PERC/How to do when Array information mismatch between HBA and HDD?

디스크를 재장착 한다거나 하여, 어레이 컨트롤러의 정보와 디스크 상의 구성 정보가 상이하여 기존 구성정보가
정상적으로 인식되지 않을 때 복원하는 방법.

언제나 그렇듯이 안하는 것이 좋고 백업이 필수가 아니겠는가!

Dell PowerEdge RAID 컨트롤러 (PERC) H700 및 H800 사용 설명서
http://support.dell.com/support/edocs/storage/Storlink/H700H800/ko/ug/HTML/chapterh.htm
http://support.dell.com/support/edocs/storage/Storlink/H700H800/en/UG/HTML/chapterh.htm

Importing or Clearing Foreign Configurations Using the VD Mgmt Menu

When a foreign configuration exists, the BIOS screen displays the message Foreign configuration(s) found on adapter. In addition, a foreign configuration is displayed on the right side of the Ctrl Mgmt screen.

You can use the VD Mgmt menu to import the existing configuration to the RAID controller or clear the existing configuration. In addition, you can view the foreign configuration from the Foreign View tab without importing the configuration.

NOTE: The controller does not allow an import of configurations that results in more than 64 virtual disks.

NOTE: To import a secured foreign configuration, see Security Key and RAID Management.

Perform the following steps to import or clear foreign configurations:

1. During bootup, press <Ctrl><R> when prompted by the BIOS screen.

The VD Mgmt screen is displayed by default.

2. On the VD Mgmt screen, highlight the Controller #.
   
3. Press <F2> to display the available actions.
   
4. Navigate to the Foreign Config option and press the right arrow key to display the available actions: Import and Clear.

NOTE: Ensure that your virtual disk has all the physical disks by verifying that there are no physical disks marked as Missing in the foreign view page and that all the disks appear as expected before importing them.

5. Select Import to import the foreign configuration or Clear to delete the foreign configuration and then press <Enter>.

If you import the configuration, the VD Mgmt screen displays detailed configuration information. It includes information about the disk groups, virtual disks, physical disks, space allocation, and hot spares.

Importing or Clearing Foreign Configurations Using the Foreign Configuration View Screen

NOTE: To import a secured foreign configuration, see Security Key and RAID Management.

If one or more physical disks are removed from a configuration, the configuration on those disks is considered a foreign configuration by the RAID controller.

You can use the Foreign Configuration View screen to view information about the foreign configuration, such as disk groups, virtual disks, physical disks, space allocation, and hot spares. The foreign configuration data is displayed in the same format as configurations on the VD Mgmt screen. You can use the VD Mgmt screen to view the foreign configuration before importing. After you view the foreign configuration, you can either clear or import to the RAID controller.

NOTE: Before you import the foreign configuration, review the configuration on the screen to ensure that it is the end result that you require.

You can use the Foreign Configuration View screen to manage foreign configurations in the following cases:

• All the physical disks in a configuration are removed and re-inserted.
• 구성의 모든 물리 디스크가 분리되었다가 다시 삽입되는 경우
  
• Some of the physical disks in a configuration are removed and re-inserted.
• 구성의 일부 물리 디스크가 분리되었다가 다시 삽입되는 경우
  
• All the physical disks in a virtual disk are removed, but at different times, and then re-inserted.
• 가상 디스크의 모든 물리 디스크가 각기 다른 시간에 분리되었다가 다시 삽입되는 경우
  
• The physical disks in a non-redundant virtual disk are removed.
• 비중복 가상 디스크의 물리 디스크가 분리되는 경우

The following constraints apply to the physical disks that are considered for import:

• The disk state of a physical disk can change from the time the foreign configuration is scanned to when the actual import occurs. The foreign import occurs only on disks that are in the Unconfigured Good state.
• Disks in the failed or offline state cannot be imported.
• The firmware does not allow you to import more than eight foreign configurations.

Perform the following procedures on the Foreign Configuration View screen to manage foreign configurations in each specific case:

1. If all or some of the physical disks in a configuration are removed and reinserted, the controller considers the disks to have foreign configurations. Perform the following steps:
   
   
   1. Select Foreign Configuration View to display the foreign configuration information on the Foreign Configuration View screen.
      
   2. Press <F2> to display the options (Import, Clear).

NOTE: You must have all the disks in the system before you perform the import operation.

3. Select Import to import the foreign configuration to the controller or select Clear to delete the foreign configuration(s) from the re-inserted disk(s).

In the Preview Configuration Data window, the status of a physical disk that needs to be rebuilt is displayed as Rebuild.

NOTE: When you import a foreign configuration, the dedicated hot spares in the configuration are imported as dedicated hot spares on two conditions — the associated virtual disk is already present or the associated virtual disk is also imported along with the configuration.

NOTE: Start a consistency check immediately after the rebuild is complete to ensure data integrity for the virtual disks. For more information about checking data consistency, see Checking Data Consistency.

2. If all the physical disks in a virtual disk are removed at different times and re-inserted, the controller considers the disks to have foreign configurations. Perform the following steps:
   
   
   1. Select Foreign Configuration View to display the complete virtual disk, across different foreign configurations and allow foreign configurations to be imported.
      
   2. Press <F2> to display the options Import and Clear.

NOTE: You must have all the drives in the system before you perform the import operation.

3. Select Import to merge the foreign configurations with the existing configuration on the controller or Clear to delete the foreign configuration(s) from the re-inserted disk(s).

If you select Import, all drives that were pulled before the virtual disk became offline are imported, and then automatically rebuilt.

NOTE: Start a consistency check immediately after the rebuild is complete to ensure data integrity for the virtual disks. For more information about checking data consistency, see Checking Data Consistency.

3. If the physical disks in a non-redundant virtual disk are removed, the controller considers the disks to have foreign configurations. Perform the following steps:
   
   
   1. Select Foreign Configuration View to display the complete foreign configuration information.
      
   2. Press <F2> to display the options Import and Clear.
      
   3. Select Import to import the foreign configuration to the virtual disk or Clear to delete the foreign configuration(s) from the re-inserted disk(s).

No rebuilds occur after the import operation because there is no redundant data to rebuild the disks with.