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NAME

     ctl — CAM Target Layer

SYNOPSIS

     To compile this driver into the kernel, place the following line in your kernel
     configuration file:

           device ctl

     Alternatively, to load the driver as a module at boot time, place the following line in
     loader.conf(5):

           ctl_load="YES"

DESCRIPTION

     The ctl subsystem provides SCSI disk and processor emulation.  It supports features such as:

     ·   Disk and processor device emulation
     ·   Tagged queueing
     ·   SCSI task attribute support (ordered, head of queue, simple tags)
     ·   SCSI implicit command ordering support.
     ·   Full task management support (abort, LUN reset, target reset, etc.)
     ·   Support for multiple ports
     ·   Support for multiple simultaneous initiators
     ·   Support for multiple simultaneous backing stores
     ·   Persistent reservation support
     ·   Mode sense/select support
     ·   Error injection support
     ·   All I/O handled in-kernel, no userland context switch overhead

     It also serves as a kernel component of the native iSCSI target.

SEE ALSO

     ctladm(8), ctld(8), ctlstat(8)

HISTORY

     The ctl subsystem first appeared in FreeBSD 9.1.

AUTHORS

     The ctl subsystem was written by Kenneth Merry <ken@FreeBSD.org>.