Toshiba PORTEGE R700 - Manual (Page 103)

DISC created in DVD-R DL format4 (Layer Jump Recording) cannot
be read.
If the disc is poor in quality, or is dirty or damaged, writing or rewriting
errors may be noted - ensure that you check all discs for dirt or
damage before you use them.
The actual number of rewrites to CD-RW, DVD-RW, DVD+RW or
DVD-RAM media will be affected by the quality of the disc itself and
the way in which it is used.
There are two types of DVD-R media available, authoring discs and
general use discs. Do not attempt to use authoring discs as only
general use discs can be written to by a computer drive.
You can use both DVD-RAM discs that can be removed from a
cartridge and DVD-RAM discs designed without a cartridge.
You may find that other computer DVD-ROM drives or other DVD
players may not be able to read DVD-R, DVD-R DL, DVD-RW, DVD
+R, DVD+R DL, or DVD+RW discs.
Data written to a CD-R, DVD-R, DVD-R DL, DVD+R or DVD+R discs
cannot be deleted either in whole or in part.
Data deleted/erased from a CD-RW, DVD-RW, DVD+RW or DVD-
RAM disc cannot be recovered. You must check the content of the
disc carefully before you delete it, taking care that, if multiple drives
that can write data to discs are connected, you do not delete data from
the wrong one.
In writing to DVD-R, DVD-R DL, DVD-RW, DVD+R, DVD+R DL, DVD
+RW or DVD-RAM media, some space is required for file
management, so you may not be able to write to the full capacity of
the disc.
Since the disc is based on the DVD standard, it might be filled with
dummy data if the written data is less than about 1GB. Therefore, in
these circumstance, even if you write only a small amount of data, it
might take additional time to fill in the dummy data.
When multiple drives that can write data to discs are connected, be
sure that you do not write to or delete data from the wrong drive.
Be sure to connect the AC adaptor to the computer before you write or
rewrite any information.
Before you enter either Sleep Mode or Hibernation Mode, take care to
ensure that any optical disc drive writing has been completed. In this
instance, writing is finished if you can eject the optical disc.
Be sure to close all other software programs except for the writing
software itself.
Do not run software such as a screen saver which can put a heavy
load on the processor.
Operate the computer at its full power settings - do not use any power-
saving features.
PORTÉGÉ R700 / Satellite R630
User's Manual 4-23