Nexsan BEAST Series, User Manual, Page: 133 / 267

Verify RAID Array
Clicking Configure RAID > Array Verify takes you to the Verify RAID Array page, which lets you configure
the method and frequency of RAID array verification.
Figure 3-79: Verify RAID Array page
Schedule Default RAID Array Verification
Use the Default Verify Configuration section to set up the default RAID array verification schedule.
►
To schedule default RAID array verification:
1. For Select verify utility to use , select one of the verification utilities. There are three choices available:
Surface scan , Parity scrub , and None .
Surface scan reads all blocks on each disk drive in the array to ensure their integrity. If it encounters
a bad block, it will quarantine that block and rebuild it using mirrored data (for RAID 1 or 10) or parity
data (for RAID 4, 5 or 6).
Note If bad data blocks occur on arrays configured as RAID 0, Surface scan will not be able to rebuild
the data.
Parity scrub reads all array data and ensures that the parity data is intact. If it encounters a parity
inconsistency, it will correct the inconsistency. Parity scrub also rebuilds bad data blocks in a similar
fashion to
Surface scan .
None : If you do not wish RAID array verification to be scheduled, select None .
Note If you choose None , it is still recommended that, at a minimum, you perform a Surface Scan at
least once per week. See Start or Stop RAID Array Verification Immediately on the next page.
2. For Verify Interval , select one of the options: 1 week (the default), 2 weeks , or 4 weeks .
Chapter 3: The Graphical User Interface — Configure RAID
Nexsan High-Density Storage
User Guide
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