this.. this is my Robocopy.bat file.


ROBOCOPY /e /xj /ZB /r:2 /w:5 /LOG+:"C:\robo\Log.txt" /it /purge /copyall "\\Source IP\Source_Share" "\\Destiantion Server IP\destination_share"

@Echo Copying Complete
Pause


/E :: copy subdirectories, including Empty ones
/XJ :: eXclude Junction points. (normally included by default)
/ZB :: use restartable mode; if access denied use Backup mode
/R:n :: number of Retries on failed copies
/W:n :: Wait time between retries
/LOG+:file :: output status to LOG file
/IT :: Include Tweaked files
/PURGE :: delete dest files/dirs that no longer exist in source

/COPYALL :: COPY ALL file info

Important ones to look at the attribute and you should be aware
1. /ZB  is very important if source files\folders you don't have permission .. basically we telling that if no pemission too just treat as Backup mode and copy over to the destination location
2./PURGE : this one confuses lot of people , remember to make sure destination folders are empty.. if you have data it will be gone.So what this basically doing is replicating Source and Destination folders and anything not in Source will be removed .
3. /COPYALL : i will copy all the files and folders will the permissions in tact.

so this is how we did

1. Requested permission as Administrators on the Netapp filler
2.Work with business to identify how much of data we will move on weekly basis because this is huge data we looking and there is no way you can do 1 time cut-over
So we identified the root share folders and started setting up Robocopy.bat files with above line marked in yellow on the destination folder or any intermediate servers.
3. Now how do we move datacopy, if you have a dedicated link its better to use it.
4. Usually our change weekends starts on Saturday so we set up initial Sync to run over weekend ends before business starts on the Monday.
5. During the week we will do one or more sync so that during the final cut over we will have less data to cut over and less time.We will rename the log file so that it creates a new log file and not append the existing log file that way we don't have check though big log text file for skipped or errors
6. Finally on the day of cut over we  request all the users not to access the shares,do the final sync and do some testing to make sure all permission and everything are intact.

It took about 3-4 weeks to get through all the 20 TB data successfully with Zero loss of data.

Note: Windows 2012R2 File share cluster creation there are lot of articles on the internet if anyone is looking.

Hope this helps someone!!!




WINDBG saved my day one more time!!!!

Good day All,

Sorry its been a very busy couple of Months so started to get sometime so will catch up on couple of topics..

Last couple of days my laptop was acting up and when ever i tried to reboot the Laptop it will through a blue dump.. i thought it was one of thing and when retired again then same error so decided to fix it.

As Laptop was set to configure only Minidump i said to myself lets see if i can find anything in Mini dump if not then will set it for Kernal or Full dump.

Note; if any one wants to know what is difference in Mini,kernal and Full dump kindly google around there are tons of article about it.

So just loaded the windbg and loaded the Mini dump and ran the usual !analyze- v command.


As it couldn't load the Symbol to Module it showing the Module name as ntkrnlmp. If you see the Faulting Module it showing a driver called jpnrna6.

So either you click on that Faulting Module or type lmvm jpnrna6, it will show you more details on the driver.As this is third party driver there was no symbol associated to it was not loading the symbols and correct faulting drivers was not listing in the above !analyze command.



Now that we know the drivers location path, i checked the properties and found that its related to Juniper VPN client.
Searched on the vendor website found a updated drivers, uninstalled the existing VPN client and re-installed it and vola !!! issue got fixed.

So one more reason why little knowledge on windbg will help us do the initial troubleshooting.

Hope this helps someone!!!!

Thursday, August 20, 2015

Printer Settings could not be saved, Operation could not be completed!!!!!!!!!!!!!!!!!!!

Good day All,

Welcome Back!!!
Today i will share with all a incident which happened.. We had a request to change Printer settings like new IP and Name for a printer on a Windows 2008 Print Server.

So as usually we right clicked on the Printer, changed the name and went on to Add new Port, new IP and when we clicked Apply we started to see this error as below


After some troubleshooting we identified that it needs Windows Firewall to be enabled and running as by default we have Windows Firewall disabled on all Windows Servers. As soon as we enabled Windows Firewall we where able to Apply the settings.Why we need this to be enabled i will let you guys do some research....

Hope this helps someone, until next time you guys have a good day!!!!!!!!!!!!!!!!!!!!!!!!!!!

Monday, August 10, 2015

VMHardware Version for various flavours of VMware vSphere

Good day All,

Welcome come back!!!

We started to perform Virtual Machine Hardware Version in our environment , having this chart little handy helped me, hopefully it may help someone!!!!



Windows 2008 booting failed with illegal Opcode

Good day All,

Welcome back!!!

We had patching this weekend and after we patched a Windows 2008 Server, the Server didn't come online and it started rebooting with the error as illegal opcode and with some flag errors as below




As part of troubleshooting we booted the Server with a Windows 2008 Bootable ISO and ran Check Disk..
After check disk was run, rebooted the Server and guess what ola!!! Server booted with no errors and came back online. What caused the error is still unknown, if anyone has any thoughts welcome to write back to me..


Hope this helps someone!!! till next time.. Have a good day!!!!!!!!!!!!!!!!

Wednesday, August 5, 2015

How to identify which Server Schedule job running from a Email it generates!!!!!!

Good day All!!!

We had some Schedule job setup for VMware capacity to be reported via Email every week for like 5 Virtual center and we needed some modification to be done on the job so team started to search for it.

Team started to search on lot of Servers including our Virtual Centers to check where is the Schedule job setup and they had no clue to identify it as this was setup long time ago.. and finally this came to me.. Does anyone guessed? how to trace back the Server which is generating that mail?

If anyone guessed Internet Header then yes you are absolutely right!!!!!!!!!

We had outlook 2013, in case you don't know how to check the Internet Header , Open the message, click on that little arrow in the Tags and that will pull the properties page with Internet headers .

Now copy the text to a notepad and look for something called "Received: From " that will show you the host name and IP Address of the Server which was sending the mail out... Ola! resolved!!!!





Hope this helps someone!!!!!!!!!!