Access control list. A list that contains the users' or groups' access rights to each share.
A SCSI card, network card, hot swap adapter card, serial adapter card, or VGA adapter that plugs into a filer expansion slot.
The procedure for determining a Media Access Control (MAC) address corresponding to the address of a LAN or WAN destination.
The client you specify during filer setup for managing the filer. The setup program automatically configures the filer to accept telnet and rsh connections from this client, to give permission to this client for mounting the / and /home directories, and to use this client as the mail host for sending autosupport email messages. At any time after you run the setup program, you can configure the filer to work with other clients in the same way as it does with the administration host.
A Data ONTAP process that gathers status and diagnostic information and forwards it to NMSs.
A device that performs a well-defined function and is easy to install and operate.
Asynchronous Transfer Mode. A network technology that combines the features of cell-switching and multiplexing to offer reliable and efficient network services. ATM provides an interface between devices such as workstations and routers, and the network.
A security step performed by a domain controller for the filer's domain, or by the filer itself, using its /etc/passwd file.
A filer daemon that triggers email messages from the customer site to Network Appliance or another specified email recipient when there is a potential filer problem.
A binary data format for storage and transmission in which the most significant bit or byte comes first.
Common Internet File System. A protocol for networking PCs.
A computer that shares files on a filer.
A pair of filers connected so that one filer can detect when the other is not working and, if so, can serve the failed filer data.
Cables and adapters with which the two filers in a cluster are connected and over which heartbeat and WAFL log information are transmitted when both filers are running.
Software that administers the relationship of filers in the cluster through the cf command.
A name used as a password by the SNMP manager to communicate with the filer agent.
A terminal that is attached to a filer's serial port and is used to monitor and manage filer operation.
The technique for creating snapshots without consuming excess disk space.
The operating mode of a filer when a disk is missing from the RAID array or the batteries on the NVRAM card are low.
A number assigned by the filer to each disk when it probes the disks at boot time.
A shelf that contains disk drives and is attached to the filer.
A software copy of the failed filer that is hosted by the takeover filer. The emulated filer appears to users and administrators like a functional version of the failed filer. For example, it has the same name as the failed filer.
An Ethernet interface card.
A SCSI card, NVRAM card, network card, hot swap card, or console card that plugs into a filer expansion slot.
The slots on the system board in which you insert expansion cards.
The physical filer that has ceased operating. It remains the failed filer until giveback succeeds.
A Fiber Distributed Data Interface (FDDI) interface card.
An FDDI adapter that supports a fiber-optic cable.
An FDDI adapter that supports a twisted-pair cable.
Group identification number.
The return of identity from the virtual filer to the failed filer, resulting in a return to normal operation; the reverse of takeover.
A group of users defined in the filer's /etc/group file.
A repeating signal transmitted from one filer to the other that indicates that the filer is in operation. Heartbeat information is also stored on disk.
A disk installed in the filer that can be used to substitute for a failed disk. Before the disk failure, the hot spare disk is not part of the RAID disk array.
The process of adding, removing, or replacing a disk while the filer is running.
An expansion card that makes it possible to add or remove a hard disk with minimal interruption to file system activity.
A data structure containing information about files on a filer and in a UNIX file system.
A switch on some filer front panels used for debugging purposes.
The architecture, protocols, and services that create an Emulated LAN using ATM as an underlying network topology. LANE enables ATM-connected end systems to communicate with other LAN-based systems.
The filer you are logged in to.
A directory that can be accessed by name but does not show up in a directory listing. The .snapshot directories, except for the one at the mount point or at the root of the share, are magic directories.
One of a set of disks owned by each filer that is used to store the cluster state information of the filer. If that filer stops operating, the takeover filer uses the information in the mailbox disks in constructing a virtual filer. Mailbox disks are also used as file system disks.
The client host responsible for sending automatic email to Network Appliance when certain filer events occur.
An option when booting a filer from a system boot disk. Maintenance mode provides special commands for troubleshooting hardware and configuration.
Management Information Base. An ASCII file that describes the information that the agent forwards to NMSs.
Multipurpose Internet Mail Extensions. A specification that defines the mechanisms for specifying and describing the format of Internet message bodies. An HTTP response containing the MIME Content-Type header allows the HTTP client to start the application that is appropriate for the data received.
An optional software product that enables you to partition the storage and network resources of a single filer so that it appears as multiple filers on the network.
Network Data Management Protocol. A protocol that allows Network Appliance filers to communicate with backup applications, and provides capabilities for controlling the robotics of multiple tape backup devices.
An Ethernet, FDDI, or Asynchronous Transfer Mode (ATM) adapter.
See NMS.
Network Management Station. A host on a network that uses third-party network management application (SNMP manager) to process status and diagnostic information about a filer.
The state of a filer when there is no takeover in the cluster.
Nonvolatile RAM in the filer, used for logging incoming write data and NFS requests. Improves system performance and prevents loss of data in case of a filer or power failure.
An adapter card that contains the filer's NVRAM cache.
A synchronously updated copy of the contents of the filer NVRAM (Nonvolatile Random Access Memory) contents kept on the partner filer.
A serious error condition causing the filer to halt. Similar to a software crash in the Windows system environment.
The disk on which parity information is stored for the RAID-4 disk drive array. Used to reconstruct data in failed disk blocks or on a failed disk.
From the point of view of the local filer, the other filer in the cluster.
The method you use to communicate through the command-line interface with the virtual filer during a takeover.
Peripheral Component Interconnect. The bus architecture used in newer filer models.
A filer daemon that permits PCs to mount filer file systems. The corresponding PC client software is called (PC)NFS.
Primary Domain Controller. The domain controller that has negotiated to be, or has been assigned as, the primary authentication server for the domain.
Power-on self-tests. The tests run by the filer after the power is turned on.
Permanent Virtual Circuit. A link with a static route defined in advance, usually by manual setup.
A special subdirectory of the root of a volume that acts as a virtual subvolume with special attributes.
Redundant array of independent disks. A technique that protects against disk failure by computing parity information based on the contents of all the disks in the array. NetApp filers use RAID Level 4, which stores all parity information on a single disk.
The process in which the system reads each disk in the RAID group and tries to fix media errors by rewriting the data to another disk area.
An expansion card that supports the SCSI disk drives and tape drives.
The full address of a disk, consisting of the disk's SCSI adapter number and the disk's SCSI ID; for example, 9a.1.
The number of a disk drive on the SCSI chain (0 to 6).
An expansion card for attaching a terminal as the console on some filer models.
An ASCII or ANSI terminal attached to a filer's serial port. Used to monitor and manage filer operations.
A directory or directory structure on the filer that has been made available to network users and can be mapped to a drive letter on a CIFS client.
Security identifier.
An online, read-only copy of the entire file system that protects against accidental deletions or modifications of files without duplicating file contents. Snapshots enable users to restore files and to back up the filer to tape while the filer is in use.
Switched Virtual Circuit. A connection established through signaling. The user defines the endpoints when the call is initiated.
A printed circuit board that contains the filer's CPU, expansion bus slots, and system memory.
The emulation of the failed filer identity by the takeover filer in a cluster; the reverse of giveback.
A filer that remains in operation after the other filer stops working and that hosts a virtual filer that manages access to the failed filer disk shelves and network connections. The takeover filer maintains its own identity and the virtual filer maintains the failed filer identity.
The method you use to interact with a filer while it has taken over its partner. The console prompt indicates when the filer is in takeover mode.
An asynchronous, unsolicited message sent by an SNMP agent to an SNMP manager indicating that an event has occurred on the filer.
A type of disk quota that restricts the disk usage of a directory created by the quota qtree command. Different from user and group quotas that restrict disk usage by files with a given UID or GID.
User identification number.
A 16-bit character set standard. It was designed and is maintained by the nonprofit consortium Unicode Inc.
Virtual Channel Identifier. A unique numerical tag defined by a 16-bit field in the ATM cell header that identifies a virtual channel over which the cell is to travel.
A virtual filer you create using MultiStore, which enables you to partition the storage and network resources of a single filer so that it appears as multiple filers on the network.
An expansion card for attaching a VGA terminal as the console.
A file system.
Virtual Path Identifier. An eight-bit field in the ATM cell header that indicates the virtual path over which the cell should be routed.
Write Anywhere File Layout. The WAFL file system was designed for the Network Appliance filer to optimize write performance.
Windows Internet Name Service.
A collection of computers running Windows NT or Windows for Workgroups that is grouped for browsing and sharing.
Copyright © 1994-2003, Network Appliance, Inc. All rights
reserved.
Part No. 210-00323
File: gloss.htm
Last updated: 01/15/03 15:46:16