Silicon Graphics O2+ Hardware Reference Manual page 241

Glossary
root account
The standard IRIX login account reserved for use by the system administrator. This
account's home directory is the root (/) directory of the filesystem; the user of the root
account has full access to the entire filesystem (that is, this user can change and delete
any file or directory). The user of this account is sometimes referred to as the super-user.
See also administrator and system administrator.
root (/) directory
The directory at the top of the filesystem hierarchy. See also filesystem.
SCSI (Small Computer System Interface)
SCSI (pronounced "scuzzy") is a high-speed input/output specification for small
computers.
SCSI address
A number from one to seven that uniquely identifies a SCSI device to a system. No two
SCSI devices that are physically connected to the same workstation can have the same
SCSI address. See also SCSI.
SCSI address dial
A small plastic dial, supplied by SGI, that is connected to most external SCSI devices. You
click its small buttons to select a SCSI address for a new SCSI device. See also SCSI.
SCSI bus line
The combined length of all internal and external SCSI cables in a system. See also SCSI.
SCSI cable
A cable that connects a SCSI device to a SCSI port on a workstation. See also SCSI.
SCSI device
A hardware device that uses the SCSI protocol to communicate with the system. Hard
disks, floppy disks, floptical disks, CD-ROMs, and tape drives are all SCSI devices. See
also SCSI.
SCSI terminator
A metal cap that you plug into any open SCSI port on a SCSI bus line. No SCSI devices
on a SCSI bus line will work unless all SCSI ports are occupied by either cables or
terminators. See also SCSI.
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