Dot Hill Systems 200 manual Fc-Al, Fru, Gbic, Hba

fast write	Allows disk write commands to be safely acknowledged to the host before the data is
	actually written to the disk media. This can be enabled/disabled through the storage
	management software.
fast/wide SCSI	Data transfer rate of 20 MB/sec. Wide devices can be connected to a standard SCSI
	interface but the extra data lines need to be terminated.
fault tolerance	The capacity to cope with internal hardware problems without interrupting the array's data
	availability, often by using backup systems brought online when a failure is detected.
	Many arrays provide fault tolerance by using RAID architecture to give protection against
	loss of data when a single disk drive fails. Using RAID 1 (mirroring), RAID 3 or 5
	(striping with parity), or RAID 6 or 1+0 (mirroring and striping) techniques, the array
	controller can reconstruct data from a failed drive and write it to a standby or replacement
	drive.
fault tolerant	A logical drive that provides protection of data in the event of a single drive failure by
logical drive	employing RAID 1, 3, 5, or 6 (also known as RAID 1+0).
FC-AL	Fibre Channel-Arbitrated Loop. FC-AL is implemented as either a loop or a Fabric. A
	loop can contain up to 126 nodes, accessible through only one or two servers.
fibre channel	A cost-effective gigabit communications link deployed across a wide range of hardware.
fibre channel	Fibre channel adapters of a host computer, server, or workstation.
HBAs
fibre hubs	An Arbitrated Loop Hub is a wiring concentrator. "Arbitrated" means that all nodes
	communicating over this Fibre loop are sharing a 100MBps segment. Whenever more
	devices are added to a single segment, the bandwidth available to each node is further
	divided. A loop configuration allows different devices in the loop to be configured in a
	token ring style. With a Fibre Hub, a Fibre loop can be re-arranged in a star-like
	configuration for the Hub itself contains port bypass circuitry that forms an internal loop
	inside. Bypass circuits can automatically reconfigure the loop once a device is removed or
	added without disrupting the physical connection to other devices.
FRU	Field-Replaceable Unit
full-duplex	Data transmission in both directions at the same time. See also half-duplex and simplex.
GB	Gigabyte. 1,000,000,000 (one billion) bytes.
GBIC	Gigabit Interface Converter. A hot-swappable input/output device that plugs into a Gigabit
	Ethernet port or Fibre Channel.
groups	A group is a new data object that allows multiple servers to be contained under a single
	category, are similar in concept to domains, and allow you to organize servers within
	SANscape. Instead of a linear tree of all the managed servers, the SANscape operator can
	organize the servers into like sets or groups. In the case where many servers are present,
	groups allow more icons to appear at the same time in the main SANscape window
	without scrolling. Groups are not required. You can configure SANscape for no groups
	and fifteen servers, for example, or for one group with ten servers underneath, with an
	additional five at the top level. SANscape allows any combination. The number of groups
	permitted and the number of servers within a group is limited only by available array
	memory. If a server is a member of a group and a user deletes that group from the group
	list box, SANscape reassigns the servers in that group to the no group category. SANscape
	automatically remaps the tree in the main window.
half-duplex	Refers to an interface, such as SCSI, that can transmit data in only one direction at a time.
	See also full-duplex and simplex.
HBA	Host Bus Adapter
host bus adapter	A card that connects a peripheral device to the computer system's I/O bus.
hot plug	The ability to remove, replace, or add a device while current I/O processes continue.

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