User Guide
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 the
topic 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:
a. Select Foreign Configuration View to display the complete foreign configuration information.
b. Press <F2> to display the options Import and Clear.
c. Select Import to import the foreign configurations 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.
Break Mirror
A Break Mirror operation is an operation that can be performed only on RAID1 arrays. It provides a way to
'split' the mirror and spin-down one of the hard disks, which can then be imported into the configuration
of a different PERC H310, H710, H710P, or H810 controller. This can be a useful way to:
• Create a disk image that can be imported and booted on a different system.
• Assist in software or configuration testing, where half of the mirror can be removed to ensure
configuration consistency.
NOTE: The Break Mirror operation is not available within the booted operating system
environment. It is only available in the BIOS (<Ctrl> <R>) utility and the UEFI RAID configuration
utility.
Break Mirror In BIOS Configuration Utility
The RAID1 VD that you are to split must be in an optimal state, and it cannot be running any other
background tasks.
To use the Break Mirror feature from the BIOS Configuration Utility (<Ctrl> <R>), perform the following
steps:
1. During boot up, press <Ctrl> <R> when prompted by the BIOS screen. If there is more than one
controller in the system, choose the controller.
The VD Mgmt screen is displayed by default.
2. Highlight the appropriate Disk Group.
3. Press <F2> to display the available actions.
4. Choose Break Mirror and press <Enter>.
A dialog is displayed describing the operation and asking if you are sure you want to perform the
operation.
5. Select Yes to continue.
The exported disk (exporting configuration) spins down and the hard drive status LED starts flashing
to identify which drive must be pulled.
The remaining disk (exporting configuration) is in a degraded state until the missing member is
replaced or rebuilt.
If there are any Global or Dedicated Hot Spare assigned which fulfills the rebuild requirements for the
degraded RAID1 disk, a rebuild starts automatically. If there is no Hot Spare assigned, then a Hot
Spare that meets all the requirements for the VD must be assigned before the rebuild starts.
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