How can I improve the failover time of a faulty path when using device-mapper-multipath over iSCSI in Red Hat Enterprise Linux?

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When accessing SAN storage over iSCSI, it is often desirable for failing connections to be retried multiple times before passing the I/O error back to the application layer. However, on systems using device-mapper-multipath it is usually preferable to have the SCSI layer quickly fail an errant path and pass the error back up to device-mapper. This way I/O can be route...

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