Lenovo RD430 manual Rebuilding a physical drive, Running a consistency check

•If you want to set a hot-spare drive right after the configuration, select Objects ➙ Physical Drive from the program main interface. Then, select the hard disk drive that you want to set as a hot-spare drive and press Enter. A submenu is displayed. Select Make Hot Spare from the submenu and then select Yes when prompted to set the hard disk drive as a hot-spare drive.

Rebuilding a physical drive

This topic provides instructions on how to rebuild a physical drive using the LSI Software RAID Configuration Utility program when a physical drive in a RAID array fails.

When a physical drive in a RAID array fails, you can rebuild the drive by recreating the data that was stored on the drive before it fails. If the drive is not operational, it must be replaced and the data on the failing drive must be rebuilt on a new drive to restore the system to fault tolerance.

The RAID controller recreates the data using the data stored on other drives in the drive group. Rebuilding can be done only in drive groups with data redundancy, such as RAID 1, RAID 5, and RAID 10 arrays. For detailed information about disk rebuild, refer to “Introduction to RAID” in the MegaRAID SAS Software User Guide on the documentation DVD that comes with your server.

To rebuild a physical drive using the LSI Software RAID Configuration Utility program when a physical drive in a RAID array fails, do the following:

1.Start the LSI Software RAID Configuration Utility program. See “Starting the LSI Software RAID Configuration Utility program” on page 73.

2.On the main interface of the program, select Rebuild and follow the instructions on the screen.

Note: Run a consistency check immediately after the rebuild completes to ensure data integrity for the virtual drives. See “Running a consistency check” on page 76.

The rebuild rate is the percentage of the computing cycles dedicated to rebuilding failing drives. The rebuild rate can be configured between 0 percent and 100 percent. At 0 percent, the rebuild is done only if the system is not doing anything else. At 100 percent, the rebuild has a higher priority than any other system activity.

To configure the rebuild rate using the LSI Software RAID Configuration Utility program, do the following:

Note: Using a rebuild rate of 0 or 100 percent is not recommended. The default value is 30 percent.

1.Start the LSI Software RAID Configuration Utility program. See “Starting the LSI Software RAID Configuration Utility program” on page 73.

2.On the main interface of the program, select Objects ➙ Adapter ➙ Rebuild Rate.

3.Set the rebuild rate by typing a desired value from the keyboard directly.

Running a consistency check

This topic provides instructions on how to run a consistency check for virtual drives using the LSI Software RAID Configuration Utility program.

The consistency check operation verifies that all stripes on a virtual drive with a redundant RAID level (RAID 1, RAID 5, and RAID 10) are consistent and the date on the virtual drive is correct. For example, in a system with parity, checking consistency means computing the data on one drive and comparing the results to the contents of the parity drive.

You should run a consistency check on fault-tolerant virtual drives periodically. It is recommended that you run a consistency check at least once a month. You must run a consistency check if you suspect that the virtual drive data might be corrupted. Ensure that you back up the data before running a consistency check if you suspect that the data might be corrupted.

76ThinkServer RD430 User Guide