communication between a supported
server and the TS3500 Tape Library. HVD
signaling uses a paired plus and minus
signal level to reduce the effects of noise
on the SCSI bus. Any noise injected into
the signal is present in both a plus and
minus state, and is thereby canceled.
Synonymous with differential.
homogeneous
Of the same kind.
host The controlling or highest-level system in
a data communication configuration.
Synonymous with server.
host bus adapter (HBA)
An adapter that provides I/O processing
and physical connectivity between a
server and storage.
host cleaning
A method that enables the host (server) to
detect the need to clean a tape drive and
to control the cleaning process. Host
cleaning with a cleaning cartridge is only
supported when automatic cleaning is
disabled, and only for the logical library
in which each cleaning cartridge is stored.
HTTP See Hyper Text Transfer Protocol.
hub A communications device to which nodes
on a multi-point bus or loop are
physically connected. Hubs are commonly
used in Fibre Channel networks to
improve the manageability of physical
cables. They maintain the logical loop
topology of the network of which they are
a part, while creating a “hub and spoke”
physical star layout. Unlike switches,
hubs do not aggregate bandwidth. They
typically support the addition or removal
of nodes from the bus while it is
operating.
HVD See High voltage differential.
Hyper Text Transfer Protocol (HTTP)
The primary Internet protocol that is used
to connect to most Web servers. HTTP
delivers content for web pages or
downloads files.
Hz Hertz.
I
IBM System Storage 3588 Tape Drive Model
F3A A data-storage device that controls the
movement of the magnetic tape in an IBM
LTO Ultrium Tape Cartridge. The drive
houses the mechanism (drive head) that
reads and writes data to the tape. Its
native data capacity is 400
®
GB (372.53
GiB) per cartridge; with 2:1 compression,
its capacity is up to 800 GB (745.05 GiB).
The Model F3A drive provides 2 Gbps
Fibre Channel connectivity. Also known
as the Ultrium 3 tape drive.
IBM System Storage Tape Library Specialist web
interface
A platform-independent, web-based
interface that allows a user to configure
and monitor the TS3500 Tape Library
from a remote location.
IBM System Storage TS1030 Tape Drive Model
F3B A data-storage device that controls the
movement of the magnetic tape in an IBM
LTO Ultrium Tape Cartridge. The drive
houses the mechanism (drive head) that
reads and writes data to the tape. Its
native data capacity is 400 GB (372.53
GiB) per cartridge; with 2:1 compression,
its capacity is up to 800 GB (745.05 GiB).
The Model F3B drive provides 4 Gbps
Fibre Channel connectivity. Also known
as the Ultrium 3 tape drive.
IBM System Storage TS1040 Tape Drive Model
F4A A data-storage device that controls the
movement of the magnetic tape in an IBM
LTO Ultrium Tape Cartridge. The drive
houses the mechanism (drive head) that
reads and writes data to the tape. Its
native data capacity is 800 GB (745.05
GiB) per cartridge; with 2:1 compression,
its capacity is up to 1.6 TB (1.46 TiB). The
Model F4A drive provides 4 Gbps Fibre
Channel connectivity. Also known as the
Ultrium 4 tape drive.
IBM System Storage TS1050 Tape Drive Model
F5A A data-storage device that controls the
movement of the magnetic tape in an IBM
LTO Ultrium Tape Cartridge. The drive
houses the mechanism (drive head) that
reads and writes data to the tape. Its
native data capacity is 1 500 GB (1396.98
GiB) per cartridge; with 2:1 compression,
its capacity is up to 3 000 GB (2793.97
GiB). The Model F5A drive provides 8
Gbps Fibre Channel connectivity. Also
known as the Ultrium 5 tape drive.
IBM System Storage TS1060 Tape Drive Model
F6A A data-storage device that controls the
Glossary 239
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