| Sun StorageTek Common Array Manager User Guide for Open Systems |     |
|
Glossary |
Definitions obtained from the Storage Networking Industry Association (SNIA) Dictionary are indicated with “(SNIA)” at the end. For the complete SNIA Dictionary, go to www.snia.org/education/dictionary.
A type of event that requires service action. See also event.
A subtype of an event that requires user intervention. The term actionable event often describes an alert. See also event.
Multiple disk drives that function as a single storage device. A high-availability (HA) array configuration has redundant controllers and expansion trays of disk drives.
A disk that serves as a hot-spare within an array as part of the storage pool; a reserve disk that can be made available to all virtual disks within an array. See also in-band traffic.
The amount of data sent or received by the host per I/O operation; the size of a data unit.
The amount of storage you must allocate to storage elements, including volumes, pools, and virtual disks. Capacity planning should include allocations for volume snapshots and volume copies.
The route used for communication of system management information, usually an out-of-band connection.
See site LAN.
Customer replaceable unit. See also FRU.
See direct attached storage (DAS).
Any host that uses the system for storage. A data host can be connected directly to the array (direct attach storage, or DAS) or can be connected to an external switch that supports multiple data hosts (storage area network, or SAN). See also host.
The route taken by a data packet between a data host and the storage device.
A storage architecture in which one or two hosts that access data are connected physically to a storage array.
A physical drive component that stores data.
Are at ends relative to the expander. They are both initiating devices (host initiators on servers) and storage target devices such as disk or flash drives. See also expander devices.
a physical device with ports to connect devices. SAS access configuration is implemented in expander devices in one or more arrays.
The expander devices controls which physical connections (PHYs) can be made between end devices. Expanders may be connected to each other via inter-expander links to form a cascade or daisy-chain.
A notification of something that happened on a device. There are many types of events, and each type describes a separate occurrence. See also alarm and alert.
A set of contiguous blocks with consecutive logical addresses on a physical or virtual disk.
The process of changing the data path automatically to an alternate path.
The percentage of faults detected against all possible faults or against all faults of a given type.
See Fibre Channel (FC).
A set of standards for a serial I/O bus capable of transferring data between two ports at up to 100 megabytes/second, with standards proposals to go to higher speeds. Fibre Channel supports point to point, arbitrated loop, and switched topologies. Fibre Channel was completely developed through industry cooperation, unlike SCSI, which was developed by a vendor and submitted for standardization after the fact. (SNIA)
A networking device that can send packets directly to a port associated with a given network address in a Fibre Channel storage area network (SAN). Fibre Channel switches are used to expand the number of servers that can connect to a particular storage port. Each switch is managed by its own management software.
Field replaceable unit. See also CRU.
A representation of a data host that is mapped to initiators and volumes to create a storage domain. See also data host, initiator.
An I/O adapter that connects a host I/O bus to a computer’s memory system. (SNIA) See also initiator.
A group of hosts with common storage characteristics that can be mapped to volumes. See also host.
System management traffic that uses the data path between a host and a storage device. See also out-of-band traffic.
A system component that initiates an I/O operation over a Fibre Channel (FC) network. If allowed by FC fabric zoning rules, each host connection within the FC network has the ability to initiate transactions with the storage array. Each host in the FC network represents a separate initiator, so if a host is connected to the system through two host bus adapters (HBAs), the system identifies two different initiators (similar to multi-homed, Ethernet-based hosts). In contrast, when multipathing is used in round-robin mode, multiple HBAs are grouped together, and the multipathing software identifies the group of HBAs as a single initiator.
A measure of transaction speed, representing the number of input and output transactions per second.
The SCSI identifier for a volume as it is recognized by a particular host. The same volume can be represented by a different LUN to a different host.
See logical unit number (LUN).
See media access control (MAC) address.
A Solaris OS host serving the configuration, management, and monitoring software for the Sun StorageTek Common Array Manager. The software on the station can be accessed with a browser to run the browser interface or with a remote scripting command-line interface (CLI) client to access the SSCS CLI commands.
A design for reliability that uses redundant configuration. Array configurations share master/alternate master configurations: each array configuration has two controller trays that are grouped as one host. In each case, the master component uses the IP address and name. If the master fails, the alternate master assumes the IP address and name and takes over the master’s functions.
media access control (MAC) address
The physical address identifying an Ethernet controller board. The MAC address, also called an Ethernet address, is set at the factory and must be mapped to the IP address of the device.
A design for redundancy that provides at least two physical paths to a target.
System management traffic outside of the primary data path that uses an Ethernet network. See also in-band traffic.
A single SAS physical connection. The supported arrays have x4 SAS ports requiring 4 PHYs.
An acronym for Redundant Array of Independent Disks, a family of techniques for managing multiple disks to deliver desirable cost, data availability, and performance characteristics to host environments. (SNIA)
Monitoring of the functions and performance of a hardware system from a location other than where the hardware resides.
A command-line interface (CLI) that enables you to manage the system from a remote management host. The client communicates with the management software through a secure out-of-band interface, HTTPS, and provides the same control and monitoring capability as the browser interface. The client must be installed on a host that has network access to the system.
See storage area network (SAN).
A group of SAS expander devices and end devices that are physically connected. When SAS expanders are connected, they form one SAS domain.
The local area network at your site. When the system is connected to your LAN, the system can be managed through a browser from any host on the LAN.
An copy of a volume’s data at a specific point in time.
Sun Storage Command System. The command-line interface (CLI) that can be used to manage the array.
An architecture in which the storage elements are connected to each other and to a server that is the access point for all systems that use the SAN to store data.
An enclosure containing disks. A tray with dual RAID controllers is called a controller tray; a tray without controllers is called an expansion tray.
The system component that receives a SCSI I/O command. (SNIA)
See remote scripting CLI client.
See storage tray.
World Wide Name. A unique 64-bit number assigned by a recognized naming authority such as the Institute of Electrical and Electronics Engineers (IEEE) that identifies a connection (device) or a set of connections to the network. The World Wide Name (WWN) is constructed from the number that identifies the naming authority, the number that identifies the manufacturer, and a unique number for the specific connection.
| Sun StorageTek Common Array Manager User Guide for Open Systems | 820-6663-11 | |
Copyright © 2009 Sun Microsystems, Inc. All rights reserved.