Printer Friendly
Dictionary, Encyclopedia and Thesaurus - The Free Dictionary
3,914,827,442 visitors served.
forum Join the Word of the Day Mailing List For webmasters
?
Dictionary/
thesaurus
Medical
dictionary
Legal
dictionary
Financial
dictionary
Acronyms
 
Idioms
Encyclopedia
Wikipedia
encyclopedia
?

Logical Block Addressing

   Also found in: Acronyms, Wikipedia 0.01 sec.
(storage)Logical Block Addressing - (LBA) A hard disk sector addressing scheme used on all SCSI hard disks, and on ATA-2 conforming IDE hard disks. The addressing conversion is performed by the hard disk firmware.

Prior to LBA, combined limitations of IBM PC BIOS and ATA restricted the useful capacity of IDE hard disks on IBM PCs and compatibles to 1024 cylinders * 63 sectors per track * 16 heads * 512 bytes per sector = 528 million bytes = 504 megabytes. Modern BIOSes select LBA mode automatically, and work around the 1024-cylinder BIOS limit by representing a hard disk to the OS as having e.g. half as many cylinders and twice as many heads. However, there is still an unbreakable BIOS disk size limit of 1024 cylinders * 63 sectors per track * 256 heads * 512 bytes per sector = 8 gigabytes, but modern OSes (including Windows 9x, Windows NT and Linux) are not affected by it, since they issue direct LBA-based calls, bypassing the BIOS hard disk services completely.
Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content.
?Page tools
Printer friendly
Cite / link 		Feedback
Mentioned in?  References in periodicals archive?   Encyclopedia browser?   Full browser?
No references found
 
The LSI Logic MegaRAID ATA 133-2 is delivered in a low-profile PCI (MD2) form factor for tight enclosure environments and supports 48-bit Logical Block Addressing for use with 137 Gigabit and higher hard drives.
LSI LOGIC DEBUTS ATA RAID SOLUTION FOR WORKSTATIONS by Computer Workstations
Quick Disk complies with the new Enhanced IDE (EIDE) standard and is fully compatible with any BIOS that supports logical block addressing (LBA).
New software utility facilitates installation and operation of newer ... by Business Wire
The new SL82C105 supports up to four disk drives, new faster data transfer modes (PIO mode 3, 4 and 5 and DMA modes 0, 1 and 2), and supports Logical Block Addressing (LBA), allowing hard drive capacity of up to 8 gigabytes.
Embedded BIOS support for bus master IDE announced by Symphony ... by Business Wire
 
 
 
Encyclopedia
?

Terms of Use | Privacy policy | Feedback | Advertise with Us | Copyright © 2012 Farlex, Inc.
Disclaimer
All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.