HP MPX200 Multifunction Router - Manual (Page 33)

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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.
Data scrubbing 33