I backed up leopard and have a problem

[dukebound85]

so i backed up my leopard dvd using disk utilities with DVD/CD master and no encryption used for the image and burned at lowest rate possible

i burned it to a Memorex DVD+R DL and yet my macbook wont recognize it and spits it out

however, the machine i burned it on will recognize it and mount it just like the orginal install disk

any ideas on why my macbook wont? i know the mb cant write to dl dvd's but should be able to read them right?

i should add i can also boot into the backup dvd on the computer i burned it on

 

[motulist]

Does your macbook successfully read other DL DVD disks that you've burned from the same machine? And if so, were those other DL DVDs burned with a single file that was large enough that it had to span both layers? In other words, I'm thinking that it might be possible that your macbook's optical drive has difficulty reading both layers of a dual layer dvd. Maybe.

 

[dukebound85]

Does your macbook successfully read other DL DVD disks that you've burned from the same machine? And if so, were those other DL DVDs burned with a single file that was large enough that it had to span both layers? In other words, I'm thinking that it might be possible that your macbook's optical drive has difficulty reading both layers of a dual layer dvd. Maybe.

it can read the original leopard disk which is dual layer

as far as other dl disk ive burned, this was the first one. is it possible my mb cant read this type of disk (dvd+r dl)? while maybe reading whatever apple used for theirs (dvd-r dl maybe??)?

 

[motulist]

it can read the original leopard disk which is dual layer

as far as other dl disk ive burned, this was the first one. is it possible my mb cant read this type of disk (dvd+r dl)? while maybe reading whatever apple used for theirs (dvd-r dl maybe??)?

If it's the current unibody MB, then the tech specs says it can read both.

Maximum read: 8x DVD-R, DVD+R, DVD-ROM; 6x DVD-ROM (double layer DVD-9), DVD-R DL (double layer), DVD+R DL (double layer), DVD-RW, and DVD+RW; 24x CD

http://www.apple.com/macbook/specs.html

If it's an earlier model, use the wayback machine to go to the old version of Apple's site and check the tech specs for the earlier model that you have. Out of curiosity, how do you know that the Apple installer disk is DL?

EDIT:
I notice that DL rewritable isn't on that list, so if the disk you're using is a DL DVDRW then it won't read it.

 

[dukebound85]

If it's the current unibody MB, then the tech specs says it can read both.

Maximum read: 8x DVD-R, DVD+R, DVD-ROM; 6x DVD-ROM (double layer DVD-9), DVD-R DL (double layer), DVD+R DL (double layer), DVD-RW, and DVD+RW; 24x CD

http://www.apple.com/macbook/specs.html

If it's an earlier model, use the wayback machine to go to the old version of Apple's site and check the tech specs for the earlier model that you have. Out of curiosity, how do you know that the Apple installer disk is DL?

my macbook is a first gen from July 2006 with superdrive.

as far as knowing the apple installer disk is DL, I just figured it is since the image is 7.5 gigs which would imply DL. plus it is to my understanding, all movies are on DL disks pretty much and my mb has no problem playing them

no, im not using a DLRW as the price would be insane!

 

[motulist]

I just figured it is since the image is 7.5 gigs which would imply DL.

Yup, that's too big to be single layer DVD.

plus it is to my understanding, all movies are on DL disks pretty much and my mb has no problem playing them

I'm not too familiar with how commercial dvd movies are formatted, but that sounds plausible.

Check the wayback machine and find the tech specs from Apple's old site for your generation MB to see if it reads DL DVDR disks.

http://www.archive.org/web/web.php

 

[dukebound85]

thats a sweet site lol

anyways, this is what it says

Slot-loading SuperDrive with double-layer read support (DVD+R DL/DVD±RW/CD-RW): writes DVD-R and DVD+R discs at up to 4x speed, writes DVD-RW and DVD+RW discs at up to 4x speed, reads DVDs at up to 8x speed, writes CD-R discs at up to 24x speed, writes CD-RW discs at up to 10x speed, reads CDs at up to 24x speed

so it should be able to

here is whats weird as i just tried it. it can detect an blank DVD+R DL from the same spindle but not the one I burned

 

[motulist]

thats a sweet site lol

anyways, this is what it says


so it should be able to

here is whats weird as i just tried it. it can detect an blank DVD+R DL from the same spindle but not the one I burned

It's written in a kind of unclear manner. Here's the way I read what that says;

It reads DL DVD+R, and DVD±RW, and CD-RW

So as I read it, it says it reads DL DVD+R, but not DL DVD-R. You said your disk is a plus right? So it should read that no problem. Maybe there's just a problem with the particular disk you burned. Did it verify correctly?

 

[dukebound85]

It's written in a kind of unclear manner. Here's the way I read what that says;



So as I read it, it says it reads DL DVD+R, but not DL DVD-R. You said your disk is a plus right? So it should read that no problem. Maybe there's just a problem with the particular disk you burned. Did it verify correctly?

yea it verified and it works on my other computer so if it wasn't good, it shouldnt read on that one either right?

is memorex just a bad brand maybe?

 

[motulist]

yea it verified and it works on my other computer so if it wasn't good, it shouldnt read on that one either right?

is memorex just a bad brand maybe?

there's not much else I can't tell you, maybe someone else might have more info. If I were in your position, I'd try burning a bunch of different disks under different conditions and see what works and what doesn't. I'd try burning another disk the same way but with smaller files rather than a single file that spans both layers, I'd try using the same blank disks but burned by a different computer, I'd try a different brand of disk in the same computer,etc. That way you'll find out where the problem is.

Good luck.

 

[dukebound85]

seems its Ritek (who makes the DVD's) that sucks and is well known in the industry

reviews on the same disks from circuit city
http://www.circuitcity.com/ccd/ExpandedModule.do?oid=199231&callingModule=9#custRatings


that's. just. peachy....


i guess do not buy Memorex DL discs as everyone in the Club CDFreaks forum says Verbaitem is the God of DL disks

i wonder if i have grounds to return these. what you think?

edit: my brother's macbook from fall 2007 reads it just fine but my dad's mbp from 2006 doesn't either. whats going on??