Taking Down a Mirror Chunk

When a mirror chunk is down, the database server cannot write to it or read from it. You might take down a mirror chunk to relink the chunk to a different device. (See Relinking a Chunk to a Device After a Disk Failure.) Taking down a chunk is not the same as ending mirroring. You end mirroring for a complete dbspace, which causes the database server to drop all the mirror chunks for that dbspace. Use the onutil ALTER DBSPACE command with the OFFLINE clause to take down a chunk.

% onutil
1> alter dbspace dbsp1 (offline)
2> chunk "/dev/chunk2" offset 1024;