PDC crash - no backup
Good morning everyone.
I've got a server for repair. It is in a very bad condition - there are several problems which need to be resolved, there are hardware and software issues.
First, let me describe the situation. The server is primary and the only domain controller in the customer's company.
It's name is SRV1 and it hosts the following roles:
1. Domain controller
2. SQL Server
3. App server
4. File server
Here are the server characteristics:
Intel Xeon 3220
Intel SH3210SHLC motherboard
4 GB of RAM
3 x 500 GB Seagate HDD, configured in RAID-5 array.
Now, let's start with the problems... (Initial problem, the reason why the server ended up at my place was that it won't boot the OS, Windows Server 2008 ).
1. The first one is that server won't power on regularly. The only way to power on the server is by removing power cord and BIOS battery, waiting for a few minutes, and then putting back the battery - at the moment the power cord is plugged in, the server starts
to work without pressing the Power On button.
2. The second problem follows the first. The BIOS configuration is reset after every Power On procedure and I need to manually set the integrated SATA controller to Intel Matrix RAID mode.
3. When I get to the POST, RAID BIOS says that the drive one in the array is failed. I replaced the disk with the new one (brand new, unformatted disk) and choosed the option to recover the volume. After that I've got the message that the drive recovery will
be finished once the windows boots and everything seems fine.
4. After exiting the RAID BIOS configuration, the Windows Server 2008 boot sequence starts, but shortly after that I get the BSOD. I tried Safe mode, Last known good configuration, Safe mode with command prompt - nothing helped.
What are my options and next steps here?
I have a plan for today, but I am not sure if it will work, so I'm posting it here:
I have a spare server (Intel SR2500 with two processors and 8 GB of RAM), it supports RAID. It has two 160 GB disk. I will install Windows Server 2008 on that server. After that I plan to move all three disks from the failed server, to the new one and try to
import the RAID set.
Is that even possible? If it is, I would try to recover the RAID array. If I manage to recover the RAID array, what are the next options for me? Can I then put the RAID set in the old server in order to boot it and transfer the Active Directory FSMO roles to
the new server? Of course, this action assumes that Windows Server 2008 boots up regularly, which is something I don't believe very much.
If the server doesn't boot, but I manage to recover the RAID set, is it possible to recover the Active Directory domain using the AD database that is located on the RAID array?
And the last question, what to do in case that I fail to recover the RAID array on the new server? What are my options then? Is there a possibility to recover the data using the remaining two disks in the array? As far as I understand the whole RAID-5 concept,
if one drive fails, the data remains safe on the remaining disks.
I apologize for the size of the post and large number of questions. I just wanted to explain the whole situation. I would appreciate any help from the forum members.
Thank you in advance.
Regards,
Srdjan
July 9th, 2011 8:04am
Hello,
First, let me describe the situation. The server is primary and the only domain controller in the customer's company.
It's name is SRV1 and it hosts the following roles:
1. Domain controller
2. SQL Server
3. App server
4. File server
running SQL and applications on DCs is not recommended.
Do you have an additional DC with a GC? If yes, we can use it to solve your AD problems.
In this case, you have to:
Perform a metadata cleanup remove remaining DNS records of the old DC resize FSMO roles to the additional DC
For SQL, i recommend asking here: http://social.technet.microsoft.com/Forums/en-US/category/sqlserver
Personally, I think it will be better to check how to repair the old server without moving disks ...
Possible you may need to pay and contact Microsoft PSS if this is the only DC in your domain.
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July 9th, 2011 8:54am
Unfortunately, there are are no additional DCs in the network.
Additionally, I didn't manage to recover the data from the RAID array.
July 10th, 2011 5:20am
Hello,
again, if there is no additional DCs, no backups and you are unable to recover the old DC, consider your domain as last. In this case, you have to reconstruct it from scratch.
In the future, you have to add at least two DC / DNS / GC servers per domain to avoid that.
This
posting is provided "AS IS" with no warranties or guarantees , and confers no rights.
Microsoft
Student Partner 2010 / 2011
Microsoft Certified
Professional
Microsoft Certified
Systems Administrator: Security
Microsoft Certified
Systems Engineer: Security
Microsoft Certified
Technology Specialist: Windows Server 2008 Active Directory, Configuration
Microsoft Certified
Technology Specialist: Windows Server 2008 Network Infrastructure, Configuration
Microsoft Certified
Technology Specialist: Windows Server 2008 Applications Infrastructure, Configuration
Microsoft Certified
Technology Specialist: Windows 7, Configuring
Microsoft Certified
IT Professional: Enterprise Administrator
Free Windows Admin Tool Kit Click here and download it now
July 10th, 2011 6:42am


