Dell H710P, H310, H810 manual Patrol Read, Automatic Replace Member with Predicted Failure

Models: H310 H710 H710P H810

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Automatic Replace Member with Predicted Failure

Automatic Replace Member with Predicted Failure

A Replace Member operation can occur when there is a SMART predictive failure reporting on a physical disk in a virtual disk. The automatic Replace Member is initiated when the first SMART error occurs on a physical disk that is part of a virtual disk. The target disk needs to be a hot spare that qualifies as a rebuild disk. The physical disk with the SMART error is marked as failed only after the successful completion of the Replace Member. This avoids putting the array in degraded status.

If an automatic Replace Member occurs using a source disk that was originally a hot spare (that was used in a rebuild), and a new disk added for the Replace Member operation as the target disk, the hot spare reverts to the hot spare state after a successful Replace Member operation.

NOTE: To enable the automatic Replace Member, use the Dell OpenManage storage management application. For more information on automatic Replace Member, see "Dell OpenManage Storage Management" on page 51. For information on manual Replace Member, see "Replacing an Online Physical Disk" on page 83.

Patrol Read

The Patrol Read feature is designed as a preventative measure to ensure physical disk health and data integrity. Patrol Read scans for and resolves potential problems on configured physical disks. The Dell OpenManage storage management application can be used to start Patrol Read and change its behavior.

The following is an overview of Patrol Read behavior:

Patrol Read runs on all disks on the controller that are configured as part of a virtual disk, including hot spares.

Patrol Read does not run on physical disks that are not part of a virtual disk or are in Ready state.

Patrol Read adjusts the amount of controller resources dedicated to Patrol Read operations based on outstanding disk I/O. For example, if the system is busy processing I/O operation, then Patrol Read uses fewer resources to allow the I/O to take a higher priority.

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Dell H710P, H310, H810 manual Patrol Read, Automatic Replace Member with Predicted Failure