IT Infrastructure blog

June 11, 2012

RAID 5 reconfiguration in Dell Powervault MD1000 Storage

Scenario

Currently 12 Hard Disk (SAS) are occupied in Storage box. We are going to add 3 more disks to increase the capacity of existing virtual disk ( It’s a DAS box )

Existing virtual disk contains 5 Hard disk. And 2 more going to add to increase  some space. i.e reconfiguring existing RAID-5

Steps need to taken

Insert disks in to Storage box physically. Once it insert we can see this disk status is ready. ( If you see disk status Foreign please refer below link to troubleshoot

 

 

 https://exchangeengine.wordpress.com/2012/06/09/how-to-clear-foreign-disk-in-dell-powervault-md1000-storage/ 

Click Virtual Disk

 

 

 

 

 

Then select the Virtual disks that you want to re configure RAID 5 ( increase space)

 

 

 

Click Reconfigure from drop down list

 

 

 

 

 

 

 

Then we can see the newly inserted disk there in left side and add these disks in to virtual disk ( in our case we added 2 disks)

Next step we need to choose the RAID level . ( Our case existing is  RAID-5 but we can change to RAID6 or RAID O here)

 

 

 

Next screen we can see the previous and current disk numbers and size. Disk 12 and 13 are the new disks. See the size as well

 

 

 

 

 

 

 

 

Once it confirmed click ok . it will take hours to complete the RAID re configuration. Once it complete successfully you can see the new space in virtual disk.

Next Step

You could able to see this disk in windows host (disk management ) as unallocated.

 

 

If it’s windows 2008 R2 server then you can extend that disk just right click and extend. Other wise you have to use Diskpart command line utility to extend

 

 

 

 

Disk Part

Here is the example below how we can use Diskpart to extend the disk from command line ( below screenshot is not for this particular post. For this i have extended disk from Disk Management GUI)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Now we can see the extended disk space in Disk Managment

 

 

Hope this post has been informative for you. Thanks

 

 

 

 

 

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September 28, 2011

Server service is not starting on windows 2008 server R2

Filed under: SCCM 2007,Windows 2008 Servers — Akther @ 9:08 am
Tags:

We were struggling to start server service in one of the Windows 2008 enterprise edition of R2 server. Because of this issue we were facing lot of issue especially we want to migrate this server in to 2008 Active directory and it cannot because of this server service.

Ok, what we have find out after several research there are two registry entries were corrupted in that server. the registry entries are

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\MSiSCSI 

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\LanmanServer

Which affect the starting for the services “Server” and “Computer Browser” and causes the failure.

And these two registry entries are exported from another working windows 2008 server and imported in to this server. After this service was successfully started. ( Browser service as well started.

 

July 1, 2011

Unable to add performance monitor counters in Windows 2008 Server R2

Filed under: Windows 2008 Servers — Akther @ 2:38 pm
Tags: ,

We were facing this issue in one of the Windows 2008 R2 x64 server and this server is the main Databse server in ERP farm ( MS Dynamics AX is the ERP product)

Ok, Just imagine the pressure from Application and DBA team to solve this issue because they cannot monitor the performance of database and other counters.

The following error occurred while loading performance monitor

Unable to add these counters:

\Memory\Available MBytes

\Memory\% Committed Bytes In Use

\Memory\Cache Faults/sec

\Memory\Cache Faults/sec

\PhysicalDisk(*)\%Idle Time

\PhysicalDisk(*)\Avg. Disk Queue Length

\Network Interface(*)\Bytes Total/sec”

Cause

Te issue was perfmon Counters were corrupted, and have to rebuild these with LODCTR from command prompt. (Run As Administrator)

Resolution

Open Command Prompt , type lodctr /r and press ENTER. This will repair the pointers

C:\Windows\system32>lodctr/r

You have to check is there any providers are disabled. You can check the status with lodctr /q.

[Windows SharePoint Services Performance Monitoring] Performance Counters (Enabled)
DLL Name: C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\12\BIN\onetnative.dllOpen Procedure: OpenPerformanceData
Collect Procedure: CollectPerformanceData
Close Procedure: ClosePerformanceData
First Counter ID: 0x00002A0E (10766)
Last Counter ID: 0x00002A12 (10770)
First Help ID: 0x00002A0F (10767)
Last Help ID: 0x00002A13 (10771)

If it says (Disabled) next to a provider, you can enable it with lodctr/e:<provider name>.

Then try to open perfmon  from run it will work and there is no error

Thanks to Rafeeq who is my great colleague helped us to resolve this problem.

 

 

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