User's Manual

Glossary
DLT-V4 Product Specification 44
Positive Engagement Buckling Mechanism
A highly robust, solidly engineered
media leader-buckling mechanism for heavy-duty-cycle automated
environments.
POST Power-on Self-Test. When power is applied to the tape drive, it performs a
POST.
PRML Partial Response Maximum Likelihood is a method for converting the
weak analog signal from the head of a magnetic disk drive into a digital signal.
Also see Advanced PRML
.
PWA Printed Wiring Assembly.
R
Restore To replace data on the hard drive with data obtained from another
media device.
RoHS Restrictions on Hazardous Substances is an EU directive that restricts, and
in some cases bans, the use of certain compounds in the manufacture of electronic
equipment. RoHS mandates that new electrical and electronic equipment put on
the market does not contain lead, mercury, cadmium, hexavalent chromium,
poly-brominated biphenyls (PBB), or poly-brominated diphenyl ethers (PBDE).
S
SAN Storage Area Network.
SATA Serial Advanced Technology Attachment. A Serial ATA International
Organization (SATA-IO) standard for the interface between a computer and
peripheral controllers.
SCSI Small Computer System Interface. An American National Standards
Institute (ANSI) standard for the interface between a computer and peripheral
controllers.
SDLT Super Digital Linear Tape.
SE Single-ended SCSI Mode. A term referring to the electrical characteristics of
the signal used on the SCSI bus interface. For each signal that needs to be sent
across the bus, there exists a wire to carry it. SE SCSI uses one line for each signal,
with all lines using a common ground reference.
Seek The movement of a read/write head to a specific data track.
Server A powerful computer system with a large tape drive capacity that serves
the information access and communication needs of multiple users.
Shelf Life The length of time that media can be stored without losing its
magnetic strength. For VS1 media, this period is 30 years or more.
SI The International System of Units.
SRAM Static RAM. A memory chip that requires power to hold its content.