Re: Unreadable CD created by Roxio Toast

Geoffrey S. Mendelson wrote:
> nospam wrote:
>> verbatim data life plus are not outsourced and should be the same
>> everywhere.  the cheapo verbatims can vary.
>=20
> Thanks, I never knew that.
>=20
> What I have seen is that the disks seem to be blue or yellow. I assume
> that is the color of the dye that gets burned. Yellow (also gold/silver=
)
> disks work better for me in older drives.

You're right. - bluish surfaced CDs donot work very well on older=20
burners like the Yamaha, Mat****a, Panasonic and Sony, which were the=20
brands mostly used those days.

this is the only time, I've lost some burnings, when I bought a -=20
luckily - small case with blue surfaced disks and put them into my=20
Panasonic CRW-7502 with a modified firmware for music burning. - ALL of=20
them went wrong and couldn't be verified afterwards. After that I=20
switched to an Italian brand called VivoStar for databurning and TDK for =

music and had no problems with that drive from that on...

>> nonsense.  many scsi burners have buffer underrun protection (both of
>> mine did) and they can burn at any speed provided the host computer ca=
n
>> source data that fast. =20
>=20
> The original question was about a Yamaha 16x read, 4x burn unit. I have=

> two of them and neither of them has buffer underrun protection. There w=
as
> a firmware upgrade for it, I applied it to one of them and it did not
> seem to fix or break anything. :-)

Yep! Neither the Yamaha, Mat****a, sony or Papasonic SCSI drives have=20
buffer underrun with any kind of burn-proof. - This means that 'high=20
density' files with lots of data will have to be burned at very low=20
speeds of a max. of 4x.

But of cfourse all drives have a buffer itself..-) - else you won't be=20
able to burn with a higher speed than about 1,5x to a max. of 4x.:-)

>> also, most discs these days are optimized for the higher burn speeds
>> and burning too slow is actually worse than burning closer to their
>> rated speed.
>=20
> The TEAC blanks I use are marked 12x-52x, but they burn fine at 1x.

Of course it'll burn fine at 1z.:-) - The 'rating' on a media is meant=20
as a 'thumb rule' for what and which types and speeds avaliable on a=20
specific drive.

> I burn relatively a lot (average 1 set a month) CD's for OLD Macs (680x=
0 series
> and pre-G3 PPC) and get good results burning them no faster the=20
> read speed of the target drive.

Good suggestion... When i burn disks that should have a high precision=20
level, I only burn at a speed of 4x - i.e. music CDs and copies of old=20
bootable system disks, so i can spare my originals. Normal data Cds I=20
burn of speeds up to a max. of 32x...

> For some strange reason, CD's burned on PC's using DVD burners work fin=
e
> when they are burned at any speed, athough I try to use 8x, which for=20
> most of them is the minimum.

That's probably because the laser in a DVD drive has to be quite a lot=20
more precise to be able to burn all the amount of data on a DVD (movie + =

sound) to be able to be read in a drive

Cheers, Erik richard

--=20
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