What's an LBA?

vbimport

#1

Hi, what's the LBA number that CDR Identifier gives you? Does it actually tell you something, or what?


#2

A logical block address is a 28-bit value that maps to a specific cylinder-head-sector address on the disk.

or at least that’s how it is on a Harddisk !!! Don’t know if the same thing is valid on a CD. (apart from the cylinder-head thing)

LBA is what makes a PC use a HDD larger than 528 MB. 28 Bit makes it possible to acces up to 8.4 GB.


#3

Never seen any LBA’s in CDR Identifier…:confused:


#4

Yes there is:

ATIP: 97m 28s 12f
Disc Manufacturer: Gigastorage Corp.
Reflective layer: Dye (Long strategy; e.g. Cyanine, Azo etc.)
Media type: CD-Recordable
Recording Speeds: min. unknown - max. unknown
Nominal Capacity: 702.83MB (79m 59s 74f / LBA: 359849)


#5

LBA is the “other” way of describing the contents of a cd.
The usual way are minutes and seconds, but LBA shows the sectors.

In the example G@M3FR3@K described
Nominal Capacity: 702.83MB (79m 59s 74f / LBA: 359849),
it means that there are 359849 empty sectors on the CD.

edit: I forgot to say why LBA can be usefull :slight_smile:
=> e.g. with CDRWIN, you can choose “copy sectors to harddisc”. This can be used if you want to rip a copyprotected audio cd.
You enter sector 0 (start) and sector xxxxxx (the end of the cd) and CDRWIN rips those sectors to .wav. (“copy tracks” won’t work, because of the copy protection’s fake table of contents)


#6

Ah, must look closer next time… :slight_smile:


#7

cool, thanks wannes