• Contact: tech-kern
• Mentors: Greg Oster
• Duration estimate: 175h

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