Media recovery

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If system failure prevents the operating system from starting on a client computer, Check Point Full Disk Encryption has these options: Full Recovery with Recovery Media - Decrypts the failed disk. This takes more time than Full Disk Encryption Drive Slaving Utility and Dynamic Mount Utility that let you access data quickly. If system failure prevents the operating system from starting on a client computer, you can use Full Disk Encryption Recovery Media to decrypt the computer and recover the data. Client computers send recovery files to the Endpoint Security Management Server one time during the initial deployment so that you can create recovery media if necessary. After the recovery, the files are restored as decrypted, like they were before the Full Disk Encryption installation, and the operating system can run without the Pre-boot. After the recovery, you must install Full Disk Encryption on the computer. Recovery Media: Is a snapshot of a subset of the Full Disk Encryption database on the client. Contains only the data required to do the recovery. Updates if more volumes are encrypted or decrypted. Removes only encryption from the disk and boot protection. Does not remove Windows components. Restores the original boot record. Users must authenticate to the recovery media with a username and password. There are the options for which credentials to use: Users that are assigned to the computer and have the permission (in > > can authenticate with their regular username and password. When you create the recovery media, you can create a temporary user who can authenticate to it. A user who has the credentials can authenticate to that recovery media. Users do not require permission to use the recovery media. Smart Card users must use this option for recovery. Creating Data Recovery Media You can create Full Disk Encryption recovery media that can run on a failed computer to decrypt it. Create the recovery media on the server or with an external tool. The media can be on a CD/DVD, USB device, or REC file. Note - Creating a recovery media on a USB flash disk formats the device and removes all previous content. To create recovery media from the Endpoint Security Management Server: In Smart Endpoint, select Tools > . The window opens. Double-click a folder from the navigation tree to see the users and computers that it contains. Right-click the computer to restore and then select Encryption Recovery Media. The target retrieves the last known recovery data that was uploaded to the server by the client. Users who have permission to use recovery media for the computer show in the area. If the user who will do the recovery shows on the list, continue to the next step. If the user who will do the recovery is not on the list: Click to create a temporary user who can use the recovery media. In the window that opens add a username and password that the user will use to access the file. Select a destination for the

This chapter explains how to restore and recover individual data blocks within a data file. This chapter contains the following topics:Overview of Block Media RecoveryPrerequisites for Block Media RecoveryRecovering Individual BlocksRecovering All Blocks in V$DATABASE_BLOCK_CORRUPTIONSee Also:Oracle Database Backup and Recovery Reference for RECOVER syntaxOracle Database Reference for details about the V$DATABASE_BLOCK_CORRUPTION viewOverview of Block Media RecoveryThis section explains the purpose and basic concepts of block media recovery.Purpose of Block Media RecoveryYou can use block media recovery to recover one or more corrupt data blocks within a data file. Block media recovery provides the following advantages over data file media recovery:Lowers the mean time to recover (MTTR) because only blocks needing recovery are restored and recoveredEnables affected data files to remain online during recoveryWithout block media recovery, if even a single block is corrupt, then you must take the data file offline and restore a backup of the data file. You must apply all redo generated for the data file after the backup was created. The entire file is unavailable until media recovery completes. With block media recovery, only the blocks actually being recovered are unavailable during the recovery.Block media recovery is most useful for physical corruption problems that involve a small, well-known number of blocks. Block-level data loss usually results from intermittent, random I/O errors that do not cause widespread data loss, and memory corruptions that are written to disk. Block media recovery is not intended for cases where the extent of data loss or corruption is unknown and the entire data file requires recovery. In such cases, data file media recovery is the best solution.Basic Concepts of Block Media RecoveryUsually, the database marks a block as media corrupt and then writes it to disk when the corruption is first encountered. No subsequent read of the block is successful until the block is recovered. You can perform block recovery only on blocks that are marked corrupt or that fail a corruption check.If the database on which the corruption occurs is associated with a real-time query physical standby database, then the database automatically attempts to perform block media recovery. The primary database searches for good copies of blocks on the standby database and, if they are found, repairs the blocks with no impact to the query that encountered the corrupt block. The Oracle Database physical block corruption message (ORA-1578) is displayed only if the database cannot repair the corruption.Whenever block corruption