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passthrough The default value of on-io-error is to report I/O errors to the upper layer. I/O errors are sent to the mounted file system in the case of the primary node, and error results to the primary node, but in the secondary node errors are ignored (if there is no replication connection). At this time, the disk status is maintained and the error block is recorded in OOS.
max-passthrough-count You can't have an infinite number of passthroughs. If more than a certain number of passthroughs are repeated, it should be considered a permanent disk failure, and you specify the threshold here.
detach When a lower-level I/O error occurs, the node detaches the backup device from the replication volume and switches to diskless state.
call-local-io-error. Call the command defined by the local I/O error handler. This option is only available if local-io-error <cmd> is defined in the <handlers> section of the resource. Using the local-io-error call command or script, I/O error handling is entirely at the user's discretion.
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