HP-UX iSCSI Software Initiator Components

The iSCSI Software Initiator has two kernel components:

iSCSI Transport Driver: the session management and transport module.
iSCSI Software Interface Driver: this module interfaces with the iSCSI Transport Driver and the host based TCP/IP stack.

The iSCSI Software Initiator has four user space components:

iswd: A connection management daemon. It opens and terminates connections for the iSCSI Software Interface Driver.
iscsi_resolvd: This daemon resolves addresses for the iSCSI Software Transport Driver. It resolves host names, provided the domain name can be determined from the host name.
islpd: This daemon is the SLP User Agent for iSCSI. It interfaces with the iSCSI Software Transport Driver to update iSCSI persistent information with discovered iSCSI Targets.
iradd: This daemon implements the interface between the iSCSI Software Transport driver and a RADIUS server. It authenticates targets during iSCSI login using the Challenge Handshake Authentication Protocol (CHAP).




	NOTE: For more information on the `iswd` daemon, see “iSCSI Software Interface Driver Daemon (iswd)”. For more information on the `iscsi_resolvd`, `islpd`, and `iradd` daemons, see “iSCSI Software Initiator Daemons”.

Figure 2-1 HP-UX iSCSI Software Initiator Block Diagram

Technical documentation