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- Block_(data_storage) abstract "In computing (specifically data transmission and data storage), a block, sometimes called a physical record, is a sequence of bytes or bits, usually containg some whole number of records, having a maximum length, a block size. Data thus structured are said to be blocked. The process of putting data into blocks is called blocking, while deblocking is the process of extracting data from blocks. Blocked data is normally stored in a data buffer and read or written a whole block at a time. Blocking reduces the overhead and speeds up the handling of the data-stream. For some devices such as magnetic tape and CKD disk devices blocking reduces the amount of external storage required for the data. Blocking is almost universally employed when storing data to 9-track magnetic tape, to rotating media such as floppy disks, hard disks, optical discs and to NAND flash memory.Most file systems are based on a block device, which is a level of abstraction for the hardware responsible for storing and retrieving specified blocks of data, though the block size in file systems may be a multiple of the physical block size. This leads to space inefficiency due to internal fragmentation, since file lengths are often not integer multiples of block size, and thus the last block of a file may remain partially empty. This will create slack space, which averages half a block per file.Some newer file systems attempt to solve this through techniques called block suballocation and tail merging.Block storage is normally abstracted by a file system or database management system (DBMS) for use by applications and end users. The physical or logical volumes accessed via block I/O may be devices internal to a server, directly attached via SCSI or Fibre Channel, or distant devices accessed via a storage area network (SAN) using a protocol such as iSCSI, or AoE. DBMSes often use their own block I/O for improved performance and recoverability as compared to layering the DBMS on top of a file system.".
- Block_(data_storage) wikiPageID "313667".
- Block_(data_storage) wikiPageRevisionID "606392031".
- Block_(data_storage) hasPhotoCollection Block_(data_storage).
- Block_(data_storage) type Abstraction100002137.
- Block_(data_storage) type Arrangement105726596.
- Block_(data_storage) type ClassificationSystem105727220.
- Block_(data_storage) type Cognition100023271.
- Block_(data_storage) type ComputerFileSystems.
- Block_(data_storage) type DefiniteQuantity113576101.
- Block_(data_storage) type FileSystem105732614.
- Block_(data_storage) type Measure100033615.
- Block_(data_storage) type PsychologicalFeature100023100.
- Block_(data_storage) type Structure105726345.
- Block_(data_storage) type UnitOfMeasurement113583724.
- Block_(data_storage) type UnitsOfInformation.
- Block_(data_storage) comment "In computing (specifically data transmission and data storage), a block, sometimes called a physical record, is a sequence of bytes or bits, usually containg some whole number of records, having a maximum length, a block size. Data thus structured are said to be blocked. The process of putting data into blocks is called blocking, while deblocking is the process of extracting data from blocks. Blocked data is normally stored in a data buffer and read or written a whole block at a time.".
- Block_(data_storage) label "Block (data storage)".
- Block_(data_storage) label "Bloco (informática)".
- Block_(data_storage) label "Bloque (informática)".
- Block_(data_storage) label "Datenblock".
- Block_(data_storage) label "ブロック (データ)".
- Block_(data_storage) label "块 (数据存储)".
- Block_(data_storage) sameAs Datenblock.
- Block_(data_storage) sameAs Bloque_(informática).
- Block_(data_storage) sameAs ブロック_(データ).
- Block_(data_storage) sameAs 블록_(컴퓨팅).
- Block_(data_storage) sameAs Bloco_(informática).
- Block_(data_storage) sameAs m.01tjzv.
- Block_(data_storage) sameAs Q1146944.
- Block_(data_storage) sameAs Q1146944.
- Block_(data_storage) sameAs Block_(data_storage).
- Block_(data_storage) wasDerivedFrom Block_(data_storage)?oldid=606392031.
- Block_(data_storage) isPrimaryTopicOf Block_(data_storage).