CD to ISO: ISO bigger than source

[truntyholes]

After using the CD to ISO option, I noticed that the ISO was much bigger than the source CD itself.

 

Source: 146 MB (note that this is the stated size from the inserted CD)

ISO: 656 MB

 

Viewing the ISO in WinRAR, it also says that it is 146 MB large.

 

It has also happened to another CD:

 

Source: 172 MB

ISO: 386 MB

 

But then one time, they were nearly the same size.

 

Why does this happen and what can I do to fix this?

Edited September 21, 2014 by truntyholes

[truntyholes]

Here's the log for the first CD:

 

//****************************************\\

;   ImgBurn Version 2.5.7.0 - Log

;   Friday, 18 July 2014, 12:11:15

; \\****************************************//

;

;

I 12:08:57 ImgBurn Version 2.5.7.0 started!

I 12:08:57 Microsoft Windows 7 Home Premium x64 Edition (6.1, Build 7601 : Service Pack 1)

I 12:08:57 Total Physical Memory: 4,102,860 KB  -  Available: 1,545,092 KB

I 12:08:57 Initialising SPTI...

I 12:08:57 Searching for SCSI / ATAPI devices...

I 12:09:00 -> Drive 1 - Info: MATSHITA DVD-RAM UJ8B0 1.00 (E:) (ATAPI)

I 12:09:00 -> Drive 2 - Info: ELBY CLONEDRIVE 1.4 (F:) (SCSI)

I 12:09:00 Found 1 DVD±RW/RAM and 1 BD-ROM/HD DVD-ROM!

I 12:10:31 Operation Started!

I 12:10:31 Source Device: [1:0:0] ELBY CLONEDRIVE 1.4 (F:) (SCSI)

I 12:10:31 Source Media Type: DVD-ROM (Book Type: DVD-ROM)

I 12:10:31 Source Media Sectors: 336,314 (Track Path: PTP)

I 12:10:31 Source Media Size: 688,771,072 bytes

I 12:10:31 Source Media Volume Identifier: NU2 V1.1

I 12:10:31 Source Media Volume Set Identifier: NOT_SET

I 12:10:31 Source Media Application Identifier: TOAST ISO 9660 BUILDER COPYRIGHT © 1997 ADAPTEC, INC. - HAVE A NICE DAY

I 12:10:31 Source Media File System(s): ISO9660, Joliet

I 12:10:31 Read Speed (Data/Audio): MAX / 8x

I 12:10:31 Destination File: D:\disposal bin\NU2 V1.1.ISO

I 12:10:31 Destination Free Space: 7,025,336,320 Bytes (6,860,680.00 KB) (6,699.88 MB) (6.54 GB)

I 12:10:31 Destination File System: NTFS

I 12:10:31 File Splitting: Auto

I 12:10:34 Reading Session 1 of 1... (1 Track, LBA: 0 - 336313)

I 12:10:34 Reading Track 1 of 1... (MODE1/2048, LBA: 0 - 336313)

I 12:11:11 Exporting Graph Data...

I 12:11:11 Graph Data File: C:\Users\Allen\AppData\Roaming\ImgBurn\Graph Data Files\ELBY_CLONEDRIVE_1.4_FRIDAY-18-JULY-2014_12-10_PM_N-A.ibg

I 12:11:11 Export Successfully Completed!

I 12:11:11 Operation Successfully Completed! - Duration: 00:00:38

I 12:11:11 Average Read Rate: 17,700 KB/s (12.8x) - Maximum Read Rate: 34,809 KB/s (25.1x)

I 12:11:15 Close Request Acknowledged

I 12:11:15 Closing Down...

I 12:11:15 Shutting down SPTI...

I 12:11:15 ImgBurn closed!

[LIGHTNING UK!]

You can't do anything, that's the size of the disc as the drive is reporting it.