LBA

LBA or lba may refer to:

Science

Technology

Transport

Other

Logical block addressing

Logical block addressing (LBA) is a common scheme used for specifying the location of blocks of data stored on computer storage devices, generally secondary storage systems such as hard disk drives. LBA is a particularly simple linear addressing scheme; blocks are located by an integer index, with the first block being LBA 0, the second LBA 1, and so on.

The IDE standard included 22-bit LBA as an option, which was further extended to 28-bit with the release of ATA-1 (1994) and to 48-bit with the release of ATA-6 (2003), whereas the size of entries in on-disk and in-memory data structures holding the address is typically 32 or 64 bits. Most hard disk drives released after 1996 implement logical block addressing.

Overview

In logical block addressing, only one number is used to address data, and each linear base address describes a single block.

The LBA scheme replaces earlier schemes which exposed the physical details of the storage device to the software of the operating system. Chief among these was the cylinder-head-sector (CHS) scheme, where blocks were addressed by means of a tuple which defined the cylinder, head, and sector at which they appeared on the hard disk. CHS did not map well to devices other than hard disks (such as tapes and networked storage), and was generally not used for them. CHS was used in early MFM and RLL drives, and both it and its successor, extended cylinder-head-sector (ECHS), were used in the first ATA drives. However, current disk drives use zone bit recording, where the number of sectors per track depends on the track number. Even though the disk drive will report some CHS values as sectors per track (SPT) and heads per cylinder (HPC), they have little to do with the disk drive's true geometry.

Little Big Adventure

Little Big Adventure is an action-adventure game developed by Adeline Software International and first released at the end of 1994. It was published in Europe by Electronic Arts and in North America, Asia and Oceania under the name Relentless: Twinsen's Adventure by Activision. Over 400,000 copies of the game were sold worldwide in the first release. The game was initially released on CD-ROM and some time later on floppy disks; the CD-ROM version featured full motion video, music and speech whereas the floppy disk version has MIDI music files and still images to replace the videos. The game was later ported to the PC-98 and FM Towns and released in Japan in 1995, for the PlayStation in Japan and Europe in 1996 and 1997 respectively, and to Android and iOS devices in 2014.

In 1997 a PC-only sequel was released under the name of Little Big Adventure 2 (also known as Twinsen's Odyssey).

20 October 2015 the original game was re-released on Steam.

Gameplay

Little Big Adventure is a real-time pseudo-3D isometric action-adventure game. All characters and vehicles in the game, including some props in the world, are real 3D polygon-based objects, performing actions within 2D pre-rendered environments. After completion of certain tasks the player is presented with a full motion video cut-scene. The player-character, Twinsen, can be switched between four different "behaviour modes" (Normal, Athletic/Sporty, Aggressive, and Discreet), each changing the character's abilities and interactions with the game world. Combat in the game is mainly conducted using the Magic Ball, a glowing ball of energy which the player throws towards enemies, the trajectory and angle of the ball changing depending on the mode the player is in. Switching to the "Aggressive" mode also allows Twinsen to engage in combat via punching and kicking.