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Explanation/Reference: Explanation: Linux provides multiple mechanisms to rescan the SCSI bus and recognize SCSI devices exposed to the system. In the 2.4 kernel solutions, these mechanisms were generally disruptive to the I/O since the dynamic LUN scanning mechanisms were not consistent. With the 2.6 kernel, significant improvements have been made and dynamic LUN scanning mechanisms are available. Linux currently lacks a kernel command that allows for a dynamic SCSI channel reconfiguration like drvconfig or ioscan.