HP Hitachi Dynamic Link Manager Software Licenses - Manual (Page 633)

F
failback
A function for placing the status of a path recovered from an error into the Online
status, and then switching the access path to the path that was just recovered.
failover
A function for switching to another normal path if there is an error in the current access
path, thereby enabling the system to continue to operate.
FCode
A program written by the interpreter language that is not dependent on the machine.
The HBA that can connect to a boot disk might incorporate FCode for use.
H
HAM environment
An environment in which volume pairs that are synchronized between two storage
systems are created by HAM (High Availability Manager), and hosts are configured to
recognize these volumes as one volume. An HAM environment consists of the primary
volume (P-VOL) in the primary site and the secondary volume (S-VOL) in the secondary
site. When an error occurs on one of the volumes, the path can be switched to the other
volume by using HDLM.
HBA (Host Bus Adapter)
A device that is an interface between hosts and external devices.
In this manual, the term HBA refers to an interface card installed in a host, in
configurations where the host and storage units are connected via a SCSI or a FC
connection.
HDLM alert driver
A program that receives information about an error detected by the HDLM driver, and
then reports the error information to the HDLM manager.
HDLM driver
A program that controls all the HDLM functions, manages paths, and detects errors.
HDLM manager
A program that manages error information. The HDLM manager receives error
information from the HDLM alert driver and then collects error logs.
HDLM nexus driver
A program that manages HDLM driver instances. The HDLM nexus driver manages the
HDLM driver instances for each HBA port to which an sd or ssd driver, which is managed
by HDLM, is connected.
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Glossary-3
Hitachi Dynamic Link Manager (for Solaris) User Guide