EMC CX600 Configuration Guide - Page 144

Backup Terminology, Tape Library or Library - disk replacement

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February 3, 2003 EMC CLARiiON Open Systems Configuration Guide Backup Terminology Backup Client: A computer system that owns data that must be backed up, such as an application or database server. Note that computer systems typically referred to as servers (e.g., application servers, or database servers) are referred to as clients when discussing backup. Backup Control Data: Two types of data - (1) communications between the backup server and the backup client used to manage the backup process, and (2) catalog or index data that is written to disk. Backup Data: Data, owned by backup clients, which must be copied to backup media for the purposes of data protection. Backup data may be files, file systems, or databases. Backup Media: Storage media, typically magnetic tape, that holds backup data. Backup Server: A server running backup software, which controls the flow of backup data from backup clients to the backup media. In some topologies, the backup data may flow through the backup server. Backup Software: Software running on the backup server that controls the flow of backup data from backup clients to the backup media. Additionally, there is usually backup agent software running on the backup clients. Catalog: A collection of metadata that identifies the details of a backup, e.g., the names of the clients backed up, the names, files sizes, and dates of the data backed up, the location of the files on the backup media, etc. The catalogs are used to restore files. Also known as an index. Dedicated Tape Drive: A tape drive within a library that is statically and permanently associated with one backup client. A shared tape drive is one that is dynamically and temporarily associated to a backup client. Fibre-Channel-to SCSI bridge: A device that connects one or more Fibre Channel (FC) links to one or more SCSI buses. The primary purpose of a FC Bridge is to connect a tape library to a FC SAN. Index: A collection of metadata that identifies the details of a backup, e.g., the names of the clients backed up, the names, files sizes, and dates of the data backed up, the location of the files on the backup media, etc. The indices are used to restore files. Also known as a catalog. Library Changer: A robotic mechanism within a tape library that moves tape cartridges between storage shelves and tape drives. NIC: Network Interface Card. Note that EMC CLARiiON places no restrictions on the NICs used in backup servers or clients. Restore: The act of replacing lost or corrupt data on a client with the data that was backed up. Shared Tape Drive: A tape drive within a library that is dynamically and temporarily associated with a backup client. A dedicated tape drive is one that is statically and permanently associated with a backup client. Tape Library or Library: A device that houses one or more tape drives, a changer, and tape cartridges. Document Rev 19 Page 144 EMC Confidential

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February 3, 2003
EMC CLARiiON Open Systems Configuration Guide
Document Rev
19
Page 144
EMC Confidential
Backup Terminology
Backup Client:
A computer system that owns data that must be backed up, such as an application or database server.
Note that computer systems typically referred to as servers (e.g., application servers, or database servers) are referred
to as clients when discussing backup.
Backup Control Data:
Two types of data - (1) communications between the backup server and the backup client used
to manage the backup process, and (2) catalog or index data that is written to disk.
Backup Data:
Data, owned by backup clients, which must be copied to backup media for the purposes of data
protection. Backup data may be files, file systems, or databases.
Backup Media:
Storage media, typically magnetic tape, that holds backup data.
Backup Server:
A server running backup software, which controls the flow of backup data from backup clients to the
backup media. In some topologies, the backup data may flow through the backup server.
Backup Software:
Software running on the backup server that controls the flow of backup data from backup clients to
the backup media. Additionally, there is usually backup agent software running on the backup clients.
Catalog:
A collection of metadata that identifies the details of a backup, e.g., the names of the clients backed up, the
names, files sizes, and dates of the data backed up, the location of the files on the backup media, etc. The catalogs are
used to restore files. Also known as an index.
Dedicated Tape Drive:
A tape drive within a library that is statically and permanently associated with one backup
client. A shared tape drive is one that is dynamically and temporarily associated to a backup client.
Fibre-Channel-to SCSI bridge:
A device that connects one or more Fibre Channel (FC) links to one or more SCSI
buses. The primary purpose of a FC Bridge is to connect a tape library to a FC SAN.
Index:
A collection of metadata that identifies the details of a backup, e.g., the names of the clients backed up, the
names, files sizes, and dates of the data backed up, the location of the files on the backup media, etc. The indices are
used to restore files. Also known as a catalog.
Library Changer:
A robotic mechanism within a tape library that moves tape cartridges between storage shelves and
tape drives.
NIC:
Network Interface Card. Note that EMC CLARiiON places no restrictions on the NICs used in backup servers or
clients.
Restore:
The act of replacing lost or corrupt data on a client with the data that was backed up.
Shared Tape Drive:
A tape drive within a library that is dynamically and temporarily associated with a backup client.
A dedicated tape drive is one that is statically and permanently associated with a backup client.
Tape Library or Library:
A device that houses one or more tape drives, a changer, and tape cartridges.