## Recovering SME Disks

During data preparation if there are any failures, the data preparation process is aborted. If a failure occurs, the disk is put in a failed state and all host I/Os to the disk fails. This section describes the procedure to follow to recover the disk back to the state before the data preparation.

In signature mode, SME verifies the signature on the disk by comparing the disk information in the KMC. Any mismatch between the information in KMC and the signature results in disk failure.

Caution The Recover command does not recover the contents of the disk. This command recovers the crypto-state of the disk based on the data recovered into the disk. The data on the disk must first be restored before using the recover command.

Note Restoration of the contents of the disk is done by a backend storage operation that copies the backup data from a mirror or snapshot in the disk array. This restoration does not require the failed disk to be accessible from host. This is important because SME does not allow any host access to the failed disk.