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[[!template id=project

title="RAIDframe scrubbing"

contact="""
[tech-kern](mailto:tech-kern@NetBSD.org)
"""

mentors="""
[Greg Oster](mailto:oster@NetBSD.org)
"""

category="filesystems"
difficulty="medium"
duration="two months"

description="""
Implement component 'scrubbing' in RAIDframe.

RAIDframe (raid(4)) provides various RAID levels to NetBSD, but currently has
no facilities for 'scrubbing' (checking) the components for read errors.  

Milestones:

* implement a generic scrubbing routine that can be used by all RAID types
* implement RAID-level-specific code for component scrubbing
* add an option to raidctl (raidctl(8)) to allow the system to run the scrubbing as required
* update raidctl (raidctl(8)) documentation to reflect the new scrubbing capabilities, and discuss what scrubbing can and cannot do (benefits and limitations)

Bonus:

* Allow the user to select whether or not to attempt to 'repair' errors
* Actually attempt to repair errors

"""

]]

[[!tag gsoc]]