G-Technology G-RACK 12, User Manual

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Glossary
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a network, based on Coordinated Universal Time (UTC).
Operating System -
Software that allows users and programs installed on your system to
communicate with computer hardware such as a hard drive.
Parity -
Data created in volumes with RAID 5 protection that’s used to reconstruct files if one of the
disk drives in the server fails. See also RAID 5.
Partition -
A logical division on a hard drive that the operating system treats as a separate hard
drive. Each partition is assigned a unique drive letter.
Port (Hardware) -
A specialized outlet on a device for connecting to other devices using a cable or a
plug. Ethernet ports, power ports, and USB ports are examples.
Port aggregation -
A method of increasing the speed of a device’s network connection by using
more than one Ethernet port simultaneously to connect to the network.
Protocol -
A convention of data transmission that defines timing, control format, and data
representation.
RAID -
Redundant Array of Independent Disks. A technology that combines disk drives together for
improved performance and fault tolerance (the ability to withstand the failure of a disk drive). RAID
10 - A level of RAID protection. A volume with RAID 10 is built from two or more equal- sized RAID
1 volumes. Data in a volume with RAID 10 is both striped and mirrored. Mirroring provides data
protection, and striping improves performance. See also mirror, and stripe.
RAID 5 -
A level of RAID protection. A volume with RAID 5 is built from a minimum of three disk
drives, and uses data striping and parity data to provide redundancy. (Parity is extra information
that’s used to re-create data if a disk drive fails. In volumes with RAID 5, parity data is striped evenly
across the disk drives with the stored data.) Parity data provides data protection, and striping
improves performance. See also stripe.
RAM -
Random Access Memory. Memory that allows any storage location to be accessed randomly,
as opposed to sequential access devices such as tape drives.
Remote access -
Access to the server from a computer that is not on your local network. For
instance, accessing the server from a client’s computer, over the Internet, is remote access. Remote
access can also refer to shutting down or resetting the server using G-RACK 12 Administrative Tool
instead of physically pressing the Power button. See also local access.
ROM -
Read-Only Memory. An integrated circuit memory chip containing programs and data that
the computer or host can read but cannot modify. A computer can read instructions from ROM but
cannot store data in ROM.
RSA key -
An encryption decoder that’s part of SSL, a type of encryption used to protect data being
sent over a network or the Internet. “RSA” stands for Rivest, Shamir, and Adelman, who invented the