track/ disc at once????

[ninad_mhatre85]

hi guys can anyone tell me wats the difference between track at once & disc at once ......

by default its at track at once .... which one is better & why ???

 

[kalpik]

Track at once lets you create multisession disks, whereas disk at once does not let you create multisession disks. If you are burning a disk to its full capacity, disk at once is recommended.

 

[blueshift]

Track at once lets you create multisession disks, whereas disk at once does not let you create multisession disks. If you are burning a disk to its full capacity, disk at once is recommended.

I think the information you gave is incorrect.
I am able to create mutisession disks in both Track/Disc at once mode.

The difference is that Track mode writes each single track. It is mostly used for creating audio CDs so that you can have a 2 or 3 seconds silence between the audio songs.
Disc-at-once mode does not create such gaps. It is recommended for most type of data that you want to burn.

 

[kalpik]

Umm.. i dont really think you can create multisession with disk at once..

Track-At-Once or Disc-At-Once? Use track-at-once for creating multisession data CDs. The drive initiates the disc's lead-in, burns the data, then goes back to the lead-in to tell the disc where the files are stored (similar to the way a file-allocation table works). The drive then completes the process by writing the lead-out for the disc, which identifies where one write session ends and the next begins. This requires a lot of overhead, so you'll get less than 700MB of space for data on the disc. Roxio's Easy Media Creator chooses the correct session automatically; Nero automatically selects track-at-once, but it does give you the option to change it--so leave that setting alone.

Use disc-at-once if you're writing to the disc one time. With disc-at-once, the drive writes all the data in one fell swoop and automatically finalizes the disc. This is useful for maximizing the amount of content you can put on a disc. Disc-at-once is also best for creating master discs, because disc duplicators can't use discs written with track-at-once. Again, Roxio automates this process; Nero picks it for you, but also allows you to change the option if you choose.

There are two basic ways of writing to a CD-R. Disc-at-once (DAO) writes the entire CD in one pass, possibly writing multiple tracks. The entire burn must complete without interruption, and no further information may be added.

Track-at-once (TAO) allows the writes to be done in multiple passes. There is a minimum track length of 300 blocks (600K for typical data CDs), and a maximum of 99 tracks per disc, as well as a slight additional overhead associated with stopping and restarting the laser.

Because the laser is turned off and on for every track, the recorder leaves a couple of blocks between tracks, called run-out and run-in blocks. If done correctly, the blocks will be silent and usually unnoticeable. CDs with tracks that run together will have a barely noticeable "hiccup". Some combinations of software and hardware may leave junk in the gap, resulting in a slight but annoying click between tracks. Some drives and/or software packages may not let you control the size of the gap between audio tracks when recording in track-at-once mode, leaving you with 2-second gaps even if the original didn't have them.

Many recorders, starting with the venerable Philips CDD2000, allow "session-at-once" (SAO) recording. This gives you disc-at-once control over the gaps between tracks, but allows you to leave the disc open. This can be handy when writing CD Extra discs (see section (3-14)).

There are some cases where disc-at-once recording is required. For example, it may be difficult or impossible to make identical backup copies of some kinds of discs without using disc-at-once mode (e.g. copy-protected PC games). Also, some CD mastering plants may not accept discs recorded in track-at-once mode, because the gaps between tracks will show up as uncorrectable errors.

The bottom line is that disc-at-once recording gives you more control over disc creation, especially for audio CDs, but isn't always appropriate or necessary. It's a good idea to get a recorder that supports both disc-at-once and track-at-once recording.

 

[aditya.shevade]

thank you I have been wondering what they were. Nice help Kalpik

Aditya