Mobile/PDA About Us Advertise here
User User name Password  
  Not registered yet? Register here.
Lost your password? Click here. 		 
  Home   News   Guides   Downloads   Glossary   Hardware   Profiles   Forums   v4  
 Advertise at AfterDawn.com     Link to us!     Private messages     Compose a private message     List of all updated threads     Threads without replies     Search messages
Monday 23.12.2024 / 20:10
Search AfterDawn Forums:        In English   Suomeksi   På svenska
afterdawn.com > forums > archived forums > cd-r > mode 1 vs mode 2 form 1 ?
Show topics
 
Forums
Forums
Mode 1 vs Mode 2 Form 1 ?
  Jump to:
 
Posted Message
jdlugosz
Newbie
_ 		10. February 2003 @ 17:20 _ Link to this message    Send private message to this user   
I was surprised to see some data CD-ROM's created as "CD-XA" containing one track of mode 2 form 1, instead of the normal mode 1.

Why would it be made that way? The CDR FAQ (http://www.cdrfaq.org/faq02.html#S2-43-4)says "Mode 2 extends the definition of a Mode 2 CD-ROM. Form 1 looks like a slight rearrangement of a Mode 1 sector, with the 8 bytes of space moved ahead of the user data and filled with a sub-header."

Is this sub-header used for anything interesting? Is Mode 2 Form 1 better than Mode 1 somehow, other than for getting around the restriction of mixing modes on one disc?

--John
[ + quote]
aldaco12
AfterDawn Addict
_ 		10. February 2003 @ 22:48 _ Link to this message    Send private message to this user   
If you read
http://www.disctronics.co.uk/technology/cd-rom/cdrom_spec.htm#Mode%202%20Sectors
you can see that Mode2Form1 is almost identical to Mode1, except for 8 bytes that are unused in Mode1 and used as a 'subheader' for Mode2Form1. I assume info in the 'subheader' specify if the sector is Form1 and Form2.

--------------------------------------------------------------------------
Quoting from disctronic's web site:
" Note that Mode 1 and Mode 2 Form 1 use the same error correction so can be used interchangeably, but not within the same track and preferably not on the same disc. Software used to write CD-Rs can be set for Mode 1 or Mode 2 Form 1. Almost all PCs and Macs will read Mode 2 Form 1 CD-ROMs as well as Mode 1 "
--------------------------------------------------------------------------

So you understand that Mode1 or Mode2Form2 are more or else the same, with the exception that CD-XA (extended architecture, DATA+AUDIO) are always burned in MODE2 datatype.
[ + quote]
afterdawn.com > forums > archived forums > cd-r > mode 1 vs mode 2 form 1 ?
 

Digital video: AfterDawn.com | AfterDawn Forums
Music: MP3Lizard.com
Gaming: Blasteroids.com | Blasteroids Forums | Compare game prices
Software: Software downloads
Blogs: User profile pages
RSS feeds: AfterDawn.com News | Software updates | AfterDawn Forums
International: AfterDawn in Finnish | AfterDawn in Swedish | AfterDawn in Norwegian | download.fi
Navigate: Search | Site map
About us: About AfterDawn Ltd | Advertise on our sites | Rules, Restrictions, Legal disclaimer & Privacy policy
Contact us: Send feedback | Contact our media sales team
 
  © 1999-2024 by AfterDawn Ltd.

  IDG TechNetwork