
Glossary
New Template 183
Reed-Solomon error correction An error correction technique based
on research done by Irving reed and Gustave Solomon at MIT’s
lincoln Laboratory in the 1960s. First used to check the accuracy
of data received from the Voyager spacecraft.
restore To replace data on the hard drive from another media source.
ROM Read Only Memory. Integrated circuit chip containing programs
and data that can be accessed and read but cannot be
modified.
S SCSI Small Computer System Interface. An American National
Standards Institute (ANSI) interface between the computer and
peripheral controllers. Apple MacIntosh systems and many UNIX
operating system workstations use the SCSI interface.
scalability Refers to the capability provided by the DLT tape drive
family to read tapes from previous generations of drives. Allows
users to upgrade to a faster, higher capacity DLT drive, yet still
be able to read tape recorded on an older system. The term also
refers to the ability of DLT tape library systems to be upgraded
with a higher performance DLT drive and thus provide more
capacity and performance in the same footprint. See backward
compatibility.
seek The movement of a read/write head to a specific data track.
self cleaning head Found in all DLT tape drives. Tiny ridges on either
side of the DLT drive read/write head continuously wipe the tape
clean as it passes over the head. This is why there is no periodic
cleaning prescribed for DLT tape drives.
server A powerful computer system with a large hard disk drive that
serves the information access and communication needs of
multiple users. Often servers are dedicated to a particular
function such as Internet access, printing, file management,
backup, and network communications.
servo data Magnetic markings written on the media that guide the
read/write heads to the proper position.
shelf life The length of time that a tape can be stored without losing
its magnetic strength. For DLTtape media, this period is 30 years
or more.
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