4 replies to this topic

[knome18]

I have a problem as soon as i updated to the new 10.4.4 and try and burn to a external firewire lacie dvd drive, i keep getting a not enough sector error,  but the thing is that i'm burning a dual layer disk with only 3 and a half hours of video,  the error is as fallows:

Not Enough sectors available need blah blah needs 8.1gb and blah blah sectors are available (7.9gb)  

But the disk hold 8.5,  i've looked at what it is going to put on the disk and what it says it need in the error is off of what it plans to put on the dvd, i've checked the disk and even tried reducing the video to a single 2 hour clip and put it on a normal dvd and it is saying it needs 5.7gb.  Now that is not right, i've burned longer before and it has never given me this error.  i've even tried deleting the plists. Does anyone know why this could happen?

[tsantee]

The real capacity of an 8.5 GB DL disc is 7.95 GB. The reason for the difference is that computers add bytes differently than do marketing departments.

As for the 2-hour video requiring 5.7 GB, the only reason I can think of is that you must be using a MPEG file that has PCM audio or that you have Toast's Custom Encoder set to PCM instead of Dolby Digital audio.

[davidcc1]

knome18, on Jan 12 2006, 05:47 PM, said:

I have a problem as soon as i updated to the new 10.4.4 and try and burn to a external firewire lacie dvd drive, i keep getting a not enough sector error,  but the thing is that i'm burning a dual layer disk with only 3 and a half hours of video,  the error is as fallows:

Not Enough sectors available need blah blah needs 8.1gb and blah blah sectors are available (7.9gb)  

But the disk hold 8.5,  i've looked at what it is going to put on the disk and what it says it need in the error is off of what it plans to put on the dvd, i've checked the disk and even tried reducing the video to a single 2 hour clip and put it on a normal dvd and it is saying it needs 5.7gb.  Now that is not right, i've burned longer before and it has never given me this error.  i've even tried deleting the plists. Does anyone know why this could happen?

I am burning my first DVD compressed with DVD2oneX after the 10.4.4 update and for the first time I am getting the same error message as you. Instead of the defaulted 4400 I set it to 4200 and will report with my findings.

[laz@okeanos.com]

tsantee, on Jan 13 2006, 05:49 AM, said:

The real capacity of an 8.5 GB DL disc is 7.95 GB. The reason for the difference is that computers add bytes differently than do marketing departments.

Here's a more detailed explanation:

As modern computers use base-2 to represent all data and instructions, originally (and quite logically) powers of two were used to measure quantities of bytes, thus 1 MB == 2^20 or 1,048,576 bytes. Disk drive manufacturers then decided to play a little game with capacity figures using powers of 10, thus 1 MB == 10^6 or 1,000,000, thus slighltly but usefully inflating disk capacities.

In 1998 practice was enshrined in IEC standards (now endoresed by the IEEE and CIPM) and the original power of two based units were renamed: thus the original megabyte is now properly referred to as a mebibyte and the original gigabyte is now referred to as a gibibyte.

[See: http://en.wikipedia.org/wiki/Mebibyte and http://en.wikipedia.org/wiki/Base2]

The situation is further complicated.

Disk formatting tools continue to measure capacity using power of two measurements (i.e. mebibytes and gibibytes) but report them using the prefixes now ascribed by the IEC to power of ten measurements (i.e. megabytes and gigabytes). Similarly, memory capacity continues to be measured using powers of two but again, capacities are stated using the prefixes ascribed by the IEC to power of ten measurements.

So, as per the IEC, DVD-R capacities are truthfully stated and most tools that work with DVD media properly translate powers of ten measurements into powers of two measurements. However, users who are doing their own bit budgeting and/or who are otherwise unaware of the sitation are easily caught off guard and surprised!

Michael Lazar

Edited by laz@okeanos.com, 13 January 2006 - 12:09 PM.

[lyman_deliguori]

davidcc1, on Jan 13 2006, 10:20 AM, said:

I am burning my first DVD compressed with DVD2oneX after the 10.4.4 update and for the first time I am getting the same error message as you. Instead of the defaulted 4400 I set it to 4200 and will report with my findings.

Interesting, as I found just the opposite. I was a moment away from telling Roxio to redo the Code from scracth on V7 and give me my money back; however, when I upgraded to OS 10.4.4 the Sector errors went away. FWIW, I burnt at 4X. Verification was fine.