US Robotics 7931 Guia do Utilizador descarregar pdf (Página 272)

248 Sun StorageTek SAM Archive Configuration and Administration Guide • Version 4, Update 6, 04/07

mcf Master configuration file. The file that is read at initialization time that defines

the relationships between the devices (the topology) in a file system

environment.

media Tape or optical disk cartridges.

media recycling The process of recycling or reusing archive media with few active files.

metadata Data about data. Metadata is the index information used to locate the exact

data position of a file on a disk. It consists of information about files,

directories, access control lists, symbolic links, removable media, segmented

files, and the indexes of segmented files.

metadata device A device (for example, a solid-state disk or mirrored device) upon which file

system metadata is stored. Having file data and metadata on separate devices

can increase performance. In the mcf file, a metadata device is declared as an

mm device within an ma file system.

mirror writing The process of maintaining two copies of a file on disjointed sets of disks to

prevent loss from a single disk failure.

mount point The directory on which a file system is mounted.

multireader file

system A single-writer, multireader capability that enables you to specify a file system

that can be mounted on multiple hosts. Multiple hosts can read the file system,

but only one host can write to the file system. Multiple readers are specified

with the –o reader option with the mount(1M) command. The single-writer

host is specified with the –o writer option with the mount(1M) command.

For more information on the mount(1M) command, see the mount_samfs(1M)

man page.

name space The metadata portion of a collection of files that identifies the file, its

attributes, and its storage locations.

nearline storage Removable media storage that requires robotic mounting before it can be

accessed. Nearline storage is usually less expensive than online storage, but it

takes somewhat longer to access.

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US Robotics 7931 Guia do Utilizador Página 272