Dell PowerVault TL4000 - Manual (Page 281)

Glossary
This glossary defines the special terms, abbreviations, and acronyms that are used
in this publication. If you do not find the term that you are looking for, refer to the
index or to the Dictionary of Computing, 1994.
Numbers
2:1 compression
The relationship between the quantity of data that can be stored with
compression as compared to the quantity of data that can be stored
without compression. In 2:1 compression, twice as much data can be stored
with compression as can be stored without compression.
A
A Ampere.
ac Alternating current.
access method
A technique for moving data between main storage and input or output
devices.
accessor
This component contains the library robot and bar code reader. The
accessor moves cartridges to and from the I/O Station, storage slots, and
tape drives.
adapter card
A circuit board that adds function to a computer.
adj Adjustment.
AH Authentication Header. An Internet Protocol intended to guarantee
connectionless integrity and data origin authentication of IP datagrams.
Further, it can optionally protect against replay attacks by using the sliding
window technique and discarding old packets.
alphanumeric
Pertaining to a character set that contains letters, numerals, and other
characters, such as punctuation marks.
alter To change.
ambient temperature
The temperature of air or other media in a designated area, particularly the
area that is surrounding equipment.
AME Application Managed Encryption.
ampere (A)
A unit of measure for electric current that is equivalent to a flow of 1
coulomb per second, or to the current produced by 1 volt applied across a
resistance of 1 ohm.
ANSI American National Standards Institute.
application-managed encryption
Tape encryption that is controlled by an application.
I-1