LBA
Technology & Computing abbreviation · Computer Hardware
| Stands for | Logical block addressing |
|---|---|
| Categories | Technology & Computing |
LBA stands for Logical block addressing, a computer hardware abbreviation.
Scheme that identifies each storage block on a drive by a simple sequential number, starting at 0, instead of its physical cylinder, head and sector position. All modern hard drives, SSDs and memory cards use it.
Example: The diagnostics tool found unreadable sectors starting at LBA 1,204,388.
Usage notes
LBA replaced the older CHS (cylinder-head-sector) scheme, whose limits produced the 528 MB and 8 GB drive-size barriers of the 1990s. The 28-bit LBA of early ATA created a 128 GiB limit, about 137 GB, until 48-bit LBA arrived in 2002. Blocks were traditionally 512 bytes; "Advanced Format" drives use 4,096-byte physical sectors.
Related abbreviations
More computer hardware abbreviations
- IPC – Instructions per clock
- IPMI – Intelligent Platform Management Interface
- IRQ – Interrupt request
- ISA – Instruction set architecture
- JBOD – Just a bunch of disks
- KVM – Keyboard, video and mouse switch
- LGA – Land grid array
- LPDDR – Low-Power Double Data Rate
- LTO – Linear Tape-Open
- M.2 – M.2 (Next Generation Form Factor)
- mATX – Micro-ATX
- MFP – Multifunction printer