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The ZX81 had a base configuration of 1 KB of on-board memory that could officially be expanded externally to 64 KB.
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iscsi_create_conn(9) [centos man page]

ISCSI_CREATE_CONN(9)						  SCSI mid layer					      ISCSI_CREATE_CONN(9)

NAME
iscsi_create_conn - create iscsi class connection SYNOPSIS
struct iscsi_cls_conn * iscsi_create_conn(struct iscsi_cls_session * session, int dd_size, uint32_t cid); ARGUMENTS
session iscsi cls session dd_size private driver data size cid connection id DESCRIPTION
This can be called from a LLD or iscsi_transport. The connection is child of the session so cid must be unique for all connections on the session. Since we do not support MCS, cid will normally be zero. In some cases for software iscsi we could be trying to preallocate a connection struct in which case there could be two connection structs and cid would be non-zero. AUTHORS
James Bottomley <James.Bottomley@hansenpartnership.com> Author. Rob Landley <rob@landley.net> Author. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 ISCSI_CREATE_CONN(9)

Check Out this Related Man Page

ISCSI(4)						   BSD Kernel Interfaces Manual 						  ISCSI(4)

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. The initiator is the iSCSI client, which connects to an iSCSI tar- get, 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). The iscsi subsystem is responsible for implementing the "Full Feature Phase" of the iSCSI protocol. SYSCTL VARIABLES
The following variables are available as both sysctl(8) variables and loader(8) tunables: 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. kern.iscsi.iscsid_timeout The number of seconds to wait for ctld(8) to establish a session. After that time iscsi will abort and retry. kern.iscsi.login_timeout The number of seconds to wait for a login attempt to succeed. After that time iscsi will abort and retry. kern.iscsi.maxtags The maximum number of outstanding IO requests. 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
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. BSD
September 11, 2014 BSD

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