LinuxQuestions.org
Visit Jeremy's Blog.
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Newbie
User Name
Password
Linux - Newbie This Linux forum is for members that are new to Linux.
Just starting out and have a question? If it is not in the man pages or the how-to's this is the place!

Notices

Reply
 
Search this Thread
Old 10-20-2005, 03:28 PM   #1
willie883
LQ Newbie
 
Registered: Oct 2005
Location: IL
Posts: 4

Rep: Reputation: 0
ISO too large to burn to CD


I know how to burn. using roxio. I downloaded the ISO's and the are over 700 mb. too large to burn to a cd. My standard CD's are 640 mb. I'm trying to install a new HD & OS.
Thanks,
Ed
 
Old 10-20-2005, 03:34 PM   #2
win32sux
Guru
 
Registered: Jul 2003
Location: Los Angeles
Distribution: Ubuntu
Posts: 9,870

Rep: Reputation: 371Reputation: 371Reputation: 371Reputation: 371
welcome to LQ!

what is the exact size of the ISO?? you probably just need to get yourself a 700MB cd to burn it on...

if for some reason you NEED to use your 640MB cd what you can do is mount the ISO, copy the contents to your hard drive, remove any files you don't want/need, and then re-create an ISO which fits on your cd using the stripped-down content...

just my $0.02...
 
Old 10-20-2005, 03:49 PM   #3
willie883
LQ Newbie
 
Registered: Oct 2005
Location: IL
Posts: 4

Original Poster
Rep: Reputation: 0
That would be fine with me. ISO CD 1 = 708 MB ISO CD2 & CD3 = 711MB.
 
Old 10-20-2005, 04:09 PM   #4
win32sux
Guru
 
Registered: Jul 2003
Location: Los Angeles
Distribution: Ubuntu
Posts: 9,870

Rep: Reputation: 371Reputation: 371Reputation: 371Reputation: 371
well, i've burned ISOs that weigh more than 700MB onto 700MB cds... i think there might be some discrepency between the way we usually measure file sizes and the way the space on the cd is calculated, or perhaps cd manufacturers are known to include more media than is marked?? i don't know man, if i were you i'd just burn the image to a 700MB cd and see if the burn completes without errors, and then i'd do an MD5SUM check of all the files on the disk to make sure everything's perfect...
 
Old 10-20-2005, 04:24 PM   #5
imitheos
Member
 
Registered: May 2005
Location: Greece
Posts: 374

Rep: Reputation: 55
Quote:
Originally posted by win32sux
well, i've burned ISOs that weigh more than 700MB onto 700MB cds... i think there might be some discrepency between the way we usually measure file sizes and the way the space on the cd is calculated, or perhaps cd manufacturers are known to include more media than is marked?? i don't know man, if i were you i'd just burn the image to a 700MB cd and see if the burn completes without errors, and then i'd do an MD5SUM check of all the files on the disk to make sure everything's perfect...
A 700mb CD is 80min

** Math Follows **

80min * 60 sec/min = 4800 sec
4800 sec * 75 sectors/sec = 360,000 sectors
360,000 sectors * 2048 bytes/sector = 737,280,000 bytes

So a 80min cd can contain 737,280,000 raw bytes. If you think that some of these are the ISO9660 stuff then you lose a
few mbs.

737,280,000 bytes / 1048576 bytes/mb = 703MB
Some people see the size of the iso in bytes and think "ah it is more than 700" but the size in MBs is not more than 700MB

now this is when using MODE1 cds (data cds)

A cd has 2352 bytes/sectors. 2048 are used for data and the other for error correction and other uses.
If you have a VCD for example or other (MODE1/RAW,MODE2,whatever) then it uses all the 2352 bytes/sector
so this translates to 846,720,000 bytes. that is why when you rip a vcd it is sometimes 800mb

I hope i helped and didn't confuse you
 
Old 10-20-2005, 04:37 PM   #6
win32sux
Guru
 
Registered: Jul 2003
Location: Los Angeles
Distribution: Ubuntu
Posts: 9,870

Rep: Reputation: 371Reputation: 371Reputation: 371Reputation: 371
Quote:
Originally posted by imitheos
A 700mb CD is 80min

** Math Follows **

80min * 60 sec/min = 4800 sec
4800 sec * 75 sectors/sec = 360,000 sectors
360,000 sectors * 2048 bytes/sector = 737,280,000 bytes

So a 80min cd can contain 737,280,000 raw bytes. If you think that some of these are the ISO9660 stuff then you lose a
few mbs.

737,280,000 bytes / 1048576 bytes/mb = 703MB
Some people see the size of the iso in bytes and think "ah it is more than 700" but the size in MBs is not more than 700MB

now this is when using MODE1 cds (data cds)

A cd has 2352 bytes/sectors. 2048 are used for data and the other for error correction and other uses.
If you have a VCD for example or other (MODE1/RAW,MODE2,whatever) then it uses all the 2352 bytes/sector
so this translates to 846,720,000 bytes. that is why when you rip a vcd it is sometimes 800mb

I hope i helped and didn't confuse you
i know that cd sizes are pure math and stuff, but what would be the mathematical explanation for a "711MB ISO" (as posted above by willie883) fitting on a "700MB" cd?? i mean, let's say he goes ahead with the burn and the md5sum checks-out fine for all the files... if there's supposed to only be 703MB available and the image weighed 711mb then there should be some data loss, no?? if there isn't any data loss ("du" confirms the size and md5sum confirms the integrity of the files) then what exactly is going on??
 
Old 10-21-2005, 08:08 AM   #7
BoldKiller
Member
 
Registered: Apr 2002
Location: Montreal, Quebec
Distribution: Debian, Gentoo, RedHat
Posts: 142

Rep: Reputation: 15
Quote:
Originally posted by win32sux
i know that cd sizes are pure math and stuff, but what would be the mathematical explanation for a "711MB ISO" (as posted above by willie883) fitting on a "700MB" cd?? i mean, let's say he goes ahead with the burn and the md5sum checks-out fine for all the files... if there's supposed to only be 703MB available and the image weighed 711mb then there should be some data loss, no?? if there isn't any data loss ("du" confirms the size and md5sum confirms the integrity of the files) then what exactly is going on??
This is what imitheos meant. There is more than 700mb on a CD. Because the 700mb is just for the data. There is the "partition/format" overhead that is not counted.

Also, keep in mind files on disk take at least one block of data. Even if they dont fill the block completely. So Files are usally reported greater than they actually are (usaly a few Kb, but can up to a few Mb).
 
Old 10-21-2005, 08:39 AM   #8
imitheos
Member
 
Registered: May 2005
Location: Greece
Posts: 374

Rep: Reputation: 55
Quote:
Originally posted by win32sux
i know that cd sizes are pure math and stuff, but what would be the mathematical explanation for a "711MB ISO" (as posted above by willie883) fitting on a "700MB" cd?? i mean, let's say he goes ahead with the burn and the md5sum checks-out fine for all the files... if there's supposed to only be 703MB available and the image weighed 711mb then there should be some data loss, no?? if there isn't any data loss ("du" confirms the size and md5sum confirms the integrity of the files) then what exactly is going on??
The confusion comes from MB and MiB (large MB)
Some people say that they burnt 720MB on the cd and they mean 720,000,000 bytes which if you divide it with 1024*1024
is smaller than 700MB

Let me mention an example.

bash$ ls -al slackware-10.2-install-d1.iso
-rw-r--r-- 1 root root 668659712 2005-09-19 20:02 slackware-10.2-install-d1.iso

Some people will say i burnt 668MB in a 650MB cd.
This is not true because this image is 668,659,712 bytes. If you divide this with 1024 you have 652,988KB and if you divide this
again with 1024 you have almost 638MB.

So this is smaller than 650MB.

I don't mention the different modes again because i mentioned them in my previous post and even there i gave very little
information, because i didn't want to confuse.
 
Old 10-21-2005, 08:58 AM   #9
jpkirchner
LQ Newbie
 
Registered: Sep 2005
Location: Malta, NY
Distribution: Slackware 13.37
Posts: 12

Rep: Reputation: 0
Re: ISO too large to burn to CD

Quote:
Originally posted by willie883
I know how to burn. using roxio. I downloaded the ISO's and the are over 700 mb. too large to burn to a cd. My standard CD's are 640 mb. I'm trying to install a new HD & OS.
Thanks,
Ed
Have you tried it? I have gotten iso's from bit torrent and other places that seem to large but when I burn the image all is well with the world....
 
Old 10-21-2005, 10:07 AM   #10
willie883
LQ Newbie
 
Registered: Oct 2005
Location: IL
Posts: 4

Original Poster
Rep: Reputation: 0
I've attempted to burn them a couple of different times, the same results, too large. Tried drag and drop, creator classic, & disc copy. The CD's state they are 640. What I'm I missing? By the way thank for the math.
 
Old 10-21-2005, 10:14 AM   #11
jpkirchner
LQ Newbie
 
Registered: Sep 2005
Location: Malta, NY
Distribution: Slackware 13.37
Posts: 12

Rep: Reputation: 0
Quote:
Originally posted by willie883
I've attempted to burn them a couple of different times, the same results, too large. Tried drag and drop, creator classic, & disc copy. The CD's state they are 640. What I'm I missing? By the way thank for the math.
You need to burn them as an image. I am not familiar with roxio. There is usually an option to create a cd from an image. At that point you select your iso and it burns from there. If you try burning these using the drag and drop or just burning the iso the cd will not boot as expected.

If roxio can't do it, know Nero can as well as Alcohol 120

EDIT: I checked the Roxio site. It does support iso's. You need to look for the selection to create a cd from an image.

Last edited by jpkirchner; 10-21-2005 at 10:17 AM.
 
Old 10-21-2005, 10:37 AM   #12
willie883
LQ Newbie
 
Registered: Oct 2005
Location: IL
Posts: 4

Original Poster
Rep: Reputation: 0
Thank you for your response. I downloaded alcohol 120, launched the image burn wizard & for the CD it tells me the image is too large. Maybe I downloaded the wrong ISO. It is off of this site, Mandrakelinux-10.1-official-download-cd1.i586.iso is this right?
 
Old 10-21-2005, 10:53 AM   #13
jpkirchner
LQ Newbie
 
Registered: Sep 2005
Location: Malta, NY
Distribution: Slackware 13.37
Posts: 12

Rep: Reputation: 0
I think you are going to have to invest in some 700mb cd's.
 
Old 10-21-2005, 11:58 AM   #14
win32sux
Guru
 
Registered: Jul 2003
Location: Los Angeles
Distribution: Ubuntu
Posts: 9,870

Rep: Reputation: 371Reputation: 371Reputation: 371Reputation: 371
Quote:
Originally posted by willie883
I've attempted to burn them a couple of different times, the same results, too large. Tried drag and drop, creator classic, & disc copy. The CD's state they are 640. What I'm I missing?
you are missing a 700MB blank CD...
 
Old 10-22-2005, 10:38 AM   #15
BoldKiller
Member
 
Registered: Apr 2002
Location: Montreal, Quebec
Distribution: Debian, Gentoo, RedHat
Posts: 142

Rep: Reputation: 15
Quote:
Originally posted by jpkirchner
EDIT: I checked the Roxio site. It does support iso's. You need to look for the selection to create a cd from an image. [/B]
I use to use Roxio and it was able to burn images fine. I can't imagine they reoved the feature in later version!
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Trying to burn extra large .iso file! elliotfuller Suse/Novell 5 06-24-2005 07:18 AM
Cant burn mandrake to a CD, Large file. :King_58: Linux - Newbie 7 11-29-2004 01:28 PM
k3b error with audio cd burn (no prob with iso burn) bluem Linux - Newbie 1 04-16-2004 08:05 AM
I downloaded the gentoo iso in mandrake, what program do i burn the iso with backflippin General 4 04-05-2004 10:20 AM
Do I burn the ISO, or burn what's contained in it? Borg Swarm Linux - General 1 02-06-2004 05:30 PM


All times are GMT -5. The time now is 06:02 AM.

Main Menu
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
identi.ca: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration