Glossary
154 ESL E-Series Tape Library User’s Guide
Check Condition status
Blocks of data are stored on the tape medium 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.
CISPR 22
This standard describes the emissions testing methods and 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
Class A equipment is intended for Commercial installation.
Class I laser product
Class 1 lasers are products where the power of the 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
Class 2 lasers are limited to a maximum output 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.
