NAME

     iscsi — iSCSI initiator

SYNOPSIS

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

           device iscsi

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

           iscsi_load="YES"

DESCRIPTION

     The iscsi subsystem provides the kernel component of an iSCSI initiator, responsible for
     implementing the Full Feature Phase of the iSCSI protocol.  The initiator is the iSCSI
     client, which connects to an iSCSI target, providing local access to a remote block device.
     The userland component is provided by iscsid(8) and both the kernel and userland are
     configured using iscsictl(8).

SYSCTL VARIABLES

     The following variables are available as both sysctl(8) variables and loader(8) tunables:

     kern.iscsi.debug
             Verbosity level for log messages from the iscsi driver.  Set to 0 to disable logging
             or 1 to warn about potential problems.  Larger values enable debugging output.
             Defaults to 1.

     kern.iscsi.ping_timeout
             The number of seconds to wait for the target to respond to a NOP-Out PDU.  In the
             event that there is no response within that time the session gets forcibly
             restarted.  Set to 0 to disable sending NOP-Out PDUs.  Defaults to 5.

     kern.iscsi.iscsid_timeout
             The number of seconds to wait for iscsid(8) to establish a session.  After that time
             iscsi will abort and retry.  Defaults to 60.

     kern.iscsi.login_timeout
             The number of seconds to wait for a login attempt to succeed.  After that time iscsi
             will abort and retry.  Defaults to 60.

     kern.iscsi.maxtags
             The maximum number of outstanding IO requests.  Defaults to 255.

     kern.iscsi.fail_on_disconnection
             Controls the behavior after an iSCSI connection has been dropped due to network
             problems.  When set to 1, a dropped connection causes the iSCSI device nodes to be
             destroyed.  After reconnecting, they will be created again.  By default, the device
             nodes are left intact.  While the connection is down all input/output operations are
             suspended, to be retried after the connection is reestablished.

SEE ALSO

     iser(4), iscsi.conf(5), iscsictl(8), iscsid(8)

HISTORY

     The iscsi subsystem first appeared in FreeBSD 10.0.

AUTHORS

     The iscsi subsystem was developed by Edward Tomasz Napierala <trasz@FreeBSD.org> under
     sponsorship from the FreeBSD Foundation.