Which Linux kernel supports dynamic LUN scanning?

A.
2.3

B.
2.4

C.
2.5

D.
2.6

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.