Storage terms starting with R

62 terms

  1. R1 The first-generation offspring of a recombinant (genetically modified) organism. Not standard terminology. See: T0, T1, and T2.
  2. R2 The Symmetrix term indicating the remote data copy that is the secondary copy. It is normally read-only by the nodes at the remote site.
  3. RADIUS Horizontal distance from the center of rotation.
  4. RAID A raid is a large-scale attack on an area by a group of players.
  5. RAID (Redundant Array of Independent Disk) Redundant Array of Inexpensive Disks. A technology in which data is stored in distributed fashion across multiple disk drives to achieve redundancy and…
  6. RAID (Redundant Array of Independent Disks) A method of accessing multiple individual disks as if the array were one larger disk, spreading data access out over these multiple disks.
  7. RAID (Redundant Array of Independent or Inexpensive Disks) "Redundant Array of Independent Drives", originally known as Redundant Array of Inexpensive Drives, RAID is an umbrellaterm for data storage schemes that…
  8. RAID 0 (striped disks without parity) Block striping across multiple drives is provided, yielding higher performance than is possible with individual drives.
  9. RAID 1 (mirrored disks without parity) Provides data protection by duplicating all data from a primary drive on a secondary drive. Drives are paired and mirrored.
  10. RAID 10 (mirrored disks in a striped set) Combines RAID 0 striping and RAID 1 mirroring. This level provides redundancy through mirroring.
  11. RAID 5 (striped disks with distributed parity) Data is striped across several physical drives. For data redundancy, drives use parity to store and recover data.
  12. RAID 50 (stripe across distributed parity RAID) Combines multiple RAID 5 sets with RAID 0 (striping).
  13. RAID 6 (striped disks with dual distributed parity) Data is striped across several physical drives and uses dual parity to store and recover data.
  14. RAID disk scrubbing The process by which the system reads each disk in the RAID group and tries to fix media errors by rewriting the data to another disk area.
  15. RAID group A set of data disks and a parity disk that implement RAID 4.
  16. RAID Level Migration A process to change the RAID level of an existing RAID array without taking the server offline. Also known as Morphing.
  17. RAID Levels RAID levels refer to different array architectures that offer various advantages in terms of data availability, cost, and performance.
  18. RAID Management Software Software that makes installation, configuration, and management of RAID arrays easy.
  19. RAIL (Redundant Array of Independent Libraries) for tape libraries what RAID is for DASD. See RAID.
  20. RAIT (Redundant Array of Independent Tape) for tapes what RAID is for DASD. See RAID.
  21. RARP Reverse Address Resolution Protocol. A way of converting Ethernet addresses to IP addresses.
  22. reader server The component of a news server that obtains the data that the news cache requests from the news storage device.
  23. Real Time Streaming Protocol (RTSP) An open standard for delivery of real-time media over the Internet.
  24. Real-time Transport Control Protocol (RTCP) A feedback protocol that provides QoS information to the streaming server. The RTCP feedback mechanism periodically describes the state of the network so…
  25. Real-time Transport Protocol (RTP) An Internet protocol for the transmission of real-time data, including voice and video.
  26. Recommended Release (RR) Former term for General Availability (GA). See "GA."
  27. Recovery Cluster A cluster on which recovery of a package takes place following a failure on the cluster.
  28. recovery group failover A failover of a package recovery group from one cluster to another.
  29. recovery package The package that takes over on the Recovery Cluster in the event of a failure on the cluster.
  30. Redundancy The inclusion of duplicate or alternate system elements to improve operational reliability by ensuring continued operation in the event that a primary…
  31. redundant array of independent disks (RAID) NetApp appliances use RAID 4, which protects against disk failure by computing parity information based on the contents of all the disks in the array.
  32. Refreshing This term can refer to periodic retensioning of tape, or the rerecording of recorded information onto the same tape (or different tape) to refresh the…
  33. regional disaster A disaster, such as an earthquake or hurricane, that affects a large region. Local, campus, and proximate metropolitan clusters are less likely to protect…
  34. Relative humidity (RH) The amount of water in the air relative to the maximum amount of water that the air can hold at a given temperature.
  35. Remote Authentication Dial-In User Service (RADIUS) A client-server protocol for accessing a directory service. NetCache can be configured to point to a RADIUS server for authentication of user requests.
  36. remote failover Failover to a node at another data center or remote location.
  37. Remote Shell A program that enables a user on one system to execute a program on another system.
  38. Replication The in vivo synthesis of double-stranded DNA by copying from a single-stranded template.
  39. request for enhancement (RFE) Request for change or enhancement to an existing system or application.
  40. Restoration The process of returning, as nearly as possible, a building or any of its parts to its original form and condition.
  41. Restore To transfer data from a backup medium (such as tapes) to an on-line system, often for the purpose of recovery from a problem, failure, or disaster.
  42. resynchronization The process of making the data between two sites consistent and current once systems are restored following a failure. Also called data resynchronization.
  43. Retensioning The process where a tape is unspooled onto a take-up reel and then rewound at a controlled tension and speed.
  44. return material authorization (RMA) Paperwork for returning a product to the manufacturer.
  45. Reverse Address Resolution Protocol (RARP) A way of converting Ethernet addresses to IP addresses.
  46. reverse proxy A specific deployment of a proxy server as a front-end accelerator between the origin servers and the incoming user connections.
  47. RFE Request For Enhancement. Request for change or enhancement to an existing system or application.
  48. RH Abbreviation for recombinant human.
  49. RMA (1) Reliability, Maintainability and Availability (see RAM) (ILS term). (2) Revolution in Military Affairs (OSD term).
  50. RMM (ReMovable Media) IBM's tape management software product.
  51. ROC (Raid on Chip) Single chip that provides hardware RAID protection by combining features and functionality that previously required separate components; a single chip…
  52. rolling disaster A second disaster that occurs before recovering from a previous disaster, e.g. while data is being synchronized between two data centers after a disaster…
  53. ROMB (RAID on Motherboard) A solution that is extremely cost-effective and compact in its design because all of the components of the RAID device are included on the motherboard.
  54. Room ambient conditions The temperature, humidity, and air quality of the surrounding conditions. Those conditions generally found in a library, resource, studio, or office…
  55. root volume The volume that a NetApp appliance first looks at when booting to obtain configuration information.
  56. RR Redridge Mountains
  57. RSA Russian Space Agency.
  58. rsh The command used to establish a Remote Shell connection.
  59. RTCP Real-time Transport Control Protocol. A feedback protocol that provides QoS information to the streaming server.
  60. RTD (Real Tape Drive) a physical tape drive. See VTD.
  61. RTP Real-time Transport Protocol. An Internet protocol for the transmission of real-time data, including voice and video.
  62. RTSP Real Time Streaming Protocol. An open standard for delivery of real-time media over the Internet.