IBM DCS3860, Installation, User'S, And Maintenance Manual

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ESM canister
See environmental service module canister .
automatic ESM firmware synchronization
When you install a new ESM into an
existing storage expansion enclosure in a
DS4000
®
storage system that supports
automatic ESM firmware synchronization,
the firmware in the new ESM is
automatically synchronized with the
firmware in the existing ESM.
EXP
See storage expansion enclosure .
expansion port (E_port)
A port that connects the switches for two
fabrics.
Extended Industry Standard Architecture (EISA)
A bus standard for IBM compatibles that
extends the Industry Standard
Architecture (ISA) bus architecture to 32
bits and allows more than one central
processing unit (CPU) to share the bus.
See also
Industry Standard Architecture .
fabric A fibre channel entity which interconnects
and facilitates logins of N_ports attached
to it. The fabric is responsible for routing
frames between source and destination
N_ports using address information in the
frame header. A fabric can be as simple as
a point-to-point channel between two
N-ports, or as complex as a frame-routing
switch that provides multiple and
redundant internal pathways within the
fabric between F_ports.
fabric port (F_port)
In a fabric, an access point for connecting
a user's N_port. An F_port facilitates
N_port logins to the fabric from nodes
connected to the fabric. An F_port is
addressable by the N_port connected to it.
See also
fabric .
FC See Fibre Channel .
FC-AL See arbitrated loop .
feature enable identifier
A unique identifier for the storage system,
which is used in the process of generating
a premium feature key. See also
premium
feature key .
Fibre Channel (FC)
A set of standards for a serial
input/output (I/O) bus capable of
transferring data between two ports at up
to 100 Mbps, with standards proposals to
go to higher speeds. FC supports
point-to-point, arbitrated loop, and
switched topologies.
Fibre Channel Arbitrated Loop (FC-AL)
See arbitrated loop .
Fibre Channel Protocol (FCP) for small computer
system interface (SCSI)
A high-level fibre-channel mapping layer
(FC-4) that uses lower-level fibre-channel
(FC-PH) services to transmit SCSI
commands, data, and status information
between a SCSI initiator and a SCSI target
across the FC link by using FC frame and
sequence formats.
field replaceable unit (FRU)
An assembly that is replaced in its
entirety when any one of its components
fails. In some cases, a field replaceable
unit might contain other field replaceable
units. Contrast with
customer replaceable
unit (CRU) .
FlashCopy
®
A premium feature for DCS3860 that can
make an instantaneous copy of the data
in a volume.
F_port See fabric port .
FRU See field replaceable unit .
GBIC See gigabit interface converter
gigabit interface converter (GBIC)
A transceiver that performs serial,
optical-to-electrical, and
electrical-to-optical signal conversions for
high-speed networking. A GBIC can be
hot swapped. See also
small form-factor
pluggable .
Global Copy
Refers to a remote logical drive mirror
pair that is set up using Global Copy
without the write consistency group
option. This is also referred to as
'Enhanced Global Mirroring without
Consistency Group'. Global Copy does
not ensure that write requests to multiple
primary logical drives are carried out in
the same order on the secondary logical
drives as they are on the primary logical
drives. If it is critical that writes to the
primary logical drives are carried out in
the same order in the appropriate
secondary logical drives, Global Mirroring
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IBM System Storage DCS3860 Storage System: Installation, User's, and Maintenance Guide