Quantum P4000 User Manual page 158

Glossary
138
Check Condition status
along with additional information that the library controller uses to
manage storage and retrieval. The format of the additional information is
unique and is hidden from the initiator during normal read or write
operations. This additional information is often used to identify the
physical location of the blocks of data and the address of the logical block,
and to provide protection against the loss of the user data.
The address of the first logical block is zero. The address of the last logical
block is [n-1], where [n] is the number of logical blocks available on the
medium. A Read Capacity command may be issued to determine the
value of [n-1]. If a command is issued that requests access to a logical
block not within the capacity of the medium, the command is terminated
with CHECK CONDITION.
This standard describes the emissions testing methods and
CISPR 22
test limits for information technology equipment, such as computers,
office machines, or telecommunications equipment connected to low -
voltage power main networks (<600V). It does not apply to equipment
whose primary function is radio transmission or reception as defined by
the International Telecommunications Union (ITU) Radio Regulations.
The object of the standard is to establish uniform requirements for the
conducted and radiated disturbance levels of the equipment covered by
the standard. Disturbance limits are established for Class A and Class B
equipment, and measurement methods, operating conditions, and
interpretation of results are addressed.
Class A digital device
installation.
Class I laser product
laser beam produced (the accessible emission) is always below the
Maximum Permissible Exposure value. Therefore, for Class 1 lasers the
output power is below the level at which it is believed eye damage will
occur. Exposure to the beam of a Class 1 laser will not result in eye injury.
Class 1 lasers may therefore be considered eye safe.
Class II laser product
power of 1 mW. A person receiving an eye exposure from a Class 2 laser,
either accidentally or as a result of someone else's deliberate action
(misuse) will be protected from injury by their natural blink reflex. This is
a natural involuntary response which causes the individual to blink and
avert their head thereby terminating the eye exposure.
Quantum P4000 and P7000 Libraries User's Guide
Blocks of data are stored on the tape medium
Class A equipment is intended for Commercial
Class 1 lasers are products where the power of the
Class 2 lasers are limited to a maximum output