This error only happens for volumes that are started automatically by vxconfigd at system startup (that is, the root and /usr file system volumes). The plex is being detached as a result of I/O failure, disk failure during startup or prior to the last system shutdown or crash, or disk removal prior to the last system shutdown or crash.
To ensure that the root or /usr file system retains the same number of active mirrors, remove the given plex and add a new mirror using the vxassist mirror operation. Also consider replacing any bad disks before running this command.
VERITAS
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