Data scrubbing. Qlogic MPX200

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For iSCSI migrations, set the migration I/O size to 64 K.

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Use only new destination LUNs to select the recommended (and better performing) TP and

No Validation option under TP Settings when creating the migration job.

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If migrating to a thin-provisioned storage, always allocate destination LUN first. HP does not recommend the Yes and TP validation option under TP Settings when creating the migration job.

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Schedule and start remote migration jobs at off peak hours, so that a small number of dirty regions are generated, and most of the WAN bandwidth is available to perform the initial data copy.

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Follow the guidelines for DML size. Selecting the Yes and TP validation option can result in a long migration time and may require more bandwidth between two sites.

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To ensure faster migration, migrate storage for a few servers at a time.

Data scrubbing

The data scrubbing feature provides a method of securely wiping out data on a LUN. This feature implements several U.S. DoD specifications, including the number of passes and the data pattern written. Each pass starts at the beginning of the LUN and completes after the I/O to the last LBA of the job is completed.

The current firmware release provides the following algorithms and passes:

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ZeroClean: Two passes

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DOD_5220_22_M: Four passes

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DOD_5220_22_M_E: Four passes

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DOD_5220_22_M_ECE: Eight passes

Data scrubbing job attributes

Data scrubbing for data migration includes the following:

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Source LUN: Indicates the LUN that needs to be scrubbed. The source LUN for a scrubbing job must not be mapped to a host and must not be part of another job.

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Job Group: Same as data migration job groups.

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Scrubbing Algorithm: As noted in the previous section.

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Scheduling: Same as data migration job scheduling.

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Scrubbing CurrentPass: Specifies the currently active pass for a scrubbing job.

Data scrubbing protections

Data scrubbing protections include the following:

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The scrubbing job configuration wizard only shows LUNs that are part of a Source or

Source+Destination array.

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Job configuration on LUNs that are mapped to an initiator or part of a migration job is not allowed.

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LUN presentation of a LUN that is part of a scrubbing job will fail.

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An additional confirmation is required while configuring a scrubbing job.

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